I need to do a compression test. Is the $20 harbor frieght tester OK.
compression tester
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With the cheap ones it is good to remember that the actual value is less important than the relation betwen the readings. i.e. you don't want to see anything more thatn a 10% variation across the board. I also find that it works best if you take three readings on each cylinder and average them as it helps to minimize 'experimental error'.
Other than that read up on how to do a proper compression test as detailed by several folk on here.Comment
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I have one almost exactly the same and it works great!
DR-Ethan
1966 2a 88' Pickup
1966 2a 109' Pickup
2002 F550 7.3l
1997 f250 7.3lComment
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