Question about 1992 Toyota Pickup

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Erratic idle- 1992 toyota Pickup, 22Re

I just replaced the radiator cap, and the thermostat, and i was told that my cooling system probably still has an air pocket in it, what is the best way to get this air pocket out?, right now, it trickles fluid out of it while it is running into the overflow reservoir when it is idling irraticly, but when i add fluid when its cold to the radiator it gets pushed out thru the overflow, so how do i fill it, without it pushing more out? a radiator cap causing all of this is retarted, what can i do?

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Sounds like head gasket ???

Posted on Jan 01, 2009

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1992 toyota 22re overheats after driving fine at highway speeds, starts to overheat when coming to a stop


It could be that your radiator is clogged up. The temperature in my truck went considerable down and has stay that way after I changed the radiator. See if cleaning it with pressure water helps.

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Probably the timing chain has jumped a cog. Aim a timing light at the timing mark and ensure that it stays in one place when idling. If it jumps around erratically the timing chain has jumped. If not that it could be the fuel filter, plugs and or wires, etc.

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Car over heats within 30 min. after starting


Thermostat is bad or the head gasket is blown, Test on cold engine, first remove radiator cap, start engine and observe coolant in radiator, you should not see any air bubbles being produced by the engine as it warms up, some coolant may slosh out so locate a drain pan under car to catch any overflow, keep pets away from coolant!
If air bubbles are present the head gasket is suspect, further testing with a cooling sytem pressure checker is required to confirm the diagnosis. I had a 22RE in a 94 Toyota Pickup that had a warped block causing a blown head gasket. Not a cheap repair if it is.

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Be careful with radiator caps, never remove one while the engine is hot, scalding is a most unpleasant experience.

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1 Answer

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Try with the small stuff first. Replace the thermostat. Before you do that, you should flush and refill your system with just water after the flush process. The bottle of solution that you put into your radiator to flush it and clean it has instructions, follow those. Then let the car cool down and drain the system and refill it with fresh water only. Run this water for a bit and then do it once more. Once cooled back down , replace thermostat and replace the 50/50 mix of antifreeze and water.
Check engine oil level as well, low oil will overheat engines quickly.
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !!
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !!!

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1 Answer

I have a 94 toyota v6 pickup, just replaced the radiator. topped off coolant, ran for approx 10 mins. temp gauge move to nomal operating temp. then turned on a/c to put a load on it, the temp then went up....


Did you recheck the water level at the radiator filler cap after the engine was at normal temperature (ie after about 15 mins idling with heater control on full and fan on Low) because it sounds like there is an air lock in the system. Air lock should clear after thermostat starts to open. This is indicated by the top radiator hose becoming hot to touch.

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2 Answers

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If your car is running hot after replacing the thermostat try flushing the radiator which will usually make the car run cooler. Antifreeze raises the temperature of cars a bit and is not needed during the summer months if you live in a warm area. Make sure you put some in though by the time it becomes winter. There may be a lot of gunk in there that is causing it to heat up especially if any radiator leak was ever added to the system.

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1 Answer

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No. The IAC valve controls the idle of the vehicle, and not the cooling. Most likely has a bad radiator and thermostat. See if running the heater on high heat and high fan brings the temps down. If it does, this is the problem. If not, possibly fan not turning like it should.

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2 Answers

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I hate to tell you but most likely your head gasket is blown. But first have your 13 psi cap pressure tested. If the head gasket has blown out in between the cylinder and the water passage , engine compression will enter your coolant and over pressurize the cooling system. This could be caused by a pin hole in the head gasket and that is all. also make sure your head is not warped. The 22re has a cast iron block and aluminum head causing the head to expand at a different rate than the block. causing the gasket to wear and leak. Good luck.

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1 Answer

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sorry i still think its a gasket problem,or water ports---but without bringing it to yard for me to have a look its a bit difficult and iam in spain.These *** motors use a smaller rad cap with two seals in ,so it can draw the coolant back in on cooling,but iam of the opinion that its drawing in a slight water ingression causing the idle problem.Go on give it a birthday and pull the head off and check its level and not warped ,also the water ports are not dissolved to any extent.

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The thermostat is located at the end of the upper radiator hose. Were the hose connects to the top of the engine on the passenger side of the valve cover on the engine. I believe the housing takes a 12mm socket. Don't for get to get a new gasket for the thermostat housing, how thermostats come with the gasket. I also recommend changing your radiator pressure cap 13psi.

Here is a picture:
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