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Oil leak

S

Stewart Sadler

New member
Joined
4 Sep 2003
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16
I saw a post a while back about a common cause for an oil leak on a 993, can't seem to find it now. Some sort of seal or something. Can someone give me the name and where it can be found.



Cheers,

Stewart


Migration info. Legacy thread was 11533
 
Leaks from cam cover gaskets/seals are quite common. Also main bearing seal can leak at high mileages .

Migration info. Legacy thread was 11536
 
One of the most common oil leaks originate from the lower valve cover gaskets. These gaskets can be replaced for approximately £15 each. There are 2 lower gaskets and 6 upper gaskets. However, oil leaks will most likely come from the lower gaskets.

Here are instructions on how to replace the lower gaskets.

There are about a dozen Allen head screws holding the two valve covers on. A couple of them are hard to get to but with patience you can do it. Some have said that the heat exchanger must be removed to take the covers off, but others have done it without taking them out. Once they are all out pull off the valve cover and you'll see the gasket in a groove the goes around the perimeter of the head and between each of the cylinders - it's one piece.

Take out the old and install the new - replace cover and tighten each Allen screw ONLY until you feel it start snug up. Get them all to this point and then turn each one 1/4 turn more.

Most times the problem with leaky valve covers is over tightening. When you look at the gasket you'll see that the seal is made by two ridges that run all the way around the gasket. If they get over compressed - it leaks! So you want to tighten it snugly but don't torque the daylights out of it.


Migration info. Legacy thread was 11540
 
Graham,

I have the same issue and am still considering the DIY option. Do you know if you need to drain the oil when you change the gasket ?

Thanks


Migration info. Legacy thread was 11588
 
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