Rear Crank Seal Replacement
#1
Rear Crank Seal Replacement
I have to replace the rear crank seal on my SC engine (Super V8, MB transmission). I am thinking of doing it with the car on the ground, raised just enough to have space to work underneath. I plan to (if necessary) completely remove the prop-shaft (and do everything else as required for transmission removal), lower the transmission (using two scissor jacks) sufficiently down and move it back (keeping it still under the car). Will I then be able to access and remove the flex plate and replace the rear crank seal? Has anybody done it in this way?
#2
I have replaced many rear main seals on these engines, however I have never replaced them on the ground. I will say this, more often than not, the leak is more often from the 17mm Allen plug directly above the team main. It's the exact same seal as the one for the supercharger coolant cap seal. Make sure you replace that as well. I would also use some P'Blaster on the exhaust manifold nuts and letting them soak for awhile. You'll save yourself a lot of work later on.
#3
Before I start removing the transmission, I will jack-up the car and do some measurement / judgement of the space in the tunnel around and behind the transmission to assess how much it can be moved backwards (when lowered somewhat).
#4
Hello colleagues,
unfortunately the rear crankshaft seal of my XJR from 2000 is leaking more and more. Could you explain, what is meant with your very useful info regarding the possible additional leak of the 17mm Allen plug directly above the team main? I do not understand the terminology "team main", sorry.
How long will it take to remove the transmission or is there a trick to not remove it completely?
Many thanks in advance!
unfortunately the rear crankshaft seal of my XJR from 2000 is leaking more and more. Could you explain, what is meant with your very useful info regarding the possible additional leak of the 17mm Allen plug directly above the team main? I do not understand the terminology "team main", sorry.
How long will it take to remove the transmission or is there a trick to not remove it completely?
Many thanks in advance!
#5
Glad you pointed that out. What I meant to say back then was “rear main”.
This seal pictured below fits in 3 spots.
The first is on top of the supercharger lid that has a 19mm Allen bolt.
The second is on the left hand side lower section of the engine block that acts as the block coolant drain. I believe it’s a 17mm Allen bolt.
The third is above the rear main seal that has a 17mm Allen bolt and engine oil is behind that one. In my opinion, this non-moveable seal leaks more often than the rear main seal that has a moving part. Go figure that one out!
Take your time with that top banjo bolt on the transmission for the oil cooler. There’s 2 copper washers and that bolt is easy to cross thread in the transmission so be careful!
As stated early on in this thread, PBlaster the top nuts for the catalytic converters and let them get to ambient temperature before using a deep well 13mm wobble socket, long extension and a ratchet. No power tools on these unless you like to replace broken studs.
This seal pictured below fits in 3 spots.
The first is on top of the supercharger lid that has a 19mm Allen bolt.
The second is on the left hand side lower section of the engine block that acts as the block coolant drain. I believe it’s a 17mm Allen bolt.
The third is above the rear main seal that has a 17mm Allen bolt and engine oil is behind that one. In my opinion, this non-moveable seal leaks more often than the rear main seal that has a moving part. Go figure that one out!
Take your time with that top banjo bolt on the transmission for the oil cooler. There’s 2 copper washers and that bolt is easy to cross thread in the transmission so be careful!
As stated early on in this thread, PBlaster the top nuts for the catalytic converters and let them get to ambient temperature before using a deep well 13mm wobble socket, long extension and a ratchet. No power tools on these unless you like to replace broken studs.
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earny (04-02-2021)
#6
Check out my thread on my transmission swap, it's got a few pictures that explain exactly which seal is mentioned https://www.jaguarforums.com/forum/x...n-swap-239946/
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earny (04-02-2021)
#7
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#8
Of course, I replaced the crank seal as well. There is no way of knowing whether the leak is from the plug or from both since the plug sits above the crank seal. And you don't want to have to go in there again.
While I had the leak, I could smell strong burning oil smell coming from the car every time I parked. The oil was dripping on the exhaust, on the flexible (mesh) portions of the pipes. After fixing the leak, the smell continued for the next couple of weeks - until all the oil that had soaked into the mesh burned out.
#9
#10
#11
I don’t know if they deliver to Germany but this is where I’d get mine from.
I’m not sure if they have this available aftermarket. If you are having a hard time getting this seal, I’d reuse it by putting thread sealer (Teflon tape) on the Allen bolt threads and a small bead of silicone on the contact surface where the seal meets the block.
I highly recommend using Corteco rear main seal because it comes with an install tool (not pictured) already mounted inside the new seal. It makes the job a lot easier. The only thing is I use a lubricant on the install tool so the lip of the new seal doesn’t roll under itself while pushing the seal towards the engine.
You could also search for these parts on eBay Germany.
I’m not sure if they have this available aftermarket. If you are having a hard time getting this seal, I’d reuse it by putting thread sealer (Teflon tape) on the Allen bolt threads and a small bead of silicone on the contact surface where the seal meets the block.
I highly recommend using Corteco rear main seal because it comes with an install tool (not pictured) already mounted inside the new seal. It makes the job a lot easier. The only thing is I use a lubricant on the install tool so the lip of the new seal doesn’t roll under itself while pushing the seal towards the engine.
You could also search for these parts on eBay Germany.
Last edited by Addicted2boost; 04-07-2021 at 06:01 AM.
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earny (04-07-2021)
#12
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David N. Warner
XJ XJ8 / XJR ( X308 )
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