The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 8.1 , broke piston , help , ideas??? Pics inside. This is not your average thread!=)

fatblockvelle · 11-05-2012, 04:23 PM

OK ... Need some 8.1 help here. I am far from a guru and dont claim i know everything... but my number 5 cyl is down on compression.... =) number number one is broke and number 7 is cracked.... has anybody ever seen anything like this before?"?? have a bent pushrod in #5 but im sure has to do with vanishing piston trick. question to you guys is... im tossing another motor in this car and i dont want to have same issues... this motor was in a bread truck and was tmu. One more question... does anybody know if gm stamps the pistons from the factory like that" or someone rehash this thing???? ??? sorry for the ramble ... THANKS FOR ANY HELP!!!!

11-05-2012, 04:23 PM	#1
fatblockvelle Registered User Join Date: Jul 2008 Location: auburn ma Posts: 216	8.1 , broke piston , help , ideas??? Pics inside. This is not your average thread!=) OK ... Need some 8.1 help here. I am far from a guru and dont claim i know everything... but my number 5 cyl is down on compression.... =) number number one is broke and number 7 is cracked.... has anybody ever seen anything like this before?"?? have a bent pushrod in #5 but im sure has to do with vanishing piston trick. question to you guys is... im tossing another motor in this car and i dont want to have same issues... this motor was in a bread truck and was tmu. One more question... does anybody know if gm stamps the pistons from the factory like that" or someone rehash this thing???? ??? sorry for the ramble ... THANKS FOR ANY HELP!!!! Attached Images