05 trailblazer overheating??
#1
05 trailblazer overheating??
Engine overheats at idle and while driving. I have replaced tstat, water pump, and fan clutch. No leaks and no milky oil.did my best to burp system when I replaced coolant. But engine is still getting way too hot. I noticed my upper hose reaching temps around 150-160 degrees while my lower hose was a cool 95 degrees. Radiator is free of any debri and it's only 80 degrees ambient temp. So please help. I would be very grateful thanks
#4
Super Moderator
Looks like your radiator is working good.
I'd say that your gauge is off, might try a new temp sensor.
Do another check, get it high temp by what the gauge says,
and check the temp on the hose real close to the TStat housing.
PS:
Got a Lazar Gauge too, love it !
I'd say that your gauge is off, might try a new temp sensor.
Do another check, get it high temp by what the gauge says,
and check the temp on the hose real close to the TStat housing.
PS:
Got a Lazar Gauge too, love it !
Last edited by SWHouston; May 19th, 2016 at 10:12 AM.
#5
All my gauges in the cab are broken (need new stepper motors)... that's next on my list. But temp at the tstat housing read around 95 while the block itself is 250+... Is it possible the coolant passages inside the block are clogged up? Thank you for helping
#6
Super Moderator
#7
No I did not. When I refilled with coolant I just parked at an incline, let the engine idle, left the cap off, and filled while squeezing the upper and lower hoses. So should I try again and use vacuum? How would I fill and vacuum at the same time?
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#8
GM Switec X27.168 Stepper Motor
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#9
Super Moderator
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You'd probably need to go by a Radiator Shop, and have them use their Pump to clear the air out of your system.
You could do it yourself, but, the cost of the equipment for a one time use may be prohibitive.
https://www.youtube.com/results?sear...ant+vacuum+kit+
and
https://www.amazon.com/s/ref=nb_sb_n...nt+vacuum+pump
You'd probably need to go by a Radiator Shop, and have them use their Pump to clear the air out of your system.
You could do it yourself, but, the cost of the equipment for a one time use may be prohibitive.
https://www.youtube.com/results?sear...ant+vacuum+kit+
and
https://www.amazon.com/s/ref=nb_sb_n...nt+vacuum+pump
#10
I had the same thing happen to my 05 Trailblazer back when I had it. Turned out to be a bad cooling fan relay. Replaced it with a new one and it stopped overheating.