OK,

About every second day I have to add a pint or so of antifreeze, I can't find it on the ground, I can't find it under the rug I can't find it on the block I can't find it in the oil. Any idea's, I am guessing the head gasket, but I do not want to pull the head until I am sure, any good way to check this sucker out?

Thanks for the suggestions!! Beforehand!

 

your having the same problem as me !! when someone tells me whats up on the HELP! forum....you will know.

 

any vapor in the exhaust?

also, it could be leaking only under pressure, low somewhere you dont notice because it's only dripping hot going down the road.

 

Mine had a coolant leak about a year or so ago.
I looked everywhere and couldn't find it.
Eventually it stopped leaking and it wasn't until I later pulled the exhaust
manifold to put an HTT on that I found the leak.
One of the freeze plugs had a pin hole that I didn't notice.
Just something to look for.

Winner

 

you may find it by doing a pressure check while engine is cold or hot, worth a try.

 

do you have a 53 block??

 

I had a 93 Bravada that did the same exact thing.

The truck always ran GREAT until one day I was pulling out of my parking space.... and the BAM!!! Sombich locked up without any warning!

 

Yes, I have been looking under the truck by the heat exhanger and nothing!!

 

I am trying not to sound to stupid, but how can you tell, with the 370's I get a whiteish/grey haze all the time?? I cannot smell antifreeze in the exhaust (I know that smell in a gasser)??

 

1. white/blue smoke=normal at startup and below 10 degrees out.

2. blue smoke=burning engine oil.

3.black smoke=rich fuel air mixture, engine under labor, usually when rpm's cannot meet desired rpm's from injection pump linkage position.

4.white smoke=unburned fuel,usually timing or fuel delivery,sometimes may be vapor from bad head gasket,cracked or warped head or cavitation erosion.

you really have to look close to tell if the white smoke is fuel or vapor. fuel will hang around when vapor will quickly disapear.

 

I had the same problem - radiator was oozing at seam of tank. Not enough to get to ground at first but eventually go that bad. Pulled the radiator and crack ran about half way down edge from top. Radiator guy at Sapp's in Garner told me he sees alot of these in exact same place on gassers and diesels. No repair for the crack as it is metal crimped over plastic tank.

PS - we need to get together to check the timing.

 

When is a good time for you??

 

I have ths white smoke, how quickly will it disappear? Is this only on startup or all the time?

I have lots of black too, but I know why

 

the vapor would be all the time. like a dryer vent in your house. it looks like smoke on a cold day but quickly disappears.

don't rule out a leak, try folding up dry newspapers and zip tie them up under your radiator shaped like a gutter.

go for a ride, then check to see if there still dry.

 

don't rule out a leak, try folding up dry newspapers and zip tie them up under your radiator shaped like a gutter.

go for a ride, then check to see if there still dry.[/QUOTE]


why not just pressure check the cooling system???