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  #1  
Old 06-02-2011, 09:27 AM
Dang Dang is offline
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Default Simple fix I hope!!

Man I know..... It seems I only come visit the forum when I have a problem but well I been kinda busy and I promise to visit more in the future! Honest!
Anyway last night when I got off work at midnight it was cold outside!
So I cranked the blower and heat/defrost on ('99 XLT) and headed home. Ten minutes later I'm still chilled, the blower still pushing cold air and the gauge is still at C. Then just at that moment it jumps up towards H where it suppose to be...and presto! Warm air arrives! Just like that. No over heating occurred.
Then I get home and shut off the motor, get out and walk around the front of the truck towards my house and I hear that water boiling noise under the hood.
@#%^!!...no leaking.....just noise!
So tell me a new thermostat or cap is all that I need please.....please!!
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  #2  
Old 06-02-2011, 09:38 AM
Clinton Clinton is offline
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Default Re: Simple fix I hope!!

It sounds like thermostat, or thermostat switch but I'm not 100% on it
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  #3  
Old 06-02-2011, 09:51 AM
klinger86 klinger86 is offline
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Default Re: Simple fix I hope!!

Sounds like thermostat to me as well.
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  #4  
Old 06-02-2011, 10:02 AM
FireRanger FireRanger is offline
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Default Re: Simple fix I hope!!

Sounds like low coolant to me. If you hear gurgling, that is air. With the engine COLD, open the radiator and look in. I bet it is low. Also, the needle should not be up by the H. It should be in the middle of normal.
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  #5  
Old 06-02-2011, 10:03 AM
Clinton Clinton is offline
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Default Re: Simple fix I hope!!

Quote:
Originally Posted by FireRanger View Post
Sounds like low coolant to me. If you hear gurgling, that is air. With the engine COLD, open the radiator and look in. I bet it is low.
Hell, thats the simplest fix yet!!
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  #6  
Old 06-02-2011, 10:11 AM
Dang Dang is offline
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Default Re: Simple fix I hope!!

Quote:
Originally Posted by Clinton View Post
Hell, thats the simplest fix yet!!
Sure is!
So I did that and yes I do not see any coolant within the radiator....
but the coolant's plastic tank on the side is almost full.....
Should I add some coolant directly to the radiator then ?
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  #7  
Old 06-02-2011, 10:26 AM
CrazyD CrazyD is offline
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Default Re: Simple fix I hope!!

Yes. Your radiator should be full and your reservoir should be at the proper level also. You may want to check you reservoir line to be sure its not clogged.
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  #8  
Old 06-02-2011, 10:52 AM
FireRanger FireRanger is offline
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Default Re: Simple fix I hope!!

You should fill the radiator with the 50/50 mix of water and antifreeze. Then with the cap still off, start the engine and let it warm up. Once the engine reaches operating temperature, the t-stat will open and coolant will begin circulating through the radiator. You'll probably see the level drop down again as it sucks the coolant in from the radiator. Keep adding more as the level drops. Eventually the level will stabilize full. Be careful, that water is 190+ degrees. Put the cap back on. Then fill the reserve tank 1/2 way up with the 50/50 mix. Done.

If you have coolant in the tank still, then you radiator cap is probably bad too. Replace that, its like $5.
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How to: Aux light wiring, relays, & fuses
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  #9  
Old 06-02-2011, 11:39 AM
Dang Dang is offline
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Default Re: Simple fix I hope!!

Well here's what I just did....
I added some 50/50 mix w/any color coolant directly down he radiator. Slapped on the cap and waited awhile....abiut five minutes and nothing happened. Then I got worried I'd run out of gas so I drove to the station. Again the gauge just stuck on C. Turned on the blower and heater... just cold air. Then suddenly the needle jumps up towards H like a switch was turned on. Not gradually but fast! Heats a blowing.
I arrive at the station and coolant is squirting out under the hood from the plastic tank's cap this time. Got gas and I zipped over to NAPA and picked up a new thermostat and gasket for 6 bucks. I know I have at least four tubes of sealant in the garage somewhere but I go and pick up another tube anyway. On the way back from there I see the gauge's needle move up towards the red and then back to normal a few times....Kinda floating up and down. I had thermostats go out before and I don't recall ever having a problem with heater functions.
Hoping this all goes away with the new thermostat. Looks like a easy job.
Unfortunately the motor is too hot to get started before I have to go to work.
Stay tuned for tomorrow conclusion......I hope!

Last edited by Dang; 06-02-2011 at 11:51 AM.
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  #10  
Old 06-02-2011, 12:15 PM
01B3000 01B3000 is offline
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Default Re: Simple fix I hope!!

as to the overflow, overflowing, you possibly had too much in the overflow

but for the gauge jumping,
sounds like there is still air in the system. Same problem i had when i changed my waterpump.
After you change the tstat,
while the truck is cold you need to take off the radiator cap, turn on the heat, and then start the truck.
Add coolant until the radiator cannot take any more, then let it go down a bit, and squeeze the upper radiator hose and see if air comes out of the radiator opening.
If it does, keep doing that every so often, untill the truck gets up to temp, and coolant starts coming out of the radiator by itself.
After that shut off the truck, replace the cap, and you should be done.
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  #11  
Old 06-02-2011, 12:59 PM
FireRanger FireRanger is offline
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Default Re: Simple fix I hope!!

Ya you may very well have a t-stat problem too. But low coolant will cause all kinds of weird things regardless. Steam will make gauges, caps, and tanks to sneaky things. It really messes with the way the systems is designed to work. Replacing the stat is not a bad thing so you might as well do it. But you need to follow these instructions to ensure the system is full too.
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How to: Aux light wiring, relays, & fuses
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  #12  
Old 06-02-2011, 08:05 PM
01B3000 01B3000 is offline
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Default Re: Simple fix I hope!!

Replace the tstat, always, my truck blew the seals on the waterpump, because i had a faulty cap and tstat.
The seals were meant to plow to prevent major damage, but it wouldve saved a day of working and about 200 bucks if they were both in working order
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RIP Jason
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  #13  
Old 06-03-2011, 12:56 AM
Dang Dang is offline
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Default Re: Simple fix I hope!!

Back from work.....added more coolant during lunch down radiator's throat while engine idled. Reservoir stayed at half full during the process. While watching the gauge on the dashboard coolant boiled out of top of radiator. So I shut the motor off and put the cap back on the radiator. Noticed that top hose was pretty cool. I guess I'll pick up a new cap while I'm at it.
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  #14  
Old 06-03-2011, 03:49 AM
FireRanger FireRanger is offline
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Default Re: Simple fix I hope!!

The tank level is not going to change without a properly functioning cap in place on the radiator. If the system is full and you leave the cap off, it i will overflow. It expands as it gets warmer. Did the gauge move up to normal correctly now?
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How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide

Last edited by FireRanger; 06-03-2011 at 09:12 AM.
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  #15  
Old 06-03-2011, 08:39 AM
Dang Dang is offline
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Default Re: Simple fix I hope!!

At that time the gauge creeped up towards normal but backed down to C.
On the way home it read normal all the way and gurgled just a little when I shut the motor off!
(Oh and I got a call from my wife letting me know her jeep has a flat. I found a leak on the inside sidewall!) GOOD TIMES!!
Well I better get started on that T-stat!
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