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Old 10-04-2010, 10:21 PM   #1
iluvdrt
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Default Cooling issues (not a HG)

98 LGT wagon 2.5L

At highway speeds it runs about 190-195 which is about 20 warmer then my t-stat is at. When I idle it will over heat and get up to 210-220 in no time. If I rev it up it cools back off for awhile.

Things I have done:

I have replaced the t-stat with a new one, and the fans do work. I powerwashed the front of the radiator to ensure the fins werent dirty. The air flow is good.

Noticables:

not pushing coolant, NO coolant loss. Oil is fine, and hydrocarbon anylysis on the radiator is good. NOT A HG.

Looking at the car, the left side of the radiator is very hot, but the right side is very cold, even after a long drive.

The higher the engine revs the colder it will stay.

fans do work

Pressurizes fine

Educated guess:

I think the radiator has a clog in it. The car has over 212K mi on it and AFAIK it is the original radiator. It doesn't have air in it, and the heater does work. I have driven it about 3000 miles since the new t-stat. On the highway it is a little hotter then I'd like, but at idle it scares me. BTW the ambient outside temp is 54, so it is def not overworking. Any other thoughts? Thanks.
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Old 10-05-2010, 02:49 AM   #2
williaty
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When was the water pump replaced? They do wear out eventually.

Barring that, clogged radiator sounds like a thing to try.
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Old 10-05-2010, 03:24 AM   #3
Tim Sanderson
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Quote:
Originally Posted by williaty View Post
When was the water pump replaced? They do wear out eventually.

Barring that, clogged radiator sounds like a thing to try.
sounds like good advice to me. Not even sure how to test the radiator.
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Old 10-05-2010, 03:39 AM   #4
williaty
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Quote:
Originally Posted by Tim Sanderson View Post
sounds like good advice to me. Not even sure how to test the radiator.
My first guess would be to remove the radiator and pour water in at the top with a hose and make sure it comes out faster than you can put it in. Other than that, get a known-good one I guess.
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Old 10-05-2010, 04:49 PM   #5
Y_I_K_E_S
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Yeah, it definately sounds like your radiator is clogged. I'd pop it off and have it back flushed and see what comes out.
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Old 10-06-2010, 01:16 PM   #6
iluvdrt
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Quote:
Originally Posted by williaty View Post
When was the water pump replaced? They do wear out eventually.

Barring that, clogged radiator sounds like a thing to try.
Water pump was done about 55K ago with the t-belt.

I am going to remove the rad today, and fill it up with a strong degreaser then let it set for awhile. I'll then back flush it with hot water. Maybe something will come out.

If not maybe its the water pump.
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Old 10-06-2010, 02:10 PM   #7
GrundleJuice
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Quote:
Originally Posted by iluvdrt View Post
Water pump was done about 55K ago with the t-belt.

I am going to remove the rad today, and fill it up with a strong degreaser then let it set for awhile. I'll then back flush it with hot water. Maybe something will come out.

If not maybe its the water pump.
Get ready for a rancid smelling slap in the face.
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Old 10-06-2010, 03:15 PM   #8
RaineMan
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Why not just replace the radiator? They're not that expensive. Might as well replace the hoses while you are at it.
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Old 10-06-2010, 03:28 PM   #9
iluvdrt
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Quote:
Originally Posted by RaceFaceXC View Post
Get ready for a rancid smelling slap in the face.
LOL, I know. It is def clogged. it took 5 min just to fill it up with degreaser LOL.

Quote:
Originally Posted by RaineMan View Post
Why not just replace the radiator? They're not that expensive. Might as well replace the hoses while you are at it.
Thats what I'll have to do I guess. Thought I would try to save a buck, but that isn't going to happen. Time to call Koyo and get a nice aluminum one, might as well get a cool safe t-stat too.

Onto bigger news though, since I had the rad out I decided to check my t-belt. One of the idlers is about to grenade. There is metal dust everywhere and the seal on the bearing fell off. This sucks because I just did all this about 3 years ago.

Oh well, you play/you pay I guess. Might as well put in a new water pump as well.

Thanks for the reply's guys!!
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Old 10-06-2010, 04:46 PM   #10
RaineMan
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Isn't rebuilding fun? I did new radiator, thermostat, water pump and timing set on my fiancee's truck back in January... then we sold it in March. What a waste.
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Old 10-06-2010, 05:58 PM   #11
iluvdrt
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Quote:
Originally Posted by RaineMan View Post
Isn't rebuilding fun? I did new radiator, thermostat, water pump and timing set on my fiancee's truck back in January... then we sold it in March. What a waste.

Well I don't mind doing it, it just happens at the most inconvienant time...like when I am broke or we have to spend money on a big bill or something.
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Old 10-07-2010, 12:35 PM   #12
RaineMan
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Oh **** only breaks when you can least afford it... seems to be Murphy's Law at work.
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Old 10-07-2010, 01:30 PM   #13
VIsubi
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210-220 isn't over heating and your fan should come on by then. I usually run between 190-195 all the time. Sure it might be your water pump but did you do the radiator for bubbles test yet...kinda hard though cause coolant trys to push its way out of the radiator cap trying to overflow to the coolant catach can..but as long as theres no bubbles its not your HG
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