Quote:
Originally Posted by fatbass
I'm late to the party but I love this truck. I had a '71 K10 shortie the same color scheme and always wanted a 3/4 ton to make a pair.
Is there a chance someone did something to increase cylinder pressure/ compression ratio? Wrong head gasket, pistons, poorly machined heads, etc...
In the old days of points ignition (poorly maintained) and poor gas/air filtration, carbon buildup on pistons and head surfaces was a problem to the point of causing preignition.
I would do a baseline compression check. If wildly high or erratic readings are seen, scope your cylinders to check for carbon buildup.
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I suppose there is that chance. This was my father-in-law's truck but he did sell it off for awhile. Knowing a bit of how it was used/abused for that decade I doubt there was even an oil change done on the thing much less an engine rebuild. I have been meaning to do a simple compression test, I'll put that on the list for cooler weather.