LB7: coolant loss overheating???

[770JOHNNYW]

Hey guys i think i have one of those wierd cooling system problems...I started smelling coolant coming through my a/c about 2 weeks ago, didnt really think anything of it b/c i replaced the busted heater core fittting on the firewall..just thought some maybe driped on the fins of the core when the fittin went or somthing??? Now just once in a while ill look down and it will be running hot, steam/coolant will blow out the coolant tank overflow hose and it cools right back down. Replaced the thermostats just cause its easy...no luck. If i pressurize the system it will slowly leak down but no external leaks. None in the oil or trans and it seems to heat up a little when i get on it. The upper rad hose will feel like its about to explode even if you start it cold......Any clue thanks for the help sorry so long

 

[TrentNell]

Sounds like a head gasket to me , the hard radiator hose and blowing coolant out the over flow is either a injector cup or head gasket .

 

[770JOHNNYW]

with no coolant in the oil you think its burning it???

 

[770JOHNNYW]

The tight hose is due to compression getting into the cooling system is that correct?

 

[TrentNell]

with no coolant in the oil you think its burning it???

Yep

The tight hose is due to compression getting into the cooling system is that correct?

that is correct , my headgasket would blow coolant out everytime i hit WOT but was fine unless i floored it .

 

[770JOHNNYW]

Damn i almost got my other lb7 done to but i guess ill be fixing this one now....to bad i cant just swap em just waiting on heads and twins:thumb: how long you think i could let this ride Trent? Maybe i should take the hot tune out!

 

[Vrabel]

sorry to say my friend, HG

 

[770JOHNNYW]

yea oh well thanks for the help guys!!!!!

 

[68skylark455]

Is there any black residue in the coolant tank? Thats what has happen to us. Eats coolant but doesn't leak it outside. Finally got the black death in the bottle and now we know where the coolant is going

 

[duramaxstacks]

same thing happened to me the black residue in the tank and bubbles when running.just finished the head gaskets i think the original problem was that my rad plugged up so it overheated mine was losing coolant and as soon as it started to warm up the temp just shot right up.