I seem to be loosing coolant in my 95 pickup. There is no evidence of a major leak and my exaust is crystal clear, so I am confused as to where it is going, went through about 2 ltrs in a week.

 

Check your oil and see if it looks like a milk shake, you might have a blown head gasket? is your rad fluid a brownish mud colour?

 

oil looks good, and the fluid looks to be green clear. Confusing?

 

The only thing you can do is thoroughly check your hole motor. Look for residue on your rad and fan shroud and wet spots around the hole block top and bottom. Does your truck warm up properly?does the heat work normaly?

 

Any steam? It might be leaking only when under pressure, and just evaporate as it leaks...hence no puddle.

 

The truck heats up fine and blows hot air, I just did an oil change and the isr mod and could not see any leakage, did find a little ps leak, but the engine well has been rust check a couple of times and everything has a little glaze hard to tell if it is a small leak behind the motor. If it is not going in the oil or the exaust I should be ok right? has way more power than my old runner.

 

The coolant could be leaking externally (sort of) into the valley (between the heads). The coolant could also leak down the side of the block and evaporate so you may not notice the leak. Head gasket failures will leak either internally or externally...I would put a piece of cardboard under your truck at night to see if it's leaking on the ground - you then can get an idea of where it is leaking from.
You could throw some stop leak in the radiator and see if that stops your leak? But you should be really careful, watch for any sort of indication that it is over heating. The 3vze is very sensitive to over heating, and you can warp your heads...

 

thanks for the hints. I will look as best I can but there is no steam at all and I have driven quite a bit. Could there have been an air lock some where in the system, I bought the truck from my friend and he sid it took a long time to heat up. I noticed the low fluid and filled it, no it's fine. Are there any fitting that tend to be a problem? Because I think if it was a head gasket I would loose power and have steamy exaust.