1989 Toyota Corolla Not enough compression in cylinder No1

ERVINW

MEMBER
1989 TOYOTA COROLLA

Engine Mechanical problem
1989 Toyota Corolla 4 cyl Front Wheel Drive Manual

We checked the rings that was ok, then we changed grinded the valves, same problem.
We then changed the engine Head, still same problem

Monday, May 31st, 2010 AT 3:49 PM

3 Replies

MHPAUTOS

MECHANIC
31,938 POSTS

Hi there,

do a wet compression test, add a table spoon or so of oil to this cylinder and do a comp teas, if the pressure comes up it will be a ring problem, if not valves or gasket problem, ensure that you have correct valve clearance as well.

Mark (mhpautos)

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Monday, May 31st, 2010 AT 5:18 PM

ERVINW

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2 POSTS

Hi Pro

We tested the cylinder wet and compression was the same. The engine has overhead cam so valve clearance is good, the head joint was replaced. What else should I check.

Thank you

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Saturday, June 19th, 2010 AT 4:58 AM

MHPAUTOS

MECHANIC
31,938 POSTS

Do a leak down test, this will show exactly where the leak is, you do need some special equipment to do this, but if the comp is still low, it will be a vale problem head gasket or a hole in a piston, a leak down test will prove exactly where the problem is.

Mark (mhpautos)

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Saturday, June 19th, 2010 AT 6:09 AM