Question:
I have a 1994 toyota pick-up with the 22r engine. The problem is that when I get going on the highway for 10 mins. or so with the heater on, after initially allowing the truck to idle, my temp. gauge gets up to the red line. I've just shut off the heater and that has solved the problem. My worry is that something is wrong with the gauge and the truck is still too hot, plus I want to keep the heater on for longer than 10 mins. There is no coolant smell in the cab and the level seems to be ok in the radiator, so I don't think its the heater core or low coolant levels. It could just be the thermostat, but does anyone have other ideas of what this might be?
Answers:
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start small/cheap try new thermostat next check to see that the radiator cap is holding pressure. If the cap and thermostat are good open the cap and run the engine at idle till the thermostat opens see if you have good flow across the top of the radiator by looking down the spout. I had a 22r engine in a toyota truck that did the same thing changed thermostat and cap then water pump and fan clutch but it still got hot. It ended up being the radiator was plugged with corrosion 125 dollars for new radiator. Problem solved. Good luck .What would be the best!?!?!?!?
Try the simple approach first, a new thermostat, only a few bucks.Why Replace Anti Sway bar End Links?
Run the motor at just above idle for about 10 mins,while the engine is warming keep your hand on the radiator near the top hose.when the theromstat opens the top of radiator will get hot suddenly.If it only warms slowly with no rush of hot coolant it means the thermo isnt opening.Fit a new one.I was told that i need new rear rotors and brake pads and a brake system flush. Is the flush needed?
Having the heater on will pull heat away from the engine and turning the heater off would only help make the engine warmer, not cause it to cool down to the normal range. Try this: Get an infared pyrometer and point it at the point on the engine where your temperature sensor is after letting the truck warm up. If it is in specs (probably around 190-210 degrees F) then your temperature sensor is most likely faulty. If your engine really is getting too warm, replace the thermostat because it may have frozen shut (if this is the case, your radiator would not be warm from the engine). When you change your thermostat, also replace the coolant your drain with new to make sure you have the correct coolant/water mixture. Hope this helps.More Questions & Answers ...
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