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please help...my husband is 1000 miles away

J

jeff l

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my husband won a 1992 Blazer off of ebay and is driving it home right now. He called me and asked me to post this. He is having problems w/ the truck running hot. It steady runs at 210 degrees. Once he turns the truck off it goes way high. Any suggestions of what to do? he is going to stop at the next autozone he sees. Thanks, Jeffs Wife
 
210 degrees is pretty much normal temp for a 90 Blazer. The stock thermostat is a 195 degree. I have an 89 TBI blazer it runs 200-210 in the hot summer with the AC on.
Also the stock gages are not the most accurate. My Gage reads about 5 degrees high. Compared to the temp the computer sees.
It is common for the temperature to go up when you shut off the engine. Epically after running it hard on the freeway. The block is hot and there is no water circulating so the temp climbs from the residual heat.
Beings it is a unfamiliar truck. As said above it may be wise to check coolant level and the other fluids and for leaks etc.
 
Thanks folks, he says thank you. He wanted me to ask y'all what would be too high of a temp once the motor stops? He wants to know what would be something to worry about?
 
I have never worried about how hot the engine gets if it is not running.. If he is worried about it tell him to idle the engine for a couple of minutes before turning it off. That will stabilize the coolant temp and it wont climb so high.
Also he can pick up some additive you add to the radiator. It is called Water Wetter made by red line. There are other companies that make similar products. AZ should carry it or a similar product. It will reduce coolant temps and make the cooling system more efficient.
 
Big91RustyBucket said:
I would say if he think's it is running hot why is he turning it off? There is no way for it to cool with no fluid circulating through the block.
Click to expand...

1,000 miles away? I'd say he shuts it off to fill up with gas, pee breaks, etc:rolleyes::D

He's probably fine to get it home and give it a good looking over there. I would check radiator fluid, oil, etc while on the road.


This thread needs a link to what he bought;);)
 
thanks all for such quick replies. My husband feels better about driving it back now. He is just going to keep an eye on it. Thanks again, Jeff and Clancey
 
Tell him not to worry about the 210 temps. 210 is in the exact middle of the normal operating temprature range for his new K5.. Newer Computer controled fuel injected trucks and cars are designed to run hotter than older ones. Hotter operating temps help reduce emissions and give better fuel milage.
 
When the truck is turned off, the temp gauge will read higher as coolant is no longer circulating through the system. The gauge should go back down to "normal" a few seconds after its started again.

Perfectly normal.

John
 
If he is relly worried about heat soak, pop the hood and let it idle for a few befeore turning off and keep the hood popped untill it cools down a bit. I do this on really hot days when towing the rig. Though it is normal I dont like to see my temp guage go ever 220 on anything I drive.
 
Having a 1993 Pickup with a 5.7 , I can add my two bits . I had 200-210 degree temps with a/c on and moving . Upgraded to a HD fan clutch on a HUNCH and I have much lower temps rolling , and never goes over 210 at idle in traffic .
 
I just wanted to really thank everybody, I made it back. truck still runs 210 and up to 240-260 when its shut off, I think I will get a elect fan to help.
thanks again I was ready to start changing parts at autozone, with there crappy loaner tools.----------Jeff
 
All engines temps climb 40 degrees when they shut off and getting an electric fan won't affect the temp in the engine, just the radiator because the water pump isn't circulating any coolant when the engine is off. I would save my money unless you want to free up some hp by running an electric fan. Don't sweat your temp (no pun intended).:haha:
 
I wanted to try to find a fan that blew after I turned to motor off. (if they make that). Just to help and free up hp.
 
You can wire it up to a switch . I am sure you can find some timer as well. But what we are all saying is if the motor is off it cools the radiator , not the engine. Unless you get an electric waterpump as well. But really your temp is fine. not really anything to be worried about. Get some water wetter , and be done with it.
 
No fan, fan clutch, radiator, hose, anything.... will help to keep it from getting hotter after you shut it off. It's heat soak, as the coolant stops moving the residual heat soaks into the coolant more effectively than when coolant is traveling.

Your actuall internal cylinder temps are likely not getting any hotter after you shut it off, there's no flame left!:wink1:

Also, 240* on a dead engine isn't a problem.... there's no movement, no compression, and no pop.

Like I just said, your cylinder temps likely aren't going up, it's just the heat from the iron soaking into the coolant and concentrating around the coolant temp sending unit.

If you don't believe, let the truck sit for 20+ minutes and then fire it back up. Right away that guage should start cooling down and should even go below your running temp, then come back up a minute or so later to your 210* running temp. Why is that?.... the coolant soaks up a bunch of cylinder and head heat because it isn't being moved, then once moved again, carries a bunch of heat away and fresh cooler coolant flows in.

Don't worry about it man.
 
"Like I just said, your cylinder temps likely aren't going up, it's just the heat from the iron soaking into the coolant and concentrating around the coolant temp sending unit. "

Got it thanks,
 
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