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Discussion Starter #1 (Edited)
Replaced thermostat, upper and lower radiator hoses.

Water pump was replaced 3,000 miles ago.

Radiator was replaced 30,000 miles ago.

No visual leaks under the hood.

135,000 miles on this puppy.

???

Thanks in advance.
 

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when did you last flush it?
 

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does the coolant have a brownish look to it? and is there a film on the raditor if you look down inside it
 

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Discussion Starter #5
No film in the radiator that I can see.

Brownish coolant.....the only place I seen brownish color was when I replaced the thermostat. Heck, the old thermostat is covered with brownish color/coolant.
 

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you may need to flush several times, you may have a blockage of some sort...does the temp come down a bit when you turn on you heater?
 

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Discussion Starter #8
How can you tell when its time to replace the radiator?

I replaced it at 105,000 miles. Here we are 30,000 miles later.

With both upper and lower hoses replaced that only leaves the radiator itself.
 

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try flushing it again. if you didnt use distilled water, that can also cause problems with the cooling system
 

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replace the radiator cap...if worn out, it can cause overheating...also check your fan clutch...if you can spin it by hand, and it makes more than a half to a full revolution or just freely spins, you have found your problem
 

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Discussion Starter #11
I'll flush it again.

Let me know if I am missing something or something that you would do different.

Drain plug on radiator, drain plugs on block. Leave them off, flush radiator with water. Install radiator plug, install block plugs. Add coolant.
 

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sounds correct...also check those other items...and it wouldnt hurt to clean out the front of the radiator cause bugs and dirt can cause that also
 

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yup...its attached to the waterpump pully nut...also go ahead and change the radiator cap as its probablly loosing pressure anyway (they are like 5 bux) 16lb
 

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I can spin the blades by hand and they turn freely. Problem there?
give em a really hard spin and let em go if they make more than 1.5 revolutions then it may be suspect
 

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if there is resistance, then that is good...that almost completely eliminates that...are you loosing coolant by any chance?
 
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