Analyze my compression test please!
#1
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Analyze my compression test please!
I own an Ap1 with 169000km on it (105kish miles) and I've been debating between going turbo, or selling the car and getting a lower mileage one and then going turbo.
I did a compression test, and these were the results:
Back to front
Cylinder 1: 260-260-260
Cylinder 2: 240-240-240
Cylinder 3: 240-245-245
Cylinder 4: 245-250-245
I've had a valve adjustment done within the last 5000kms
What's up with Cylinder 1? Should I be concerned, or just run something through the car to try and clean the cylinder of any excess carbon buildup?
Cylinder 1's plug had a little more carbon than the others...
Thanks guys
I did a compression test, and these were the results:
Back to front
Cylinder 1: 260-260-260
Cylinder 2: 240-240-240
Cylinder 3: 240-245-245
Cylinder 4: 245-250-245
I've had a valve adjustment done within the last 5000kms
What's up with Cylinder 1? Should I be concerned, or just run something through the car to try and clean the cylinder of any excess carbon buildup?
Cylinder 1's plug had a little more carbon than the others...
Thanks guys
#4
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Do it again, start with cylinder 4. see if your numbers change. high compression usually means excessive oil in the rings, or fauly reading. Carbon COULD cause it, but that is highly unlikely.
#7
The fact that it's consistent is good, and while your variances aren't "perfect", they're within OEM specs. Cyl 1 reading high is weird, but things could be worse.
Drive the car a bit and do the test again. Maybe an exhaust valve of Cylinder #1 isn't opening all the way? It could also be oil, or carbon buildup. I'd bet it's carbon buildup.
Drive the car a bit and do the test again. Maybe an exhaust valve of Cylinder #1 isn't opening all the way? It could also be oil, or carbon buildup. I'd bet it's carbon buildup.
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#8
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The fact that it's consistent is good, and while your variances aren't "perfect", they're within OEM specs. Cyl 1 reading high is weird, but things could be worse.
Drive the car a bit and do the test again. Maybe an exhaust valve of Cylinder #1 isn't opening all the way? It could also be oil, or carbon buildup. I'd bet it's carbon buildup.
Drive the car a bit and do the test again. Maybe an exhaust valve of Cylinder #1 isn't opening all the way? It could also be oil, or carbon buildup. I'd bet it's carbon buildup.
Car runs perfectly btw guys.
#9
There's probably a reason for it. Fix that reason, and eventually the carbon will get burned off. You could try a steam cleaning or sea foam, but I've always been wary of putting fluids other than gasoline in my engine. Sea Foam would be my choice between the two.
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