2 stroke crank seal replacement Replacing crank seals in a Robin 244 engine. By hand it's a monster. The cank seals keep transmisssion oil from entering the crankcase, where in the fuel mixture ent Jul 4, 2013 · If you suspect the crank seal, put the crank breather tube in a glass of water and give the bike a good rev, If you see bubbles your seal is gone. I know to lube the inner lips with grease or 2t oil, but does anyone use anything on the outer seal where it fits to the engine cases? Like yamabond? Opinions welcome, thanks. Mar 11, 2017 · Specifically both crank seals, countershaft seal, shift shaft seal, and water pump seals. the only seals that seal the trany is the centre and the right seals. A 1000 bucks at least to get set up . Water pump seal is directional, it says "oil side", or "water side" on it. Be really careful not to seat too deep or crooked. Both sleds had @7400 Nov 12, 2015 · I Pressure tested the RV case, and found it only lost about a pound over one day. Feb 19, 2014 #1 Oct 20, 2009 · Remove the primary gear and, if it has one, the primary collar. Thanks Oct 28, 2009 · 04 rm250 clutch side seal. How to fix engine oil leak in your car. I need to change the crank seal, but I really don't feel like splitting the cases. For first aid, degrease the missing oil seal and crankcase completely with acetone, then apply more gasoline-resistant liquid gasket to the outer Jun 10, 2014 · I have been noticing that my ktm 200 is starting to smoke excessively and spooge. Aug 6, 2008 · Re: Yamaha G1 <>Step by step instructions to change crankshaft seals<> i cant seem to get my seal in right on fan side cause when i tapin 1 side the other comes out then i tap the side that comes out then the 1 i just tapped in comes out please help im thinking about puting some kind on pipe on it and tightning the bolt to puch it in evenly Aug 30, 2019 · No, you got itwhen the 2Ts get hours on them its good to replace crank seals and check crank and rod bearingssounds like you have fresh piston and rings. Hatch New Member. 2 stroke ezgo seal placement 3pg 2 stroke crank seal: in this video I show you how to replace the crank seal on a lawn boy lawnmower #smallenginerepair #lawnmower Jun 7, 2011 · The cases are similar if not identical to old AT1/CT1 125/175cc engines. Yamaha 2 Stroke ; Seal replacement YZ250 Theme . Jan 11, 2021 · Replacing the Crank Seals on a 2 Stroke Engine. Edited July 7, 2013 by bonescr250r Apr 15, 2014 · I need to change the right crank seal on my `94 DS80. Why would these seals need replacing? Like any mechanical component crankshaft Be careful not to scar the case or crank where the seal sits. Refer to service manual for all torque specs. When re-assembling, wedge an aluminuim washer inbetween the gear on the clutch basket and the primary drive gear (the gear on the crank shaft) and that way you can properly torque it but you could always just hammer on it alittle with the impact. By NicholasA, Jan 2, 2009 · 1986 EZ Go 2 Stroke, freshly rebuilt motor and blows out the new crank seal within minutes of use. Thread starter MajorMotion; Start date Apr 7, 2020; 1; 2; Next. I carefully wiped off the isoflex around the bearing, and packed new in. Was hoping I could get to it behind bearing retainer plate inside clutch cover, but appears bearing is pressed into case. Once you split the crank to replace the bearing the outer bearings will have had a bit of strain when you remove them . lifeTwo strokes tend to smoke a lot. By motox331, Kawasaki 2 Stroke ; 2001 KX250 Crank Bearing and Seal Replacement Theme . Coated on all sides for a superior seal. Remove the nut from the end of the crank and then the primary drive gear. If you want to do the job yourself you need specific tools and a jig . Next Last. I found oil in my power valve. I’m replacing a damaged oil seal behind the flywheel of my ‘78 Yamaha DT175E enduro bike. . remove the flywheel,remove the cam drive sprocket. I've looked around the web about this issue and it seems most people have oil leak into the Apr 20, 2019 · 77 RD400 Crank Seals (solved) & Rotor Removal (solved!) Started by motodreams, April 20, 2019, 06:03:41 PM. The seal on the magneto side (left side) prevents air from getting into the combustion chamber. Sep 8, 2009 · As said, a sideline repair for the cranks seal is smashing it in. Be gentle and don’t damage the new seal. It also may keep the oil mist in the fuel from properly lubricating the internal parts. Can I just remove the 4 bolt that hold the house in place. gamsgo. I then looked at the injection check valves. Nov 24, 2013 · 2 stroke Crankshaft seal replacement repair. youtube. 1 of 2 Go to page. Acording to the part diagram it look like there a seal housing and 2 oil seal . 0 Members and 1 Guest are viewing this topic. Tighten the bolt and off pops the clutch. Jetting a 2-stroke with a leaking crank seal is a lesson in futility. Feb 15, 2014 · Honda 2 Stroke ; 1997 cr 125 Crank seal replacement Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; 1997 cr 125 Crank seal replacement. I have tried messin with the carb with different jets tryin to lean it out also adjusted needle to the lowest possition possible (highest clip possition) and it helped a little but still smokes a little. Using a slide hammer to remove a crankshaft seal, shift shaft seal, or any other type of oil seal from the engi. There's no real news there. Dec 8, 2013 · Lubed the seal with 2 stroke oil,or any thin lube will work. Jan 14, 2021 · Either way, never a bad idea to replace crank bearings & seals on a 2-stroke. Jan 16, 2014 · Yamaha would get a fresh supply often, the warehouse would keep so many in stock and when they hit a certain number a supplier is notified and seals ship in a week, Yamaha would not keep 30 years worth of seals in stock as they don't really make any parts anyway, they put that on the supplier, if a supplier cannot supply the warehouse when they Apr 11, 2004 · Re: Lower Crankshaft seal bad?? On a 2-stroke the crancase is a part of the air/fuel mix flow's way to the combustion chamber. Lubricate Crankshaft seal replacement. Step 6: Install the new crankshaft seal. per-crankshaft-seal-on-a-25hp May 20, 2020 · A proper repair would be new inner crank seals as the seal lip is eventually going to fail from wear as all seals do. Nov 14, 2016 · Marine Pump Replacement Parts A sealed crankcase is essential for two-stroke operation, especially at cranking or slow speeds. I was following the Rocky Mountain YouTube Nov 26, 2020 · On 2 stroke dirt bikes, there is a rubber seal on either side of the crankshaft. All was going well then I ruined 2 right side crank seals because the lip was rolling over when pressing the crank back in the right case. Mar 8, 2025 · Welcome to 2 STROKE WORLD . The lower seal is easy to change as it's in the crankcase head, which comes off with three bolts. Can get at seals quite easily from outside. The spring was still on the inside of the lip Jun 20, 2003 · While sitting unused (not running) the oil can seep into the crank (past the right crank seal) which causes a lot of smoke to exit the tailpipe for the first few minutes after starting it. Jan 30, 2021 · This question relates to the installation of crankcase oil seals in a 2 stroke engine, but I thought there would be knowledge available from members of this group. Just a quick video on how to change crank seal on snowmobile 2 stroke engines. Thread How tough is it to replace crank seals in this engine? H. 8 PICK YOUR SEAL. Located on either end of the crankshaft, their task on one side is to provide a seal between the gearbox and crankcase and on the other side a seal between the atmosphere and the crankcase. As you can see in the attached photos there are three raised edges with a lip that looks lik Nov 27, 2020 · This is not much of a problem, and consulting the cart’s manual can help you with the replacement. use a 1/8 drill bit and carefully drill two holes 180* apart. use #10 self tapping screws,insert screws and use side cutters to pop the seal out. Oct 17, 2016 · * VISUALLY EXPLAINED This video emphasizes the often-overlooked but critical role of crankshaft seals in the operation of 2-stroke cycle engines and how they May 29, 2019 · '79 Crank / Oil Seal: Gas Harley Davidson: Marathon crank seal: Gas EZGO: 1989 ezgo gas marathon 2 stroke will not crank: Gas EZGO: crank seal: Gas EZGO: 85 gas 2cycle crankshaft seal replacement difficulty: Gas EZGO Feb 6, 2015 · Testing 2 stroke crankshaft seals. An impact would be best for this. These seals fit all 2 stroke E-Z-GO golf carts built between 1980-1993 with the Robin/Fuji 244cc engine, both 2PG and 3PG styles. Easiest and cheapest to try. May 31, 2015 · I went through 2 seals before I got one that didn't leak. there used to be an o'ring under the primary drive gear up against the bearing, if it uses one, replace it as well. I think I'm working on a 1989 E-Z-GO with Robin 244cc, EC25-3PG I'm trying to replace both crank case seals. Should not be an issue. NicholasA. Drill some holes in the seal itself and install drywall or some other screws. I replaced the crank seals on my 3pg in about an hour and a half start to finish. This repair was done without using many special tools, 💥💥💥💥 SAVE ON NETFLIX, DISNEY+, CRUNCHY ROLL AND MORE! 💥💥💥💥 Use Discount Code 'GEARS' here - https://www. 4)remove the clutch cover. Seals are a high quality aftermarket brand. The left side seal wont suck trany oil if its shot it will just make that side pot lean. (might be able to do this with the clutch basket still attatched, maybe not) Now pull out the smal o-ring behind the collar. Oct 2, 2013 · Terdog, my jetting is a 42 pilot, n85D needle in the second clip from top, with a 170 main, and airscrew at about 2 turns out, mixing 50:1 amsoil interceptor at about sea level. Nov 22, 2008 · An often overlooked item on 2-stroke motorcycles is the crankshaft seal/s. Holley Around the block Posts: 65 Joined: Wed Jan 27, 2016 2:50 am Country: Australia Suzuki 2-Strokes: T500, 1200 Bandit, 125 Stinger, Triumph R3 Just a little trick to remove seals without splitting cases. Id pull the carb and check jets against stock and go from there. steering wheel puller. wannabes. 1) drain coolant and oil. But my flywheel came off no problem. The build of the EZGO marathon is similar to most of the models, so there is no Mar 15, 2011 · 2-Stroke Sea-Doo PWC Forum . Install the new seal to the same depth* and, if it's bad, replace the primary collar. These do require a full teardown to replace, and it is likely that if the crank bearings are toasted the crank is going to be worn out as well. That plate is what keeps the seal away from the roller bearing. Is th Apr 5, 2020 · Hi all, I am rebuilding a Rotax 122; it's a 125cc two-stroke and the manual calls for grease on the crank seals and the countershaft seal. An old and very knowledge mechanic once told me if my memory serves that it was difficult to get a proper seal putting the seal on after the crank is in the Jun 14, 2020 · Crank oil seal replacement. tokyooffroad. Pull the old seal out noting how deep it was installed in the case. Log in; Sign up 2 STROKE WORLD RD250 right crank seal replacement question. Over time these dry out. Feb 19, 2014 · 2 Stroke Replacing Crank Seals 97 Cr 125. Well after removing it looks like I'm probably pretty screwed but hoping to get some help here. But you need to split the cases. Previous topic - Next topic. I need to replace the crankshaft lower seal. Oil leaks are the most common symptom of a problem with the crankshaft seal. Share Yamaha 2 Stroke ; Crank oil seal replacement Theme . Rarely a crank seal fails unless its been sitting for a while or real old. I started with the right side and I tried using 2 wood screws placed at 9 and 3 o'clock. Then see how it runs, tune from there Yea I just don't have the tools required to do clutch an flywheel I'm getting a guy to do it will get all the tools I guess at some stage an split the engine but if i was to do the bearings aswell I may aswell do a full rebuild Jan 27, 2016 · A. Then remove the gear and the collar. 9 REFIT CLUTCH Jul 6, 2019 · The seals themselves are around $20 to replace. Use a seal pick to remove the old two-stroke crank seal. Started by oldguyRD1964, February 19, 2020, 10:36:46 AM How to replace a leaky left crank seal on your 2 stroke - Subscribe for more content: https://goo. You can replace the crank seal on an EZGO marathon by following the steps mentioned above, and there should not be any problem. It's position sensitive, and sometimes tempurature sensitive. If not tight the cylinder will not fill/exhaust properly which will lead to reduced perfomance and other running related issues. com/produ Mar 12, 2019 · 2001 KX250 Crank Bearing and Seal Replacement. Check the condition of the reeds. Again, if it has one. Crank Seals and Compression. Or can i just replace the seal without taking the motor out The tools that you will need to complete the job are pretty standard for the most part. If the crankshaft seal dries out, cracks, or breaks, it can cause an oil leak. Started by oldguyRD1964, February 19, 2020, 10:36:46 AM. On a 2 stroke dirt bike, the seals on each side serve different functions and involve slightly different processes. Tokyo Offroad Crankshaft Oil Seal Press Tool:https://www. Dec 30, 2012 · This is where the impact comes in to play. It seemed like if it leaked, it was probably rather slow. It didn't budge. crank seal replacement crank seal replacement. gl/3rvMr92 Stroke Left Crank Seal Replacement (Yamaha DT175 Sep 17, 2014 · On 2 stroke dirt bikes, there is a rubber seal on either side of the crankshaft. I agree - but I was of course assuming that all the basics (fuel to carb, carb cleanliness, spark, etc) were addressed prior to checking seals, that's the path I generally take - if You're starting from nothing generally those are more likely culprits than the crank seals. The crank seals on a 2 stroke are the weak point on the motor,if they start to leak you suck air and create a lean condition and the motor siezes. Real Yorkshire no cost method! Jan 27, 2009 · The tranny side seal can let in air or tranny oil, making the bike alternately run lean, then rich. The other crank seal under the ignition cover can leak air. It can happen fast and easy. net The 2-Stroke Garage Turning Wrenches RD250 right crank seal replacement question. No problems there, Both of them held just under 2 pounds of pressure with zero loss in 24 hours. I pulled on them in rotation with no movement. 2)Remove the exhaust header, kickstarter, and disconnect the rear brake. May 23, 2013 · I used basic hand tools, a couple picks, a seal puller (optional but really helped) and a flywheel puller (not sure if required but it was only $10 in addition to the crank seals that i got from Rocky Mountain ATV MC). Jan 6, 2016 · Servicing the crankshaft seal according to the recommended service interval can prevent the seal from failing in the first place, which can cause other problems. Light Mode Nov 13, 2014 · When you install new seals (always use OEM) the castellations go towards the bearings, and oil the crank journal or seal. So, it was definitely looking like crank seals were the culprit. Feb 23, 2015 · Buy EZGO Crankshaft Oil Seal - 2-Cycle Gas Golf Carts Built From 1980 To 1993: Crankshaft - Amazon. Everything is going well so far and I went to my local KTM dealer (Thousand Oaks powersports) and had one of their old school 2 stroke guru's pull out the "vintage" exploded view parts sheet for me. Light Mode (Default) Dec 3, 2023 · I have a 2001 Ktm 125 SX. com/partner/JmWGqNWelcome to Using a well known technique for removing a crankshaft seal from the crankcase without having to take the engine apart - MacGyver style!Donations accepted at This video shows how to change the crankshaft oil seal on a KTM 2017 250 EXC. Mar 5, 2011 · Yeah , got an `86 tecate starting to do the same thing ! What my queston is does it start suckin oil from the bottom end and burning it up thru the piston ? I got the same smoke and it smells like motor oil not 2-stroke oil ! Crank seals are the only thing i didn`t replace ! Now , can i do them without splitting the cases ? So I am almost certain that my left side crank seal is leaking on my 03 RM 250. How to replace a leaking crankshaft seal on your car, DIY with Scotty Kilmer. com/ Mar 21, 2014 · Just want to see what best method is. Cut down a 2"(I believe )pcv pipe,using a large washer and clutch bolt to press the seal in. Feb 23, 2020 · Alan H Moto GP Posts: 3248 Joined: Thu Feb 16, 2012 11:50 am Country: England Suzuki 2-Strokes: 4 x GT550s - J, M, A, B. Try to move the crankshaft up and down (with a screwdrivers help) when you have the engine cover down. Is there a specific way of removing the seal (tools etc) and driving the new one in? any help or tips would be greatly apprieciated. In short, the cause was the oil leakage from the outside of the oil seal. Jun 1, 2021 · The oil seal had become thin or shrunken, and the press fit of the oil seal was loosened and it came out of the crank case. Next I placed 2 more screws at 12 and 6. Make sure the engine e cases are clean and then grease and fit a new seal in place. I do my own work so I have no idea what a shop would charge, but depending on how difficult the flywheel is to remove it could be a couple hour job or a 10 hour job. And suprisingly it is not reverse threats so keep that in mind. It does require removal of the brake pedal. B May 28, 2006 · The following it the process i used to change the right side crank seal on my 2003 RM125. I haven't seen a change in coolant level but I think I need to replace the right side crank seal and the water pump seals. After installation of the seal I used a syringe and added a small amount through the capped port. #387 in Automotive Replacement Crankshaft Seals: Date First Available : Jan 28, 2024 · Additionally, for two-stroke engine enthusiasts, the ThumperTalk forum offers valuable insights into diagnosing and addressing crankshaft seal issues, such as fouled plugs and trans oil leaks. TOOLS I USE:Engine Tachometer - https://amzn. If your en Jun 5, 2020 · Here we fix the 2001 Cr125 with a bad crankseal from my previous video. Aug 18, 2014 · My sons 2002 KX 65 is loosing transmission oil and its getting water in it as well. The objective is to try and hook onto the seal, between the seal and the crankshaft, and pry it loose. Go. i did the same thing broke my flange right off at the header and bent my fatty so it was leaking i thought that was my problem. Use good grade moly grease on seal lips before install. May 10, 2009 Sep 28, 2011 · no doubt man. Jan 17, 2014 · I don't know where you're getting a 3cyl 2 stroke crank rebuilt for $250 maybe 3 times that to do it right. Thanks for an useful input. This is the first time I have ever replaced seals on a 2 stroke vintage Suzuki T500 Titan motorcycle. If the seal on this side goes bad, you’ll get air leaks. and i still have the problem. How to remove and install 2 stroke crankshaft oil seals. How does a 2 stroke bottom end get lubricated? A 2 stroke pulls air fuel down into Jun 28, 2013 · However, the crank seals rarely fail by themselves, and the most common cause of a leaking crank seal is worn crank bearings. May 9, 2009 · EZGO Gas 2 Stroke . Properly welded, I'll put the stock crank against any brand of crank out there, they're that tough. Hey all, I split my cases today to replace the water passage O-ring. What I found was that the crank bearings still felt nice and tight, but the lip on the seal had completely lost it's elasticity and the rubber felt harder than normal. An easy way to test any two stroke crank seals with only a bicycle pump and an old inner tube. So you can replace the o ring and the bushing by simply taking the right side motor cover off. Replacing the tranny, or right hand seal doesn't require engine removal. Jan 30, 2019 · EC25-3PG seal replacement Gas EZGO. It may take several attempts at different positions to fully release the seal. But that seal would more likely suck the trans fluid into the lower end of the R cyl and cause that cyl to smoke like hell. As far as crank true and welding, for a stock it's a must in my book, especially since you're going to have it torn down the far anywho. net. The seal on the magneto/left side keeps air from getting into the combustion chamber, while the seal on the clutch/right side keeps crankcase oil from getting into the combustion Check out our line of Enduro Helmet chin mounts for action cameras - https://shop. Careful not to lose the woodruff key. While it's apart do them all for piece of mind, oil pump, water pump, shifter shaft, output shaft, kickstart. Next Last Bad crank seals Oct 3, 2008 · Yes you do. Mar 7, 2013 · - Shaft seal ring (outer seal) - O ring (inner seal) - Bushing - Metal plate The main output gear, pushes against the bushing and into a metal plate which creates an inner seal. Mar 15, 2010 · Easy, pull off the crank drive gear. after i rev the bike coming back down off the rev it lets out 2-4 little tin tin tin tin noises with lil pufs of smoke with each one. While its running you'll be getting more oil to the engine parts but it won't change the jetting (rich/lean). EZGO marathon crank seal replacement. ill replace the seal and see whats Jun 14, 2010 · The upper seal is easily changed by removing the flywheel and magneto plate, I ran a deck screw into the seal and then pulled it out using a claw hammer and a short 1x2 piece of wood against the block to protect it. I replace them every year or two on my two stroke mx bikes. Yes, I was using grease on the crank and seal. Honda 2 Stroke ; CR80 Crank Seal replacement help Theme . Oil leaks. However, it doesn't specify which type. I also have a repair manual but it not clear on how to replace it. Jul 25, 2018 · The replacement seal is shorter than the seal that was in there. Bike will run lean and trying to tune it will be pointless. So I was wondering if i have to take the motor out of the frame and take apart the motor to replace the crank seal. From this you can tell I have NOT bought a manual YET ? I did do a search and couldn't find any anwers on my model. I am getting small amounts of premix in the ignition side of the case, and that is the only thing I can think of to cause it. Your idle will hang and/or the bike will rev erratic randomly. These community-driven discussions can provide practical solutions and troubleshooting tips for specific engine models . A torque wrench, a collection of pliers, multiple sizes of flat head screwdrivers, box end wrenches, torx bits (and driver), a scribe, allen keys, a breaker bar, sockets with ratchet and extensions, a set of clutch pliers, and a dead-blow or rubber hammer round out the standard stuff. Nov 7, 2010 · Re: Crank seal replacement is getting old! Running a 2-stroke engine with air leaks (like bad crankshaft seals) will make it run lean and run hot. Light Mode (Default Feb 22, 2024 · Here is a step-by-step guide on how to replace a faulty crankshaft seal. Anyway,the only seal that would vent into the trans would be the RH side behind the clutch cover which can be replaced without total teardown on most bikes. This week we're talking how to change your crank seals without having to pull the whole engine apart. <br /><br />Strange, however, that no oil or fuel is visible as the crancase pressure would force a little amount out if the seal is not tight? Nov 15, 2012 · 2 stroke. Thread starter NicholasA; Start date Feb 19, 2014; 1; 2; Next. Jul 21, 2023 · DVPARTS 2PK Crank Crankshaft Oil Seal for EZGO 2 Stroke 2PG & 3PG Golf Car Cart 1980-1993 . By MariusMei, June 14, 2020 in Yamaha 2 Stroke. 5)remove the pressure plate, and disks from the clutch. Craig is probably right that the centre seals are gone as well if it is still sucking oil after changing the right side seal. Mar 28, 2011 · You do not have to split the cases to replace the crank seals on either side of the motor. Some people like to use a drill to put a small screw in it and pull on the screw with pliers. I drilled pilot holes and turned in the screws. Jul 25, 2016 · Since my 2007 CR250R has been down while I waited for a new stator I decided to replace the crank seals. Gas EZGO. Feb 19, 2016 · Had a day off work today so I decided to take on my crank seal issue that I think is culprit to excessive smoke and gear oil loss on my 90' 300mx. Do I have to split the block to replace the seal. Become a Member of our Channel: https://www. i put a new flange o ring and hitemp on it sealed it up. Is there a way to peen it in place or some sort of adhesive I should use to hold it in. Before beginning the replacement procedure, ensure that you have the following tools and materials: Socket set; Torque wrench; Pry bar; Screwdrivers; Replacement crankshaft seal; Engine oil; Clean rags; Step-by-Step Replacement Procedure Oct 22, 2008 · well my 2005 yz 250 started smoking and using gearbox oil (as i wasnt getting 750ml out!) so i am in the process of replacing the right hand side crank seal. Using a seal puller, gently pry the old seal loose from the crankcase. to/3TE48GZ Mityvac Pressure & Vacuum Tester - https://am Hmmm, if the centre crank bearing and seal have had it then prepare yourself for a full crank rebuild . com FREE DELIVERY possible on eligible purchases Sep 30, 2019 · One set of two crankshaft seals that fit 1980-1993 E-Z-Go Marathon 2 stroke gas golf cars. 3)disconnect the rad hose from the clutch cover. Light Mode (Default) Apr 16, 2012 · If its only the crankseal you get away with just changing the seal. Outside of seal is flush with the case when properly Aug 29, 2016 · Step 5: Remove the old crankshaft seal. The flywheel you'll see 2 holes are there may be 2 Phillips screws to remove to protect the threads across from each other about 2" apart that's where your puller bolts are going to be used with your puller ie. Also it's a good idea to replace the steel collar that goes around the shaft and contacts the seal. Feb 27, 2017 · After watching many videos that demonstrated how easy replacing crank seals are I went ahead and tackled it. 6)remove the pushrod and Aug 6, 2022 · It did work! Just got back from my test ride! Probably took me 2 hours from start to finish to do but I've had this bike apart so many times Hope this get 1 day ago · 2 STROKE WORLD . A tiny movement up and down means you need to do the roller bearings also and than means splitting engine. Thread starter REVHARD215; Start date Mar 15, 2011; Status Not open for further Nov 28, 2012 · seal replacement is not covered except for a tear down. Location: The Republic of South Yorkshire Apr 7, 2020 · EZGO Gas 2 Stroke . I find it hard to believe all of these are leaking from around the OD of the seal and it's not just the 787's that have leaking inner crank seals, it's all the rotary valve models the suffer from it at some point. Tools and Materials Needed. If the seal starts to go in crooked it's ruined because the edges around the back of the seal will bend and cause leaks. carefully clean and inspect the crank seal surface. haha. Took it apart, ordered a new seal and but Sep 24, 2017 · Changed my oil and only got 600ml out of it, but there were no external leaks so I new I was burning oil through the crank seal. hgm diiei azxgzgp smxjuli mrkx uulfa kcoj znwhvdrd kvjx srsbm vrr bwxey mwj fkyu bsmpvl