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1998 Toyota Corolla Extensive Engine oil leak in my car

Tiny
SPEEDGEAR2
  • MEMBER
  • 1998 TOYOTA COROLLA
Engine Mechanical problem
1998 Toyota Corolla Front Wheel Drive Manual

Hi, I seek your advice to solve my engine oil leak. Mine is a Toyota Corolla 1998. Engine Oil is leaking leaving traces at chain cover, tappet cover, and from a few more places. I have tried changing sealing for tappet cover and crank cover but to no avail. I have this strong feeling that the crank breather pressure has increased abnormally due to which oil keeps leaking out.

Please note that the oil does not leak when the engine is off. Only when the car drives, the engine oil leaks extensively, so much that the oil level comes down to about 60% every second day. I am sort of sure after reading the forums that its the crank pressure. What could be the causes of it and how to solve Kindly advise. Really appreciate you help.

Speed.
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Monday, June 16th, 2008 AT 11:16 PM

4 Replies

Tiny
AIRSOFTSOLDRECN9
  • MEMBER
  • 348 POSTS
PCV valve needs to be replaced, and the line runing to the manifold needs to be under the proper operating vacuum; if changing the gaskets and seals are not working. The crankcase is designed to be under vacuum and not pressure since blowby gases exert a significant amount of pressure on seals (particularly oil pan and rear main).
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Monday, June 16th, 2008 AT 11:50 PM
Tiny
SPEEDGEAR2
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Thanks for the quick response. I have tried changing the PCV valve as well but this doesnt help. Any other suggestion / advice would be highly appreciated. Thanks.
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Tuesday, June 17th, 2008 AT 12:00 AM
Tiny
AIRSOFTSOLDRECN9
  • MEMBER
  • 348 POSTS
If you are recieving a significant amount of blowby this can cause too much pressure in the crankcase. Does the crankcase smoke while it is running. Have you tried a compression check on all cylinders? The only other thing is a possibly cracked block, so take it to a shop to have it magnafluxed (a powdered UV die which illustrates any fatigue in the metal). Make sure a shop does the check and are familiar with the proceedure; these people are trained to scope this sort of thing out. You can however buy it at the local parts store.
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Tuesday, June 17th, 2008 AT 8:24 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi speedgear2,

There is a hose leading from the valve cover to the intake hose. It should be fully or partially clogged. Clear it and you should solve your problem.
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Wednesday, June 18th, 2008 AT 9:05 AM

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