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Home » Public Forums » GMCnet » [GMCnet] Reviving the Cad 500  () 1 Vote
Re: [GMCnet] Reviving the Cad 500 [message #165291 is a reply to message #165285] Wed, 04 April 2012 10:03 Go to previous messageGo to previous message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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Senior Member
JohnL455 wrote on Wed, 04 April 2012 08:24

Well I can say I've had most all the GM flavored engines over the years. Still have a 76 Grand LeMans with a real Pontiac 350, albiet a 2BBL. Never had a problem and in that low HP version and being a 350 out of the same block, I don't think it's possible to have it hurt itself. I'll hang on to it. I guess you would need the NTSB then to find out what went wrong wten they exploded, and that was not the real focus of the testing. I was just curious of what led to the failures and what the weak points of the Buick and Cad were. I know on the Northstars it's the head bolt creep that causes Dexcool thirst.


Although I wouldn't dismiss the results entirely, these were transmission test and we would routinely disassemble the trannies to check wear, etc. We didn't do any of that for the engines and ran them till they gave up. On the otherhand, there are engine dynamometer tests that will run at WOT for 500 hours in a similar abusive state. Usually, there was a rod flying out of the side of the block but it's hard to say what the root causes were, other than some brands were distinctly worse than others.


Bob de Kruyff
78 Eleganza
Chandler, AZ
 
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