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Tom Wesenberg · 11-13-2014, 11:55 AM

Too tight of piston fit may be the cause, or it could be a build up of crud in the rear of the cooling chanber, as the rear sets lower than the front. It always seems to be #4 that locks up first. Preignition or advanced timing could also be the cause.

11-13-2014, 11:55 AM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Engine melt down Too tight of piston fit may be the cause, or it could be a build up of crud in the rear of the cooling chanber, as the rear sets lower than the front. It always seems to be #4 that locks up first. Preignition or advanced timing could also be the cause.