My temp gauge goes to 190 then back down to 150ish
While driving my temp gauge goes up and down.and heat never gets hot just warm.new thermostat
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Mine died the same thing, only difference is my heat blows hot as hell
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You've got a bad thermostat or a whole lot of air in your cooling system.
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Betcha money a cummins thermostat will fix it. We see a lot of folks installing stants and come to us with this problem.
Sent from my SCH-I605 using Tapatalk 2 |
Originally Posted by mysterync
(Post 1044185)
Betcha money a cummins thermostat will fix it. We see a lot of folks installing stants and come to us with this problem.
Sent from my SCH-I605 using Tapatalk 2 |
Could be a number of things. Anytime you have wide fluctuations that are persistent we would look for as mentioned above air in the cooling system, air entering the system via a leak (pretty rare with these trucks) or possibly a faulty gauge. In theory a water pump can cause it but unless the fins are missing a faulty pump is pretty hard not to notice. In very cold climates a big cooling system will experience variations.
I would start with a coolant funnel and verify there's no air in it and move from there. Obviously a faulty thermostat could cause similar issues as well. Sent from my SCH-I605 using Tapatalk 2 |
So I've replaced my thermo,added an aftermarket gauge, and water pump seems fine. I will give the funnel trick a shot.
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Originally Posted by Pclem
(Post 1044339)
So I've replaced my thermo,added an aftermarket gauge, and water pump seems fine. I will give the funnel trick a shot.
Did you use a cummins thermostat? Sent from my SCH-I605 using Tapatalk 2 |
no, i used a failsafe from autozone, that way if it does fail it will fail open
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Originally Posted by Pclem
(Post 1044382)
no, i used a failsafe from autozone, that way if it does fail it will fail open
Did the thermostat you installed have the "jiggle" valves? They say they have a "bleed notch" but they just don't work well. Often cause drastic temperature swings. If I were in your shoes I'd order a cummins thermostat and see if that fixed my problem. Sent from my SCH-I605 using Tapatalk 2 |
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