Topic: cooling system issues

[jspd234]

22re, rebuilt head, new head gasket, water pump, thermostat, heavy duty radiator, lower hose. around town 190 degrees, up a hill at freewAY SPEEDS TEMP GETS UP TO 225 DEGREES. I'M STUMPED any ideas??

[axled89]

did you burp the radiator.  does your headgasket go on self explantory.  or can it go on up side down and ass backwards???  maybe partily pluging a water jacket hole.

[79coyotefrg]

whats the thermostat temp?  dont use one over 180*

has the timing been set correctly??   cam timing could be off 1 tooth.

did you use a felpro head gasket??  if so  get rid of it now.

[emsvitil]

whats the thermostat temp?  dont use one over 180*

Why?

I don't have any problems with the stock 192.......

[Cheesemaker]

Is your clutch fan working?   

[jspd234 [OP]]

i forgot to add that i have a new fan clutch as well. i don't know what temp thermostat i have. its whatever napa auto parts gave to me when i bought all the parts.

[jspd234 [OP]]

timing done by a great independent toyota shop called "c&t automotive" in san mateo so i trust them plus i really doubt timing is an issue because it wouldn't pass smog 'til it was timed properly.

[2manytoys]

Was it ok before all this work and new parts?

Are you getting enough airflow at highway speeds? Anything on the front blocking air to radiator? My 8274 winch isn't a problem at low speeds but over 65mph during Phoenix summers it gets hot.

If you have an auto trans with a problem it dumps a lot of heat into cooler in rad.

Don't know if this happens on Toyota's but, I have seen lower radiator hoses suck shut at high rpms.

Just throwing some ideas out there.

[THE ROCK]

 :twocents:cooling systems arent the only thing that will cause a vehicle to run hot...1-timing?? mentioned previously by someone else tooth off..2-fuel mixture-lean will make it run hot, especially when climbing long grades/ inclines/ summits

[jspd234 [OP]]

it all seemed to work ok prior to all the new stuff but i never had a mechanical temp guage prior, just the factory toyota guage that read in the "normal zone". i can probably rule out air flow at speed as well because even though i also have a winch and ac condensor in front it also gets hot when i am wheelin' at slow speed. i guess what i'm saying is it only gets hot "under heavy load". the other possibilitily could be the trans thing. i installed an automatic trans out of a 93 t100 pickup and when i go on the highway, after it is up to temp, the trans goes into and out of overdrive once in a whila all by its self and the overdrive light flashes as if to tell me there is an issue. that does not explain the slow speed high temp though(at least the od issue) when i'm in trans low, t case low and 2nd t case low. so .....it is a prob that i need fixed . any other ideas will be considered!!!!

[2manytoys]

If the problem started after the automatic installation stick a temp gauge on your trans. A slipping trans or bad converter can dump huge amounts of heat into the radiator trans cooler.

A mismatched converter with too high of a stall rating can also create a ton of heat. If your trans checks out OK maybe you will need an auxiliary trans cooler.

Is your trans fluid burnt? Still just throwing ideas out there.

[-Matt-]

just another idea

pull the thermostat out and let it run for a few minutes, leave the radiator cap off and see if there are any bubbles flowing in the radiator. make sure its almost topped off so you can see if you have bubbles.

if so, it could mean that the head gasket didn't seat fully. did he use an oem head gasket?

this is what you dont want http://www.youtube.com/watch?v=7UyhjT7nWY0&feature=related

[2manytoys]

So did you fix it? What did you find?

[jspd234 [OP]]

changed out new napa t stat for a new factory toyota t stat, added an auxillary trans cooler, new trans fluid with only 1 light hollister trip on it and a few runs thru town on it(problably less than 250 miles on the new fluid).added water wetter to cooling system. checked to make sure fan clutch is working properly(it is). stock converter came with trans with a 6 month warranty 1.5 years ago when i got it from LKQ(a used parts company) still the same result, 190 idling or 200ish around town, 225 degrees once i go up hwy 92 and get up to freeway speeds. i'm starting to lean towards an internal trans issue because even though i haven't officially tested the trans fluid temp with a guage or thermometer, the auxilliary cooler tube was hot as all hell to the touch! going to try to temp guage the hot fluid in the next couple of days....stay tuned

[jspd234 [OP]]

with nothing else to lose, i did this burping procedure.

[DTPROFAB]

find a 89 v6 radiator at any store i drive from 29 palms to phx in 130 degree weather with the ac on now i had the same issue before

[jspd234 [OP]]

i already have the v6 radiator. next i will remove the trans lines from the radiator to take them out of the cooling system loop to see if there is a difference. i would assume that if the cooling system stays cool, the prob is the trans fluid is keeping the cooling temp up indicating a prob in the trans.

[jspd234 [OP]]

so... i removed the trans lines from the radiator and ran them only to the auxillary cooler. no change in temp. still went up. and as a side note, overdrive light still flashes when in overdrive on the freeway indicating some sort of trans issue although no slippage that i can tell. then i removed t stat and drove it. temp still went up although not as high this time by only 5 degrees or so... i am stumped. next thing to do is take it to a shop to get diagnosed. i think i've done all i can... 

[2manytoys]

Are you sure you have an accurate temp gauge? Maybe it's not as hot as you think.

Another thing many people don't realize is how much the coolant/water ratio affects cooling. 100% coolant will overheat an engine and cause other problems. It's easy to accidentally put full strength in thinking you have 50/50 premix.

You may already know this stuff and have already checked it. Just throwing a couple more ideas out there.

[-Matt-]

did you check for those bubbles in the radiator?

[2manytoys]

What did you find?

[jspd234 [OP]]

no bubbles coming out of radiator after warmed up without a t stat. i am starting to lean towards maybe an inaccurate mechanical guage as well. no boil over, no steam ever. coolant temp is while idling is 146-152. 177-180 after a drive up the hill checked using an infared thermal pistol grip digital guage. although i am not completely convinced there is not another issue....i'm gonna disconnect the heater core and reverse flush it separately to see if there is any prob there. the quest continues.....

[2manytoys]

Did you get the problem resolved?