International Navistar T-Stat in Olds 5.7 ? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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All Other GM Diesels Discuss any other GM Diesel engines... 5.7l Olds, Chevette Diesel, or anything else that doesn't fit anywhere else...

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Old 08-09-2015, 08:48 PM   #1 (permalink)
upsmoker
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International Navistar T-Stat in Olds 5.7 ?

Is anyone running a Navistar thermostat in there 5.7 diesel? Are you trimming (removing) the rubber? I`d like to hear the pros/cons from you

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Old 08-12-2015, 09:08 AM   #2 (permalink)
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I'm just running stock stats in mine. The one in my 80 didn't like to make any heat. After multiple stat changes I just ended up removing the fan in the winter. My 81 I have not had to mess with it seems fine summer and winter.

The bypass is pretty big on these so I would not think the rubber would make a difference either way.

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Old 08-13-2015, 11:11 AM   #3 (permalink)
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I have a list of upgrade parts from the old gm-diesel.com thread and a factory thermostat from a mid 80's Ford 6.9 diesel was one of them (recommended by dieselolds) due to the opening being so much larger. He stated they were around $35 from a Ford dealer. I have not run one myself yet but, my D3Bs will be out of the shop next week and I will be at a Ford dealership before they have hit the first cylinder. No info on the rubber was attached to the old post (2007), maybe he will wander by and inform us if he left it as-was or trimmed it.
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