Erik Beeman

I'm having a overheating problem, and I cannot figure it out. I've replaced the thermostat with a factory Toyota one, I replaced the radiator cap, I've flushed the system many, many times, and I've replaced the water pump. I can't figure out whats wrong. It's not the head gasket, it's not burning any coolant. What's happening is it's getting so hot, it's boiling over and throwing all of the coolant out into the overflow tank, then thats over filling and dumping everywhere, then of course it just goes straight to red. What I can't figure out, is I've left the thing running for 20 minutes in the same spot, no air flow, and it'll go up a quarter way, and sit where it's supposed to. It'll do this everytime, no worries, but as soon as I start driving, the needle just moves straight towards red. Literally, with no stopping. Takes maybe 3-4 minutes of drivinig and I've got to shut it off. This is a 92 22RE. I had the same problem with my 88', and I replaced the thermostat and cap, and it solved the problem. I can't figure this one out.

ZUK

iTrader: (1)

Time for a brand new radiator

Erik Beeman

Thats along the line I was thinking. Clogged maybe?

BigBluePile

iTrader: (3)

Maybe you have a airbubble in the lines somewhere? It could be clogged, just have to pull it and take to a shop and have it flushed.

Junkers88

Someone else here had that same problem on the same engine and it was the radiator hoses. They were falling apart inside and when you got the rig up in the higher rpm (driving) one of the hoses would get blocked off with a "flap" that had torn loose on the inside. At idle it wasn't an issue and would apparently idle forever at the proper temp.


Are the hoses on yours in good shape? I know it sounds strange but stranger things have happened on these rigs.

If that's not it I'd have to say the radiator needs to be recored or flushed.

Erik Beeman

The radiator hoses are in good shape. Nothing brand new, but they are perfectly usable. I've checked the insides while I had the radiator out of the truck. When you say flush, whats the difference between what I'm doing and what a shop does? Do they use compressed air? I've flushed it for 30 minutes with the drain plug on the bottom open, motor running, and garden hose in the top to refill.

Junkers88

My mistake. I typed in "flush" as a standard response to over heating problems, even after I read that you've done it several times. Sorry about that.

Erik Beeman

I'm stumped. LOL

Skoalbandit

x2 on the new radiator. call 1800-radiator they have good deals on them sometimes.

Just Learning

try running with thermostat not installed, to see if you didnt get a bad one, could the engine jackets getting clogged, but i have gotten thermostats brand new that have been faulty not often) i have also gotten spark plugs that have been bad??go figure

Erik Beeman

I have a new radiator on the way. I'm done dicking around with it, I just want it to run right. Thanks for the input.

Windsor

You sure it isn't the head gasket?

toyota4x4907

Is the anti-freeze/water ratio at least 60/40, respectively? Try a higher anti-freeze ratio like 70/30.

Erik Beeman

Positive. I've been thru 2 head gaskets on my 88, I know how it acts and what it looks like when a head gasket is gone.

No, it was all water, because I kept losing it all thru the overflow, and I wasn't going to spend $13 a gallon for antifreeze when I was losing it all within minutes

Erik Beeman

I got it fixed. The new radiator was here first thing Monday morning, I got it installed and all is well. The cause of all this, was a 9" crack along the top of the radiator. I already had the new radiator, but I wanted to see if I could repair the old one (for s and giggles), so in the pictures, you will see a long bead of solder along the edge. Thank you every one for input and help. With a new radiator, water pump, flush and new fluids, the thing runs outstanding. Goes a quarter way up on the needle, and stays put. I am happy.

crafthorse

Did the Rad cure it?

Erik Beeman

Yes. The were a crack in the old radiator, which was letting it boil water out when the pressure built up. I thought I was losing it all thru the overflow tank, but it was leaking from both the tank and the radiator. It runs wells and does not overheat anymore. On a cold night while driving, I can't get the needle off of "C"........which is not necessarily a good thing, but it's better than overheating it.