Overheating

**Jbehrens** · 10-07-2019

Hello

What could cause the truck to overheat then cool back down and then run fine?

I have replaced water pump, thermostat, temperature sensor and turbo (went out).

Pulled the head and it shows no cracks while using magnaflux.

I had a reputable shop check the head as well and they show no signs of the head being bad.

So what is the next step to look for? Heater core is not leaking.

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**watersupply189** · 10-07-2019

Originally Posted by Jbehrens

Hello

What could cause the truck to overheat then cool back down and then run fine?

I have replaced water pump, thermostat, temperature sensor and turbo (went out).

Pulled the head and it shows no cracks while using magnaflux.

I had a reputable shop check the head as well and they show no signs of the head being bad.

So what is the next step to look for? Heater core is not leaking.

Welcome friend! A little info on your truck would help.

2016 Ram Laramie 3500, G56, 6.7, Rough Country Leveling, HID headlights, Morimoto LED fogs plus a whole lot more!

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**cwendel** · 10-07-2019

If the head is flat and the block is flat and the fan clutch is working, my guess would be either injectors are leaking, turbo is partly clogged, DPF is partly clogged or you need to clean out the fins in the radiator.

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**Jbehrens** · 10-07-2019

2012 3500 6.7 - Full delete, XRT Pro Tuner, cold air, 4” exhaust, 3rd gen manifold swap and 66 mm turbo.

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**Jbehrens** · 10-07-2019

DPF is removed.

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**Camp2SeaDoo** · 10-10-2019

Does it overheat only when towing or driving freeway? How long before it overheats from a cold start?

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**Camp2SeaDoo** · 10-10-2019

I forgot to add, My uncle had a 2002, heater core was plugged, caused it to overheat every time he drove it.

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**Polaraco** · 10-10-2019

Originally Posted by Jbehrens

Hello

What could cause the truck to overheat then cool back down and then run fine?

I have replaced water pump, thermostat, temperature sensor and turbo (went out).

Pulled the head and it shows no cracks while using magnaflux.

I had a reputable shop check the head as well and they show no signs of the head being bad.

So what is the next step to look for? Heater core is not leaking.

How many miles on it and where do you live?

I've seen that happen when the rad gets' clogged with grass and debri.

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