Cooling a 6.5 - Diesel Bombers



Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

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Old 01-27-2011, 08:38 PM
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Question Cooling a 6.5

Would putting a Super Cool kit on an original 96 6.5 motor be a good idea to prevent head and block cracking? Includes Duramax fan, clutch, dual thermostats and a 130 gpm water pump.
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Old 01-27-2011, 08:49 PM
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well duramax fan would help keeping temp down to me and what have talk to Heath diesel to is stay with the one thermostats will be better not sure about the 130 water pump but will let you know ppl say if you see HO on the pump high out put that bull sh|t that is just of comp. that makes it just call Heath Diesel he will tell you
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Old 01-27-2011, 09:07 PM
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How come the single would be better than the dual?
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Old 01-27-2011, 09:19 PM
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duel you never know when one went bad and it doesn't do thing diff in other whose if one goes bad you don't know if the other good it my read the same temps as single i taken my duel off and went with single
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Old 01-27-2011, 10:20 PM
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If you don't run dual thermostats I wouldn't put a high flow water pump on it because you can only flow as much as the thermostat will flow. If it was me I would convert it to the high flow water pump and dual thermostats. Also make sure your radiator is clean as the day the truck was new and your exhaust is flowing free.
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Old 01-29-2011, 06:51 AM
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Who makes the super cool kit? Will it work with mechanical injection?
Since adding the Side Winder turbo I can't tow an empty trailer without temps going over 260. Last summer I towed a 17 foot fiberglas boat from Canada to North Carolina on Rt 81 and had to run the hills in 3 gear, no ac.
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Old 01-31-2011, 09:20 AM
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SSD, DSG and Heath diesel both offer different cooling kits, but they seem to be only for 94-2000 year of 6.5's. I wouldn't be suprised though if the water pumps wouldn't fit a 6.2.
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Old 01-31-2011, 09:56 AM
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call Bill Heath he will let know what would work or not he right front guy talk to
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Old 01-31-2011, 10:31 AM
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My truck would spike in temp here about 4 or 5 years ago just pulling a little bumper hitch. I ran radiator flush in the engine for about a week.... You shoulda seen the black stuff that came out of there! Then pulled the radiator, flushed it with a garden hose, cleaned the fins, and flushed the engine with garden hose (Make sure it's cool first). Put back together..... 2 years ago, I towed my sister's gooseneck trailer grossing close to 13k combined and never even started to warm up past normal. That was blasting the AC too.

Oh, and stock cooling system in my case....
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Old 02-05-2011, 10:33 AM
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just make sure your radiator is really clean i worked on a 95 with a 6.5 and when i pulled the grill off and pulled the ac condensor out of the way it was nasty the fins of the radiator were plugged solid with bugs and dirt so after 4 cans of engine degreaser and hot water it was good as new and no more overheating.
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