Deez Nutz 08

I am new to this forum, but I am not new to useing the search function on a forum, I spent about 4 hours looking for answers that I have not found yet. I have a '90 pickup w/ a 22re. We just rebuilt the entire top end and it ran perfectly for 17 days counting this morning coming to work. I fired it up to make a run to the dump and as soon as it got up to operating temp, the white smoke started barreling out of the exhaust pipe. No coolant in the oil and no oil in the coolant. Compression test was good, spark plugs look good, Idles fine, runs fine, it just waits untill it is warm then starts puking. any suggestions beside sell it and get a real truck.

Flash319

Sounds like your head gasket is gone. You are burning coolent. Did you surface the head before you put it back on?

86Toyrunna

im thinkin head gasket

yodercrawler55

im havin the exact same prob but im hopin coolant is getting through my intake manifold rather than the head cuz it was rebuilt 10k ago

1dirtyota

My 91' is doing the same. checked compression: good. took off ex manifold and intake. so far nothing. Next... off with it's head!! let me know if you find anything.

yodercrawler55

will do

desert-rat660

if you didnt resurface the head thats probably the culprit

Deez Nutz 08

The head was resurfaced, and this motor had the same exact symptoms a few days after I bought it, and that is the reason for the top end rebuild, when we pulled the head off, the gasket was fine but there was coolant on top of the pistons. Some how coolant is getting into the intake manifold and running through the combustion chamber and out the exhaust. Again no oil in the coolant and no coolant in the oil. It does not do it when it is cold, only after the engine reaches operating temp. When we had it apart we checked every surface with a straight edge and feeler gauge and everything was good. Kinda stumped but am sure it is not the head gasket.

Lumpy

Sounds like the head, possibly a gasket in the intake??? Coolant runs through the intake, so it could be leaking there. Run with the rad cap loose so it does not build pressure. The intake maybe cracked? Pull the intake and see if there is coolant in the intake. Is the coolant in all the cylinders or in just 1. Who did the motor? Here is a good thread on it if your interested. Not sure if you read this or not, great read though...


https://www.yotatech.com/forums/f116...nt-pics-88722/

yodercrawler55

Deez sounds like he is having the same prob as me. I only got to pull off the throttle body last night but there was a bead of coolant in the throttle body. Thats the only place coolant runs through around the intake right? I looked inside the intake and it looked like wet tar inside there!

Deez Nutz 08

There is coolant in all of the cylinders and in the intake,it is an new intake manifold (because I broke the orig. one when I was removing it, don't ask) and there are no cracks in it that the crack check could find,my father and I did the motor he is a mechanic but has little experience with Toyotas as do I. It ran fine for over two weeks then all of a sudden ... you know the rest.

Flash319

The only spot that coolent gets close to the intake is at the TB for the idle up valve. Maybe it is leaking some how? Once it closes off it leaks that is why it only does it when it is warm.

Deez Nutz 08

I took the 2 hoses off that hook to the idle air control valve (which is brand new also) under the throttle body and hooked them together to bypass the valve and that did nothing for the problem. runs fine on cold start up untill it gets up to temp just at idle.

yodercrawler55

i never thought of bypassing it to test to see if the throttle body is leaking. I'm doin that tonight, if that doesn't work well......then its getting ripped apart.

Rocketwrencher

Look up thermagasket on the internet. It worked for me. See my post titled thermagasket results.

1dirtyota

I tried 3 different kinds of rad gasket sealer. Didn't work. I took apart my intake amd found oil (looked like oil) in all four air chambers of lower intake. Does anybody know how that could happen?

Lumpy

The PCV valve??? Does it feel like oil or just really dirty water???

1dirtyota

drop of water fell on it. it floated like water in oil. maybe be gas? didn't smell it.

Lumpy

Only if carbed...even then I don't think you should have puddles of gas in the intake IMO. Not sure though, have not had an intake on a carb apart in many years to recall.

1dirtyota

No its efi. thinking if puddles are gas. maybe be from cold start injector?