Low Compression ? Help~!
it might help, only one way to find out get it tested.
the reason i posted lucas is for a worn cyl it will help raise comp if rings are worn, and the reason i posted seafoam is there could be carbon build up on valve and not letting it seal correctly. you can only guess at the problem from outside the motor until you open it up.
oh an the stuff trust posted walmart carries it, ive used it before
the reason i posted lucas is for a worn cyl it will help raise comp if rings are worn, and the reason i posted seafoam is there could be carbon build up on valve and not letting it seal correctly. you can only guess at the problem from outside the motor until you open it up.
oh an the stuff trust posted walmart carries it, ive used it before
Ahh, I see. If i mixed all three of those together would that be bad?
I bought the restore 4cyl lubricant at walmart haha.
Yeah, i'm planning on giving my car an oil change tomorrow then using the 4cyl lubricant along with fresh new oil as well.
I bought the restore 4cyl lubricant at walmart haha.
Yeah, i'm planning on giving my car an oil change tomorrow then using the 4cyl lubricant along with fresh new oil as well.
Okay so the oil change along with the Restore for it made my car feel a bit nicer then how it was before.
The old oil looked ridiculously old (as if they hadn't done an oil change in a while)
Then finally i got my results for the test:
Cylinder 1: 120psi
Cylinder 2: 120psi
Cylinder 3: 60psi
Cylinder 4: 131psi
Any solutions?
The old oil looked ridiculously old (as if they hadn't done an oil change in a while)
Then finally i got my results for the test:
Cylinder 1: 120psi
Cylinder 2: 120psi
Cylinder 3: 60psi

Cylinder 4: 131psi
Any solutions?
The indicated compression pressures are considered normal if the lowest reading cylinder is within 75% of the highest.
Seventy-five percent of 131 is 98 , the highest cylinder reading is 131. Therefore, cylinder No. 3 being 60 which is less than 75% of cylinder No. 4 indicates an improperly seated valve or worn or broken piston rings.
If one, or more, cylinders read low, squirt approximately one (1) tablespoon of engine oil on top of the pistons in the low reading cylinders. Repeat compression pressure check on these cylinders.
1. If compression improves considerably, the piston rings are at fault.
2. If compression does not improve, valves are sticking or seating poorly.
3. If two adjacent cylinders indicate low compression pressures and squirting oil on the pistons does not increase the compression, the cause may be a cylinder head gasket leak between the cylinders. Engine oil and/or coolant in the cylinders could result from this problem.
Seventy-five percent of 131 is 98 , the highest cylinder reading is 131. Therefore, cylinder No. 3 being 60 which is less than 75% of cylinder No. 4 indicates an improperly seated valve or worn or broken piston rings.
If one, or more, cylinders read low, squirt approximately one (1) tablespoon of engine oil on top of the pistons in the low reading cylinders. Repeat compression pressure check on these cylinders.
1. If compression improves considerably, the piston rings are at fault.
2. If compression does not improve, valves are sticking or seating poorly.
3. If two adjacent cylinders indicate low compression pressures and squirting oil on the pistons does not increase the compression, the cause may be a cylinder head gasket leak between the cylinders. Engine oil and/or coolant in the cylinders could result from this problem.
Last edited by 94civichatchback; Jul 23, 2010 at 02:29 AM.


