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I did a compression test on my luv today and heres what I got.Cyl.1 (75 psi),cyl.2 (78 psi),cyl.3(72 psi),cyl.4(78psi).is it time for a rebuild or is that normal?

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1975 V8 Luv
1980 Bagged Luv

According to haynes manual it says for a series 5 and 6 the compression pressure should read 170.64 , with maximum compression variance of 8.53 psi. To me that sounds really high... I was thinken that they should run mid 70s . I did a compresion test on my 80 before i rebuilt it.. reading on compression#1--34lb...i didnt need to check any of the others after that!! Maybe i should check it now that i have rebuilt it...Man it is nice to have a good runing engine!! Good luck Dan.

Is the motor running bad or is it just weak power? Do you have a lot of blow back comming into your air cleaner? Is it knocking? As a general rule, if you have basicly even compression readings, you should be ok. Try adjusting your valves if you haven't done so already.

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Previous setup: 4.1 Buick V-6/TH 350
Current setup: 400 Small Block Chevy V-8/TH 350
9" ford rear end/short bed/blue
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