One other thing, you are running in an over fuel condition at 444 hp. This will not hurt a thing, if you remember that. you will build massive heat on the piston tops and eventually one or more will start cracking, usually dirctly over and in line with the piston pin.
Which means it will split there and out goes the rod. I have seen a lot of pistons that the crack was there but had not broken all the way through.
It is a good engine, and will last a long time if you keep the cooling system clean and watch the Pyrometer climbing hills. I'm quite curious as to what the problem was with your friends truck framtruck01. Did you get it solved? I have an '85 Pete 359 that was also blessed with the low flow cooling system BCIV 400hp. It has been causing me problems with overheating for some time now. I have had the radiator redone, and since tested it to be sure it was done right, and it does indeed seem to be working, seem to be getting nearly 40deg temp drop one side to the other.
I have changed thermostats, removed the water pump and checked it out, (was going to replace it but could not find anything wrong with it) This one seems like it will just stop circulating when placed under load for awhile, which rapidly causes it to overheat, when it decides to circulate again, it cools down rather quickly. I've had a couple people (not familiar with the low flow system) suggest a head gasket, or cracked head. It seems more like air in the cooling system to me, air compressor? cracked aftercooler? I'm open to suggestions from anyone here, next step is to start tearin it apart otherwise.1989-1993 Dodge D/W 250 & 350 with 5.9L Cummins 12V Diesel engine However, I am not convinced that this is what is causing the problem, to me the symtoms don't seem quite right. If you’re familiar with diesel trucks, you’ve probably heard of the first generation Cummins. In my opinion, it’s by far the most reliable diesel engine ever put into a pickup truck, with the only close competition coming from the 7.3L Powerstroke. Even today, 30 years later after their inception, there are multitudes of 1st Gen 5.9L Cummins trucks on the road. When the 5.9L 12-Valve Cummins engine was introduced to Dodge’s D/W truck lineup, it created a new standard for OEM diesel performance. The 1st Gen 5.9L Cummins had unique specs never before seen on a diesel pickup truck, including a Holset fixed geometry turbocharger and direct fuel injection. These allowed Dodge’s D/W 250 and 350 to give truck owners a best-in-class 400 lb-ft of torque while also improving drivability and throttle response.Īlthough the 160 horsepower and 400 lb-ft of torque doesn’t seem impressive by today’s standards, they were very impressive for the time. Today, we know the first gen Cummins to be capable of producing high horsepower and torque numbers incredibly easily. #Cummins big cam 350 ac diagram cracked#.
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