90 GTU engine compression?
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From: California
90 GTU engine compression?
Hi all. What is the minumum compression reading for a healthy 1990 Non-Turbo GTU Engine? In addition, the compression reading of my current engine is #1) 80 and #2) 95 How is this reading? Lastly, what is the recommended oil viscosity for the 1990 13B non-turbos?
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Joined: Mar 2003
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From: Montana
min. is 75 any lower than that and it is about gone. The compression is ok if it starts to vary more than 25 psi then you will start to have problems. You can look at websites and they will give you more info. RacingBeat.com
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