Coolant Problem!!!!
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Senior User
Joined: Sep 2003
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From: NC
Coolant Problem!!!!
I am having a little problem with my coolant. After the truck sits for a couple of hours, it tends to want to over heat right off the bat. I let off the go pedal and the temperature falls back to normal and stays there the duration of the trip. This is happening more frequently and is really concerning me. This morning it went to hot and started blowing coolant. Of course again when I let off the go pedal it acts as if nothing is wrong. I changed the thermostat the other day figuring it would help but no luck. Today I changed the radiator cap but I don't think it will yeild promising results. Just went over 172,000 miles last week so I am starting to think the water pump is trying to hint something to me. Any kind of hints will help and I will appreciate any kind of advice given. Thanks.
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Joined: Jun 2004
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From: las vegas nv.
Check intake manifold bolts...? I had symptoms of a blown head gasket,bought parts and went to it one week-end.It turned out to be the intake, it had gotten loose enough in the back to start sharing vital fluids. I was lucky considering it was my own fault anyway. If you don't see bubbles, there is a tester that will show if you have combustion gasses in the coolant. What engine do you have? or did I miss that?
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From: NC
Ultramagdan - What would be the best way to check for bubbles?
Seetwisted - So you just had a bolt that wasn't tight? 4.6L-W Triton
AJbeiler - I believe the coolant is coming from the reservoir overflow because of excessive heat
Seetwisted - So you just had a bolt that wasn't tight? 4.6L-W Triton
AJbeiler - I believe the coolant is coming from the reservoir overflow because of excessive heat
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From: NC
OK guys,
When driving my truck to work this morning it did the same thing. This time it went into the red and stayed there. I pulled off the road and let it cool for a min or two and turned the key to show the temperature. Somehow the temp was at normal. I cranked it back up and it was fine the rest of the way. Before I had pulled over, I turned the heat on to try to slow the bleeding. To my suprise, there was no heat coming from the vents. Now, call me crazy but it looks to me like I'm gonna have a fun saturday replacing my hearter core. Let me know if you guys agree with me!!!! Thanks for your help!
When driving my truck to work this morning it did the same thing. This time it went into the red and stayed there. I pulled off the road and let it cool for a min or two and turned the key to show the temperature. Somehow the temp was at normal. I cranked it back up and it was fine the rest of the way. Before I had pulled over, I turned the heat on to try to slow the bleeding. To my suprise, there was no heat coming from the vents. Now, call me crazy but it looks to me like I'm gonna have a fun saturday replacing my hearter core. Let me know if you guys agree with me!!!! Thanks for your help!
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Joined: Dec 2001
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From: Louisville,Ky.
Sounds like you have a large air pocket in the system, or the water pump impeller is slipping. I wouldn't replace the heater core just yet. If there is no coolant flowing, then it will not get hot.
Last edited by LxMan1; Jul 4, 2007 at 01:21 AM.
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From: SE Wyoming
Sounds like an air bubble to me too. I've done coolant swaps half a dozen times on these modulars and have never had that problem, knock on wood. I am not sure how some people get them and some don't. Try letting it idle up to operating temp with the reservoir cap off.
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From: NC
Hey guys!
Well today I fired my truck up and let it warm to an idle with the cap off. I didn't see any changes so I put the cap back on and waited a few moments. I cracked the cap and sure enough bubbles started rising to the top of the resevoir. Once the fluid reached the top of the reservoir, I closed the cap and let the truck cool off. After a couple of rounds with the reservoir, the bubbles stopped. I was thinking about it today and remembere that I once checked the reservoir and noticed it was empty. I filled the tank and never thought about it again. Makes perfect sense to me why this would happen. You guys saved me money and a long day of accomplishing nothing! Thank you so much for your help! But for every silver lining there is a cloud. Now I just have to find where the leak is that started this catastrophe. Someone once told me that there is a small hose under the lower intake manifold making it hard to diagnose where the leak is when searching for a coolant leak on these models. You guys heard of this?
Well today I fired my truck up and let it warm to an idle with the cap off. I didn't see any changes so I put the cap back on and waited a few moments. I cracked the cap and sure enough bubbles started rising to the top of the resevoir. Once the fluid reached the top of the reservoir, I closed the cap and let the truck cool off. After a couple of rounds with the reservoir, the bubbles stopped. I was thinking about it today and remembere that I once checked the reservoir and noticed it was empty. I filled the tank and never thought about it again. Makes perfect sense to me why this would happen. You guys saved me money and a long day of accomplishing nothing! Thank you so much for your help! But for every silver lining there is a cloud. Now I just have to find where the leak is that started this catastrophe. Someone once told me that there is a small hose under the lower intake manifold making it hard to diagnose where the leak is when searching for a coolant leak on these models. You guys heard of this?
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From: NC
Hey guys!
Well first I just wanna thank you guys for ya'lls help. I got fed up monday morning with it happening again and again, so I put it in the shop. Got a call that afternoon to inform me that BOTH head gaskets were blown. Guess it's time to saddle up. On the bright side, this gives me a reason to go through the heads and give it a good polish. Thanks again.
Well first I just wanna thank you guys for ya'lls help. I got fed up monday morning with it happening again and again, so I put it in the shop. Got a call that afternoon to inform me that BOTH head gaskets were blown. Guess it's time to saddle up. On the bright side, this gives me a reason to go through the heads and give it a good polish. Thanks again.
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Joined: Jul 2007
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From: Florida,it's flat and hot
I hope you know these shop people,I was having the same problem and I poured Bar's stop leak(the non transparent bottle) in the radiator and I haven't had to replace the head gasketts yet.Buying time,maybe.
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Joined: Dec 2006
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From: Lima Ohio for college
for all you guys how like to fix a head gasket with out taking them off get this. napa carries a very good thing. blue devil is the name. this stuff work on every thing i have not used but have watch it used. the stuff is 80 dollars for a can and is garrenteed. it works if you need a quick fix. check it out.
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