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Old 07-23-2012, 09:14 AM   #1
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Well last year I started to have some overheating problems. I have ended up replacing the water pump, t-stat, Radiator, Radiator cap and radiator hoses. Even changing back to stock tune and cutting the cat out. But the heating still remains. On 100+ days after about 15 minutes of driving it will get up to 230 running empty and I cant even pull a trailer anymore. When I recently replaced the radiator and hoses I noticed a white grime on in the radiator and the hoses. I'm not sure if this evidence of electrolysis but I think it is. I have a picture of the inside of the hoses.
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Old 07-23-2012, 09:14 AM   #2
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Well last year I started to have some overheating problems. I have ended up replacing the water pump, t-stat, Radiator, Radiator cap and radiator hoses. Even changing back to stock tune and cutting the cat out. But the heating still remains. On 100+ days after about 15 minutes of driving it will get up to 230 running empty and I cant even pull a trailer anymore. When I recently replaced the radiator and hoses I noticed a white grime on in the radiator and the hoses. I'm not sure if this evidence of electrolysis but I think it is. I have a picture of the inside of the hoses.
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Old 07-23-2012, 10:05 AM   #3
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There's a few possibilities it might be...

1. How many miles on the truck currently?

2. What kind of anti-freeze have you been using?

3. When you replaced your radiator, was there a lot of crud in it - ie: similar to what you have posted above?

4. Have you ever had the engine and cooling system throughly and completely flushed?

Possibilities that could be the problem:

Poor fitting radiator cap - allowing air to be sucked in..

Improperly tightened hoses - radiator and heater hoses - same as above..

Possible leaky head gasket..

Bad Fan - either electric or stock - may not be pulling enough air - this also goes for poor air circulation - something blocking the air flow into the radiator/engine compartment.
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Old 07-23-2012, 11:32 AM   #4
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15 min. on the highway or in town?
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Old 07-23-2012, 11:39 AM   #5
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Are you loosing any antifreeze
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Old 07-23-2012, 11:44 AM   #6
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If your loosing coolant and it's not on the floor check the oil for water you may have a head gasket issue

One way to check start truck in the morning and then check to see if the radiator hose has pressure by squeezing it if it does right after you start truck your head gaskets are leaking or at least one is

Cylinder pressure far exceeds coolant pressure so sometimes the coolant won't even go away air will just be pushed into system causing cavitation and air pockets just another possibility here
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Old 07-23-2012, 01:46 PM   #7
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Quote:
Originally posted by ArcticWolf:
There's a few possibilities it might be...

1. How many miles on the truck currently?

2. What kind of anti-freeze have you been using?

3. When you replaced your radiator, was there a lot of crud in it - ie: similar to what you have posted above?

4. Have you ever had the engine and cooling system throughly and completely flushed?

Possibilities that could be the problem:

Poor fitting radiator cap - allowing air to be sucked in..

Improperly tightened hoses - radiator and heater hoses - same as above..

Possible leaky head gasket..

Bad Fan - either electric or stock - may not be pulling enough air - this also goes for poor air circulation - something blocking the air flow into the radiator/engine compartment.
I have about 231K on the truck.
It overheats mostly going down the highway and cools off when I come to a stop.
The white stuff was in the radiator and I could see some in the thermostat housing.
I'm using 50/50 O'reilly's Coolant.
I have never had it completely flushed out. Bought the truck @ 144K and not sure it was done before that.
The radiator cap is new and fits tight and I'm not loosing any coolant.
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Old 07-23-2012, 03:31 PM   #8
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From that statement right there over heats going down highway cools at stops is almost positively a head gasket issue have it block tested at a shop to confirm for sure
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Old 07-23-2012, 03:33 PM   #9
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I wonder if you have a hose that's collapsing. That would choke off the coolant at speed.
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Old 07-23-2012, 03:34 PM   #10
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Thanks for all the feedback. I'll go get it tested out.
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