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View Full Version : crankshaft seal leak between seal and sump cover, hard to change?



Marko R1
25-07-2014, 08:17 PM
Sorry mods for the double post but I can't change the subject line...my crankshaft seal is leaking between the seal and the sump cover, is it hard to change this seal? I just wonder if it's possible to drop the sump whilst engine is in the car?

peaandham
25-07-2014, 09:41 PM
If its the crankshaft seal, no you will need to remove and refit the timing belt

Madmagna
26-07-2014, 06:46 AM
I assume you are talking about the rear main seal as the front oil seal has nothing to do with the sump. If is the rear main seal either the motor has to come out or the trans has to come out to get access, removing the upper sump will do nothing. The leak would be the seal between the crank and the seal leaking due to wear or the seal having gone hard

Marko R1
26-07-2014, 09:27 AM
Sorry for the confusion, the seal I'm referring to is the front seal which sits behind the harmonic balancer ...

Marko R1
26-07-2014, 09:34 AM
Here is a pic of the leak. Seeping between the crankshaft seal and the sump...could it be the sump gasket or do they only run a sealant?
I did wipe it clean and it started leaking again almost instantly...

http://i61.tinypic.com/2bnznb.jpg

Magna diver
26-07-2014, 09:49 AM
Is the seal. Check the camshaft seals to see if they are leaking as well then check the crankcase breather system to make sure it's working properly as a defective/blocked crankcase breather system will pressurise the crankcase & cause oil leaks.

Marko R1
28-07-2014, 06:11 PM
Thanks. How do I check the crankcase breather system?

Magna diver
29-07-2014, 06:31 AM
On the front rocker cover adjacent to the cam belt cover is the crankcase breather valve. With the engine shutdown do the following:
Pull the valve from the rocker cover, take the hose off the valve then check to see if it allows flow in one direction only. No flow or flow in both directions = breather valve not working properly & replacement required from local supplier/wreckers etc.
Both rocker covers also have rubber hoses fitted to the opposite end (gearbox end of engine) which form part of the crankcase breather system. These can clog up with carbon deposits and affect the system. If clogged take care when removing for cleaning as the hoses age harden and may break/crack during removal.
The rocker covers themselves also have an internal baffle system where the hoses connect. These may also have some clogging so is worth checking for free air flow by attaching a hose and blowing back through (2 psi max air pressure with engine oil dipstick removed). IF clogged then remove rocker covers for further inspection/repair action.

Note: Most of the problems I have seen involve the breather valve and the hoses due to carbon build up.

Cheers

Marko R1
29-07-2014, 06:53 AM
^ this is very helpful, thank you for the taking the time to explain the process, very much appreciated :)