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You guys mentioned a head gasket shim before and my compression was pretty high so I am wondering if it may make sense to use one this time. Do you recommend using one? I do not know the exact amount the machine shop took off the top of the block when they decked it. If I do use one does reduce the life of the HG or have any other negative effect? What sealant do you use between the block and the shim?

Thanks
Alan
How high was your compression? I had 175 on all 4 and had to use 92 octane to reduce pinging. It's been running great for over 2 years. My guess would be the head gasket you used. I have been doing good with felpro.
 

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Discussion Starter · #582 ·
How high was your compression? I had 175 on all 4 and had to use 92 octane to reduce pinging. It's been running great for over 2 years. My guess would be the head gasket you used. I have been doing good with felpro.
It was as high as 190 psi but I did use the crappy gasket.
 
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