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?

Was the timing belt installed properly ( all cams & crankshaft lined up properly) Most popular problem. Air in the cooling system , bad thermo, or bad water pump? Does the fan work without ac on? Sounds like T belt story

fans came late on those car,like 212 and second fan comes on at 224,you reprogram it to come a lot sooner,,other thing is there might be gunk inside the block,and coolant has hard time to pass through,and staying longer than enough in block temp goes high,even tough the radiator is doing it's job,it is just coming out block lot hotter than it suppose to be,and gauge read the block not the radiator

For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.

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.

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,
netvan

I would do a sniff at the tail pipe to make sure you are not pumping coolant out the exhaust pipe.
sound more like a bad gasket than a bad water pump to me.

I'd still check the thermostat. Or basically just replace it. Have you ever drained all the antifreeze and flushed the system? Good time to do both. If the hose's get real hot that doesn't really mean the thermostat open. Wouldn't they get hot even if the thermostat didnt open.? If the thermostat was stuck open you'd would have cold air and low temp gauge. Then maybe hit a pump or something and have the thermostat stick closed and have high temp. Maybe water pump. Check it when you have the belt off. Spin, pull & push the water pump pulley around. I'd replaced my water pump at about 110,000 on a '97 dodge Dakota. My 97 never had a very good heater. Always heated up more after driving. Idle never got it warmed up.

Check the water pressure in your engine system. You could have a cracked radiator core, or tank, or a leaking water pump, or hose, or a weak radiator cap that will not allow the pressure to build up in your engine and move the heat around as is required.

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.

Your dash needs to come out. These bulbs push into a plastic piece that "twists" into the back of the dash board. (About a 1/4 turn) Unless you can get at them from underneath, but I think it's to tight.

there is a sending unit for the guage.but if it has been running a few minutes and gets hot you may need to check the thermostat or water pump.check the water pump by taking the radiator cap off.then start the vehicle,look into the radiator and see if any coolant is flowing or circulating.do the cheapest fix first