My 1993 22re (416k miles) is using lots of water. 50 miles will use a pint+ of antifreeze. I can't find a leak. The exaust was driping so we rebuilt the head, new gaskets, checked for cracks, etc. No water on the carpet from the heater core, no water in the oil (before or after the rebuild). Any suggestions as to where it might be going?
had a similar problem with my '85. finally ruined one head by erosion. loss of water promoted erosion of the aluminum head, leading to a major failure and a new head
problem ultimately turned out to be a water hose that loops around the thermostat housing.
never could see any leak, just the occasional two drop spot on pavement after short run.
finally took 10 day vacation and let it sit. when I came back, ran the truck around the block (half mile), then popped the hood. Saw a steady stream of drops underneath. bear of a time to actually pinpoint the source of the leak. caught a glint of sunlight in a tiny arc of water coming up out of that hose and landing a ways back on the intake and dripping down from there.
anyway, check your hoses.
do NOT let the engine run low at all. it may not over heat, but hot spots can develop, and that can lead to erosion.
Hey moose...I have an 86 22R. If the water was leaking from the timing chain housing, "where" would it go? I'm really surprised replacing your head gasket didn't fix the problem. I'm no mechanic but I'm a little surprised you didn't replace the guides (and maybe the chain) when you did the head. Don't you have to remove them when you do the heads?
Anyway, I've been losing water for years! Mind you, I don't drive it much, and I never take it out of town...but 2 years ago I noticed i was blowing great gobs of steam out the tailpipe. I thought my goose cooked...but then...I threw some more Barrs Leaks in the rad, replaced the thermostat and rad cap, and I've been OK ever since. Except once when I noticed the head gasket was spurtin' coolant and then I simply plugged it with epoxy putty.
oh, and BTW, my TOY has been suffering from what I believe is chain "chatter" for years. I've never had it officially diagnosed
but I noticed a lot of slop in the chain when I adjusted the valves a few years ago. I suppose it could self destruct at any time...but then these motors are somewhat indestructible...
I should have replace the timing chain when I did the head. At the time, I didn't know that the "clatter" I have been hearing was from the chain and it was eating away at the cover.
The timing chain only has to be removed from the cam shaft when the head gasket is replaced. I didn't have to touch the housing. However, since my chain clatter is wearing out the timing cover because the guides are long gone, I will be replacing the timing chain, guides and cover next weekend. Maybe that's where my leak is.
If it is leaking, the water goes into the oil. I have started watching the oil level to see if it fills with water.
I just wish I could see any signs of antifreeze ANYWHERE!
Frustrating. If this doesn't work I'll try the overnight pressure test. The local Autozone rents the tool. Right now I don't think it holds any pressure.
Thanks for everyone's ideas.