I just bought a 1995 4runner and was driving it to work and the radiator cracked. When I replaced the radiator I noticed that the coolent was brown with a ton of rust and crap. I flushed the system completely and replaced the thermostat (180 degree Failsafe), refilled and got all of the air out of the system. Today while driving home I noticed that it was running a little hot so I pulled over to make sure I didn't have any leaks and make sure fluid levels were good. Nothing was obiously wrong so I just drove a little slower up hills and made it home fine. Once I got home I opened the radiator cap and noticed a thin residue of rust like material and I am assuming that there was still some junk in the system. Is there any way to thoroughly get all of this crap out and would this cause it to run a little hotter. I have already taken off all off the upper and lower radiator hoses and flushed them out and even disconnected the heated core to flush it out. Should I go get an additive to flush the system. Also the water pump isnt leaking and there are no leaks.
Running a little hot
- Thread starter kpnavarro
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combatmedic
Banned
Whenever I do a coolant flush I run the water through the radiator for about 10-15 minutes, then cap fill with fresh coolant and add a bottle of water wetter. 95 175k still goin strong.
I flushed the radiator again and same thing in 115 degree weather. I was driving at about 70mph at 3000rpms and was getting hot again so I backed off and it cooled down. I am kind of over this radiator, I was thinking of replacing it with a all metal instead of this aluminum plastic thing from autozone. Anyone recommend anyone that sells good radiators at a good price
I have a stock radiator. When I open up the radiator cap there is a layer of crap that is rusty brown color and has the consistansy of really fine dirt. I just flushed it again the other day and again it has the junk in it. How the hell do I get all of it out I flushed the system for like 30 minutes when I had it all apart. How do I check if the fan is engauging correctly?
combatmedic
Banned
You may want to invest in a new radiator... These engines run forever as long as you dont over heat em.
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combatmedic
Banned
Wont hurt.
Beanzermin
New member
To test the fan clutch, turn the car on and try to stick a magazine in the fan. If it beats the hell out of the magazine it's good. If the fan stops you need a new fan clutch.
combatmedic
Banned
Lol you mean to destroy a fan. Might as well test it with a brick or his finger.
nevada
Senior Member
if its getting that hot, you should be able to hear the fan. if you cant hear it...the clutch is likely bad.
and, trying to stop it with a mag isnt really destructive.
ive used a gloved hand before, its fine if the clutch is bad....but, finding a good one. yeh, it hurts a bit.
and, trying to stop it with a mag isnt really destructive.
ive used a gloved hand before, its fine if the clutch is bad....but, finding a good one. yeh, it hurts a bit.
Yes. With the truck off try to spin the fan. It should not spin more than 1 whole rotation I believe, it should have quite a bit of resistance
Also if the fan clutch is bad you would experience over heating while idling at a stop also
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