Question about 1989 Chevrolet S-10 Blazer

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I have 1989 s10 blazer with a 4.3. I have replaced the water pump,thermostat & belt,it still gets hot by the dash gauge it says the temp is 225 is that normal temp?

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I have the same truck, had the same problem. i replaced the fan clutch. temperature runs perfect now.

Posted on Nov 20, 2012

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The normal temp should be between 195 and 220 degrees. 225 is not bad but does seem a little on the high side. Do you see this temp at idel and then it cools down as you drive or do you see this temp all the time? If you see it all the time after the engine is fully warmed up it may be the gauge is a little off or the trump sensor may be a little off. If you see it at idle and then it cools down while driving than you possible have a bad fan clutch. Another possibility is that you have bunch of debris that has built up in front of the radiator on the outside. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Posted on Feb 21, 2012

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Posted on Jan 02, 2017

lebones337
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SOURCE: Temperaure gauge/thermostat 2001 chevy tahoe

yes, your thermostst is sticking open or closed. it is an easy fix and the part isnt that much but you do have to drain some of the antifreeze/coolant out. when you get the thermstat pick up a repair manual for your truck and it will take you step by step.

Posted on Jan 01, 2009

emissionwiz
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SOURCE: replace thermostat 1994 s10 blazer

follow the upper radiator hose to the engine, under the nipple that the hose attaches to on the engine is the thermostat, 2 bolts and maybe a bracket VERY EASY TO DO.

Posted on Feb 10, 2009

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SOURCE: 2005 chevy equinox temp gauge showing hot fan

check the coolant temp sensor

Posted on Mar 22, 2009

  • 921 Answers

SOURCE: my dash warning lights come on while driving

reset the battery wait about five minutes before hooking it up...this is sounding like a computer problem.

Posted on Sep 16, 2009

wracefans24
  • 1985 Answers

SOURCE: 1989 Chevy S10 Blazer, 4.3L V6. 4wd not working.

under the battery is where you need to check first,then follow it down around the right front wheel well,

Posted on Dec 09, 2009

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I have a 1989 s10 blazer 4.3.The temp guage reads 225 is this normal? I have replaced the waterpump,thermostat & belt.


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Running hot after 12 minutes of operation, supposed to have been replaced (water pump, thermostat, and timimng belt, pulled radiator today, it flows but to what extent ??? I recently had the water pump...


With the engine cool, maybe in the morning. If you have some jugs to put water in fill them up, and put them someplace warm if possible, or just use hot water when your ready to work on it. Take the radiator cap off start the car let it run. (we know it gets hot in 12 mins) You should be able to see the fluid in the radiator move quite a bit after it's warm. If what I'm hoping is the problem, the radiator fluid level will drop a lot maybe as much as a third. If this happens add that warm or hot water to the radiator until almost full. It is bound to hick up a time or to so be careful as you said the temp gauge was at 220 degrees. (hot enough to melt your skin off) Give it a few more minutes as thermostat hopefully is opening and closing. After the fluid level in the radiator stays consistent, place cap on radiator. Let it cool off, how ever long it takes would be best if could wait till temp gauge is close to cold start position. Start it up and see if this helps, if they did indeed replace things, which don't always leave a lot of tool marks. Then maybe they just didn't burp/bleed the cooling system of air. So your cooling system will not work as there is no water in the block only in the radiator. This is a long shot, but only take 30 minutes, at most and a little bit of water. Hope this helps, let me know if it does.

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Hello insta5,

There are two temp sensors, one is for the ECM and the other is for the instrument panel gauge.

The one located just under the thermostat goose neck is the one for the gauge. See picture below.



Regards,
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89 s10 blazer 4.3 liter replaced heater coil and thermostat still not blowing good heat now battery indicator light comes on when starting to move.


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I doubt the heating problem is related to the battery indicator unless the fan belt is slipping QUIETLY, but that will not last long, as you will burn through the belt soon.

If you got a good battery and a good alternator then check your fan belt. Remember, check the pressure of the water in the engine block to deal with the heat problem.

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