over heating. im out of ideas

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The easiest way to check a viscous fan is to take a piece of cardboard or something that will not damage the fan and try to stop the fan while it is running at operating temp. If you can stop it without too much effort the clutch is bad.

I'm glad I checked this thread because I am having the same problem on my 88 22-RE. I have recently done (all new) radiator, water pump, thermostat, hoses, timing cover, and fan clutch. We are having a wave of 95*+ days and as I drive around it approaches the red line but doesn't actually get into it. I haven't broke out the thermometer yet but it's bubbling into the overflow when I stop. It isn't using any coolant and I don't see anything in the oil or coolant. I know I need to readjust the valves and maybe tweak the timing and TPS a bit (TPS was bad and I couldn't set the timing and I'm not sure I got the settings just right). Does anyone think that those things may cause a overheating situation? My 87 gets hot if I'm under load for a long time but it is very linear and if I let off it cools down. This one just stays hot till I shut it off. Any ideas?
 
WristPin said:
swapped out fan. no change.

using the infrared thermometer at the upper hose right at the inlet is 178
at the lower hose right at the outlet is 164. should be removing more than 14° i think.
if any one has the same thermomter, could you check yours and see what the difference in heat is please?

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Click to expand...


We could meet up sometime this week if you want to see what my rig is running at with that fancy thermometer of yours.

Mine's always at the half way mark on the gauge. :grinpimp:

And if you don't want to meet up, it's dieseldog's fault. :flipoff2:
 
Check the timing

just a thought
 
this is weird, but plausable:

during the last few weeks it has been hot all day. about 80° and thats the only time ive driven was in the day.

tonite, i drove around, and up that same hill. its about 60°
and that gauge didnt make it past 200° and stayed mostly in the 190° range.

so the 20° difference in ambient temp is being reflected in coolant temp. you know, from 200-220°

so that would mean that the radiator is working? cause its exchanging and radiating heat at the same rate, with the difference of nite and day temps?

so either i should eliminate all day driving :doh: :ban:

or assume there is a clog in the system.

see its weird.

BTW i got the acid, but havent used it. i will tomorrow i think
 
i spent the last few hours flushing the absolut crap out of my radiator and then the rest of it.

i had a quart of muratic acid. poured half that in the radiator, filled it rest of way with water. let it sit for 5 mins.

then flushed the crap out of it.

then did it again, but let it sit for 10 mins, and flushed the crap out of it.

so i put it all back together. went all the way into town, and the gauge didnt go over 190. ( remember i took out the t-stat)
and on the way back she crept up to 200 up that frikkin hill.

i double backed down then up it again to verify. and it didnt get much hotter.

when i got home i used the IR thermo and observed 190 at the t-stst housing.

and i checked the temp drop in the radiator. this time it was 21°

last time it was 13°

so i am sure the mechanical gauge is not 100% accurate, as the IR thermo gives a reading i trust more (its a snap on tool)

so i think i am done f'ing with it.

which makes me one happy mofer



and BTW the tool i used to flush it was somthing i made.

a 1-1/2" dia steel shaft i cut down to 4 inches. drilled and tapped a 1/2" hole in it, down the middle.
on the side at the top, i drilled and tapped a 7/16" hole.
threaded a elbow with a air hose fitting on the 7/16 side.

got some STD pipe fittings to thread on the 1/2" side, to fit a garden hose to.

turned the water on full blast, put 18lbs in the air hose, kinked the air hose, let er fill up with water and unkinked the hose to blast out the water. did this about a hundred times on the inlet and outlet side of the engine, and then separtatly the radiator.

i got tons of this white crap out of the radiator.

and a few little chunks of RTV out of the engine.

im sure this solved the problem.

thanks a lot for the help fellas
 
i'll get some pics tomorrow after work.

it kind of dammed up along the uneveness of the concrete, so it should still be there tomorrow


yeah, i think this would be a good thread for the FAQ
 
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