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misfires V70-XC70 2000

posted by  Kentucky on  Fri Sep 5 15:22 CST 2014
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last visit: Tue Sep 30 13:01 CST 2014
[RELATED]

Did you do that compression check on a warm engine or after it had been sitting for a while?

When I did my timing belt, I was also replacing the spark plugs. I decided since I had them out, I would check the compression. The car had not been started for several days. When I checked it, I thought I had somehow bent valves during the job since compression was wide ranging with one down to 80 psi.

I went ahead and started it and warmed it up and ran the compression test again. All cylinders were 195 to 200 psi. I suspect the car has hydraulic cam followers that had bled off while sitting, but I never verified that to be so. Are they hydraulic?

Charley






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