Quote:
Originally Posted by HarryCarry
I'd like to figure out what went wrong with the plugs before installing new ones.
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Not hard to figure out. Your subsequent statement gives us the answer...
Quote:
Originally Posted by HarryCarry
They're Autolite brand.
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You unfortunately used inferior quality GPs, known early failure, and worse; for breaking up and wreaking havoc inside the combustion chamber, and, if the pieces migrate into the cylinder, cause further problems there. Lucky for you you did not run them long enough for serious problems.
They mushroom (as you have noticed) and then start to break apart. The schrapnel bounces around the system...
Stay away from Autolite and Champion GPs (two of the worst). The only good quality GPs we have found are the Bosch.
Quote:
Originally Posted by HarryCarry
Just ordered six more.
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Six more Autolite? Cancel the order and get Bosch.