So I ended up having to replace a timing belt on my 2002 protege due to a failed tensioner and water pump. After doing the job, the car wouldn't start. to diagnose, I decided to perform a compression test as one of the steps. I got back some odd numbers compared to prior tests and am curious as to what could cause these odd numbers. results are in order from cylinder 1 to 4.
Results at 160k miles: 157, 152, 158, 165
Results at 210k miles: 149, 143,148, 159
Results at 240k miles: 138, 90, 141, 179
After getting the low number on cylinder 2, I decided to pour a spoonful of 2 stroke oil into the cylinder to see if the number would go up. It continued to register the same indicating to me, it is probably not a problem with the piston rings.
I know the valve stems are bad on cylinder 2 and 3 due to oil in the cylinders and on the spark plugs after sitting over night.
So a couple questions.
1. How would cylinder 4 go up in compression:
2. Should I have tried putting more oil into cylinder 2?
3. What are some other things to test why compression seems low in cylinder 2 without having access to an air compressor for a leakdown test? or could the valve stem seals cause that much of a problem?
Results at 160k miles: 157, 152, 158, 165
Results at 210k miles: 149, 143,148, 159
Results at 240k miles: 138, 90, 141, 179
After getting the low number on cylinder 2, I decided to pour a spoonful of 2 stroke oil into the cylinder to see if the number would go up. It continued to register the same indicating to me, it is probably not a problem with the piston rings.
I know the valve stems are bad on cylinder 2 and 3 due to oil in the cylinders and on the spark plugs after sitting over night.
So a couple questions.
1. How would cylinder 4 go up in compression:
2. Should I have tried putting more oil into cylinder 2?
3. What are some other things to test why compression seems low in cylinder 2 without having access to an air compressor for a leakdown test? or could the valve stem seals cause that much of a problem?