[omegablue333]

I recently picked up a 92 4x4 pickup with a 22re motor. I searched around the forums for a while but a few threads visited the subject but really didn't go too far into it.

When I start up it up after its been sitting for a while, I get some whiteness coming out the exhaust. It's enough to make me notice but not enough to scare me into not driving it. When I start driving and it warms up, it completely goes away. No issues with over heating so far. I drove it from Bellingham, WA to Lynnwood, WA (around 90 miles) and didn't have a problem. Plus the other day I got stuck in heavy traffic going to work and still no over heating problem. I'm going try to go buy a pressure tester after work today plus check my coolant every so often but what does this sound like to you? From what I've read it sounds like a head gasket thats starting to go but when it warms up things snug down to make a seal. Thanks for the input

 

[phburks]

it's most likely just condensation that has built up in the tail pipe while the truck is sitting. it's not doubt cold up there, and while the truck sits the cold air around condenses any moisture in the tailpipe. when you start the truck it takes a brief period for it to burn off, then it's gone.

double check that your coolant level hasn't changed, but i really doubt it's anything to worry about.

 

[toytruck89]

i agree. and double agree if you have a catalytic converter. A natural byproduct of the catalytic converter is good ol' H2O.

but you should always check the compression, just to be sure. and look for runs at the block/head mating surface. But it's probably just condensation. good luck

 

[V62WDLongbed]

H2O is a byproduct of combustion, no catalytic converter required. If you are not loosing coolant you don't have a problem.

 

[fourwd1]

If you're worried the white exhaust might be burning coolant, check your oil.
If it looks like a milkshake, you have a problem.
Also check coolant level, if it's frequently low, there's a problem.

 

[toytruck89]

H20 is a byproduct of combustion, but the heat usually separates it into HC (hydrocarbons) and C0/C02 before it can make water. Those molecules are slightly easier for it to form than water is. The catalytic converter has paladium/cerium/platinum that help to "catalyze" HC and C0/C02 where the water or water vapor collects at the slightly lower temperatures.

Drill a hole at the exhaust after your cat and watch it drip.

 

[omegablue333]

I checked my coolant tonight and found that it was missing about 3/4 a liter of coolant. Haven't done a pressure test yet but will tomorrow when I get to my garage. Not sure how fast of a lose that is but I did drive about 120+ miles in the last week. Pressure test will confirm tomorrow what I want to know.