Chip Posted June 8, 2004 Share Posted June 8, 2004 I was thinking of doing a compression test on my 98 O/B until I got a good look at how much,(how little), space there is around the plugs. I wanted to do one test cold and another one hot to see how much piston expansion there is. I've probably got the worst case of piston slap you've ever heard ,(when cold). I've got 200,000kms on it but oil consumption is very low and there still seems to be a fair amount of power,(at least for a Subaru). Has anyone done a compression test ?? How hard, or easy, is it to do with the limited space ? Quote Link to comment Share on other sites More sharing options...
99obw Posted June 8, 2004 Share Posted June 8, 2004 I have had a compression tester on #1 to find TDC. It's not too bad. I prefer to do anything relating to the plugs from underneath with the car on ramps. #4 might be a pain.I don't think a compression test will tell you much. The slapping is because of the (lack of) skirts, and the compression rings are at the other end of the piston. Quote Link to comment Share on other sites More sharing options...
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