ok this is what i have done

replaced water pump (napa)
blew/pressure washed radiator with it out of truck
acid washed inside radiator (works good no leaks)
changed thermostat (cummins)
flushed system with water and rad clean
new cap 16# non LEAVER TYPE)
put on an a aftermarket catch can (holds 1quart its out of a 900 turbo sabb)
and filled with water only

after all that ...

it got hot i have the stock gauge and a aftermarket up by the thermostat
and both would say hot now when i get into the throttle the system can push up to 2-1/2gal of water out....why?

so i think the T-stat is messed up i take it out......
fill the COLD system up with 3-1/2 gal of CAT ELC antifreeze i go for a drive and i drive like iam being followed by a cop and it pushes coolant out one catch can full so i collect that back into an antifreeze jug i go another 5 miles down the freeway and i see red stripes on the hood i collect another can full and i collect one more in another 5 miles and after this it runs normal so i think yea iam done.....

nope i was doing a little hot rodding tonight and i look down and the coolant gauge is on the H the aftermarket is 130 (cuz its out of water)

whats the deal can the water pump be pushing it out can it not be pushing enough water and letting it boil and creating to much pressure and blowing it out?

its got no t stat so its a completely open system it should be OK the next resort is jumping it off the local cliffs so help me out

 

Any indication of combustion gases or oil in the coolant? What about water contamination in the crankcase, milky oil?

 

Kinda sounds like a blown head gasket...

 

yeah

 

Might also be a crap water pump. Heard that some of them are bad right out of the box.

 

Sounds like a the head gasket to me too.

 

none had a sniffer test for comb gas nuthin cut the oil filter abart ant looked for pleats in the paper (this tells if waters been there) and none



thanks

Brice

 

I ran into this on my dads 6.2. The gasket(s) leaked just enough to where it would overheat, but not contaminate the engine oil with water. Your engine is 20 years old and gaskets don't last forever.

 

ok but it still pukes fluid out even when its stone cold it only pushes it out at high reves when your driving it like you stole it would that still be the gasket?

 

did you run the sniffer test while it was under boost?