Still overheating NEED HELP AGAIN!
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Elder User
Joined: Apr 2008
Posts: 524
Likes: 2
From: Redmond, Or
Still overheating NEED HELP AGAIN!
Ok I need some more help guys, My truck still seems to be overheating while under a load... (pulling a long grade) I've changed thermostat x3, new waterpump, new clutch fan, new degas bottle, new cap, and flushed the system x2. I am missing something here, my only guess now is i have a leaking head gasket under sustained boost, and or a hose is colapsing under load? IDK??? I am supposed to be leaving for RRW tomorrow and towing my 28' camp trailer over the pass....
still plays with trucks
Joined: Mar 2004
Posts: 1,743
Likes: 3
From: Twin Falls Idaho
have you pulled the radiator and pressure washed it? I've seen a lot of cooling system problems remedied with a clean radiator. It can't be done in the truck, you've got to pull it and lay it down on some 2x4s and wash it back to front until the bugs and mud quit flowing. if you haven't done this give it a try.
Barney
Barney
Post Fiend
Joined: Sep 2006
Posts: 5,584
Likes: 0
From: Millbrook Alabama
are we talking boil over, or a guage that says its too hot? Have you tried an IR thermometer shot at the waterpump to get a true temp reading? IR thermos are about $20 to $70 and can be a lifesaver
Posting Guru
Joined: Jan 2007
Posts: 2,174
Likes: 1
From: Millersburg, OR
Have you hooked AE up to it and monitored oil temp? That will tell you if it is actually getting hot. You could just have the coolant sensor going out... it is just an idiot light and does nothing motor wise. After the truck has completely cooled off, hook it up to AE and see if the ambient temp matches what AE reads for oil temp.
Check your thermostat, take it out and stick it in water and see what temp it opens at. I have had one before that does not open. An easy way to check this is once your truck is good and warm take your hand and squeeze the upper hose. If it collapses that means the thermostat is open. If it is still tight, then it isn't opening.
Second, check your radiator make sure junk hasn't plugged it up inside and out. Just an outside washing has helped other people out. It only takes maybe 20 minutes to take it out and then you can hose it out and see how well fluid flows through it.
OIL Cooler... check it as well, heck while you are over here for the weekend you ought to pull it out and rebuild it. Sounds like a couple others will be doing the same thing.
Check your thermostat, take it out and stick it in water and see what temp it opens at. I have had one before that does not open. An easy way to check this is once your truck is good and warm take your hand and squeeze the upper hose. If it collapses that means the thermostat is open. If it is still tight, then it isn't opening.
Second, check your radiator make sure junk hasn't plugged it up inside and out. Just an outside washing has helped other people out. It only takes maybe 20 minutes to take it out and then you can hose it out and see how well fluid flows through it.
OIL Cooler... check it as well, heck while you are over here for the weekend you ought to pull it out and rebuild it. Sounds like a couple others will be doing the same thing.
Thread Starter
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Elder User
Joined: Apr 2008
Posts: 524
Likes: 2
From: Redmond, Or
have you pulled the radiator and pressure washed it? I've seen a lot of cooling system problems remedied with a clean radiator. It can't be done in the truck, you've got to pull it and lay it down on some 2x4s and wash it back to front until the bugs and mud quit flowing. if you haven't done this give it a try.
Barney
Barney
are we talking boil over, or a guage that says its too hot? Have you tried an IR thermometer shot at the waterpump to get a true temp reading? IR thermos are about $20 to $70 and can be a lifesaver
Have you hooked AE up to it and monitored oil temp? That will tell you if it is actually getting hot. You could just have the coolant sensor going out... it is just an idiot light and does nothing motor wise. After the truck has completely cooled off, hook it up to AE and see if the ambient temp matches what AE reads for oil temp.
Check your thermostat, take it out and stick it in water and see what temp it opens at. I have had one before that does not open. An easy way to check this is once your truck is good and warm take your hand and squeeze the upper hose. If it collapses that means the thermostat is open. If it is still tight, then it isn't opening.
Second, check your radiator make sure junk hasn't plugged it up inside and out. Just an outside washing has helped other people out. It only takes maybe 20 minutes to take it out and then you can hose it out and see how well fluid flows through it.
OIL Cooler... check it as well, heck while you are over here for the weekend you ought to pull it out and rebuild it. Sounds like a couple others will be doing the same thing.
Check your thermostat, take it out and stick it in water and see what temp it opens at. I have had one before that does not open. An easy way to check this is once your truck is good and warm take your hand and squeeze the upper hose. If it collapses that means the thermostat is open. If it is still tight, then it isn't opening.
Second, check your radiator make sure junk hasn't plugged it up inside and out. Just an outside washing has helped other people out. It only takes maybe 20 minutes to take it out and then you can hose it out and see how well fluid flows through it.
OIL Cooler... check it as well, heck while you are over here for the weekend you ought to pull it out and rebuild it. Sounds like a couple others will be doing the same thing.
Does it have the correct thermostat in it?
Thank you for all of your replies.. sure wish I had an AE or an oil temp gauge to keep an eye on things and put my worries to ease or validate them...
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Elder User
Joined: Apr 2008
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From: Redmond, Or
Just praying it's not a head gasket.... I remember Cookie having a similar problem last year, but I believe he was puking out the degas overflow... I've spent more time under the hood and under that truck in the last month than I have driving it...
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Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
There are 2 different stats, one has a short stem and the other has a long stem. We seen this before with someone getting the short stem and having over heating problems like you. Check to make sure you have the long stem stat.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
You MUST have the long-stem thermostat in your truck.
The parts-chimp at NAPA hasn't a clue, and I don't believe anyone even makes a 195 for our engine. Got the part number off that box? We can check it to see.
A short-stem will cause what you're seeing.
Pop
.....
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
My truck was overheating for the first time last year while on vacation.
When I replace the engine a few months ago, the radiator was so full of debris that I could hardly see through it.
100,000 miles worth of dust, dirt, bugs, etc will block airflow very effectively.
When I replace the engine a few months ago, the radiator was so full of debris that I could hardly see through it.
100,000 miles worth of dust, dirt, bugs, etc will block airflow very effectively.
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