22re how hot is too hot?

[anthonyz]

Hey guys, got a 864runner with the 22re. My temp guage is not working so I threw in a aftermarket one to help observe my temps. my temp seems to range from 190 anywhere up to 230. not sure if the 230degrees is too high, and the haynes book hasen't been very helpfull here. Any help here would be appreciated!
I'm thinking about changing the t-stat, any idea which to run for CO?
Thank you,Anthony

 

[black95]

Stock thermostat is 190* for fuel injected, 180* for carb. 230 seems high, but it depends on when it is 230 as to if there is a problem. If it heats up going down the highway, that's bad. You might need a new fan clutch or the radiator might need to be flushed out. If it heats up when you are warming the truck up, then comes back down, you may have the two stage thermostat. If it heats up when idling, that could point to the fan clutch as well, but most likely you have a head gasket problem. Change your radiator cap first. For every pound of pressure, your boiling point goes up like 10 degrees, if you're not holding pressure, your antifreeze is going to boil at 230.

 

[anthonyz]

Ya, think ima burp the system. @ idle seems to hang out right at 190, drove it back from my buddies place out east. ran around the 190 as well, but when I got into town it would go from 190-230 with the stop and go traffic/warm weather. From what I hear you saying I think I'm alright

 

[anthonyz]

thanks btw

 

[mountainmanryan]

I had problems with overheating in my 22re 2nd gen 4runner. Replaced the cap for $6 and it went away. Also discovered that the little plastic fan for the AC condensor was froze up on the mesh cover. Freed that up and the temp dropped some more.

 

[black95]

Ya, think ima burp the system. @ idle seems to hang out right at 190, drove it back from my buddies place out east. ran around the 190 as well, but when I got into town it would go from 190-230 with the stop and go traffic/warm weather. From what I hear you saying I think I'm alright

It could very well be that your fan clutch is not working as well as it should. Easy to check when the engine is good and hot, turn off the engine and spin the fan, it should be stiff and not spin easy. It should also make that roaring fan sound when you rev the engine. There are several posts in Ih8mud about replacing the oil in the stock fan clutch, but to tell you the truth....I would just replace it. Replacing the oil is for sure cheaper, but people seem to have mixed results with re-oiling them. That's only if the cap and thermostat don't fix it. I am not at all saying you are O.k. If you are running hot now, it's going to get way worse on the trail in the summer.

 

[PPFJ60]

My aftermarket temp gauge reads between 190 and 230 as well. When I connected an engine diagnostic tool to the computer (88 Chevy 350) the diagnostic tool read the coolant temp to be 15F lower than my after market gauge. Now I don't worry about it unless the aftermarket gauge approaches 230 or higher.

 

[anthonyz]

Hmmm, might go to a autostore and run my car with one of their diagnostic machines after work here too. Changed the cap/ will do the t-stat afterwork and check out the fan clutch too.
Thanks for all of the ideas guys!

 

[EricG]

I've got one of those laser thermometer things for my birthday recently - new toy
I wonder how accurate one of those would be as another data point? I'll try to remember to bring it along tonight.

 

[black95]

I've got one of those laser thermometer things for my birthday recently - new toy
I wonder how accurate one of those would be as another data point? I'll try to remember to bring it along tonight.

Aimed at the top of the radiator, I'm betting that would be your most accurate representation of your actual engine temp. I've been wanting one of those, you lucky dog

 

[anthonyz]

Yep fan clutch needs done/new tstat is in.
Hopefully it stays nice after work today.
I took another looks at my fluids and they look perfect, took the rad cap off while warming up and nothing happend. Looks like the head gasket is ok, and the clutch fan is what's causing my issues.
Thanks guys

 

[EricG]

Aimed at the top of the radiator, I'm betting that would be your most accurate representation of your actual engine temp. I've been wanting one of those, you lucky dog

I thought those had become pretty standard kit for electricians? I've seen them used to look for hot spots in panels.

 

[black95]

More so for HID lighting ballasts and motor bearings. We have a fancy 11,000 dollar camera for that