Stupid question about the #8 cylinder issue...
#11
It seems like a blown head gasket because the combustion pressure inside the cylinder goes into the coolant and causes bubbles in the cooling system anong with excessive heat- over heating. It also leaks coolant into the cylinder causing white smoke and hard starting. As the crack in the block gets worse so do the symptoms.
#12
IMO, All GM built 504 turbo diesel blocks will get it eventually. If you have the GEP blocks with the 5 digit julian date code for the engine you are ok [when the military took over production and improved a few things]
My 1998 had it replaced under warranty GM Major guard. That was at 60-70k miles. I purchased the truck with 79k and had another #8 on a "fixed" GM block at 138k-ish miles. And I babied the engine and did all the maintenance to the letter.
I had a dealer drop in a new replacement engine [GEP Optimizer 6500] and all in the costs were around $14,000 out the door. About 55 hrs of labor, the engine, and a few new other things [new radiator, etc that I had done].
Telltale signs are white smoke, overheating conditions, loss of coolant, etc. There's usually no advance warning.. its just.. bam. It's there.
IMO, if I get another h1 down the road, I'd look for a 6.5 Non turbo with the 4 speed transmission. More reliable and honestly it's not that huge of a difference between a 6.5 N/A and a 6.5 Turbo.. they're both slugs. Transmission is a bigger factor IMO.
My 1998 had it replaced under warranty GM Major guard. That was at 60-70k miles. I purchased the truck with 79k and had another #8 on a "fixed" GM block at 138k-ish miles. And I babied the engine and did all the maintenance to the letter.
I had a dealer drop in a new replacement engine [GEP Optimizer 6500] and all in the costs were around $14,000 out the door. About 55 hrs of labor, the engine, and a few new other things [new radiator, etc that I had done].
Telltale signs are white smoke, overheating conditions, loss of coolant, etc. There's usually no advance warning.. its just.. bam. It's there.
IMO, if I get another h1 down the road, I'd look for a 6.5 Non turbo with the 4 speed transmission. More reliable and honestly it's not that huge of a difference between a 6.5 N/A and a 6.5 Turbo.. they're both slugs. Transmission is a bigger factor IMO.
#13
Is the non turbo engine not affected by the 8 cylinder crack? I had mine (turbo) replaced to a non turbo engine on my H1 by a previous owner and i was wondering why he went with that engine.
#14
6.2 and 6.5 N/A engine blocks are a different casting number and are not subject to the #8 issue.
I've known people who went back to 6.2/6.5 for wheeling. If I had to do things over again I would have gotten a 6.5 non turbo with the 4 speed.
I've known people who went back to 6.2/6.5 for wheeling. If I had to do things over again I would have gotten a 6.5 non turbo with the 4 speed.
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Chad1996
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01-19-2015 02:59 PM