In cooler weather there is condensation in exhaust and with headers and
3 inch pipes it will be more noticable because the exhaust cools
quicker. Try a low pressure radiator cap (they make a 7 lb one and Napa
carries them) if you think you have a head gasket leak and if you do the
cap will cause a change in it, if no change in exhaust, there is no
leak. Also you did not mention is you were even loosing coolant.
Its my brothers truck and I don't remember if he said he was losing coolant.
But I will ask him. He has been having some trouble with coolant related
things lately. Like a few busted hoses, leaking water pump. And then he
thought that a freeze plug broke. However, the freeze plug thing and the
steam in the exhaust could be the same issue. I haven't looked at it myself.
But I thought if he was getting exhaust on the pipes from the outside it was
a freeze plug but if he is getting steam out of the pipe (more than normal)
than it could be something internal.
I will suggest that he try the radiator cap first though.
The truck is 76 but the engine is a checkers rebuild from 2001. I know that
doesn't mean much but I thought I would mention it.
Cracked or warped head or a cracked block. Small blocks do not take well
to being run without colant. It does not take long to damage one
especailly if it is in a heavy high drag vehicle. Usually the heads go
first and warp or somtimes crack. When they warp the head gasket usually
lets go because head gasket on small blocks need a reason to blow as
they just do not do so for not other cause (unless heads were never
torqued properly at assembly) but coolant problems tells a lot here.
When your vehicle looses its water, you park it and walk or call for a
ride to get more coolant for it, you do not keep driving to get
somewhere. You can nurse it if it is hot and cooling system is intact
but when coolant is missing you can damage motor quickly. Same with oil
pressure problems, you shut it down NOW.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.