Cooling system problem/head gasket?
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Senior User
Joined: Sep 2004
Posts: 177
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From: minnesota
Cooling system problem/head gasket?
hi guys,
I've got a bit of a puzzling problem i was hoping you could help me solve. I own a 1995 bronco with a 5.0. I just recently completed my motor swap into a fresh 5.0. along with a new water pump and radiator. The donor motor is a 5.0. H.0. out of a 1988 Lincoln(80,00 Rebuilt .040 over)My question is why is my cooling system pushing coolant over the top of the overflow tank? The coolant in the tank is ice cold and the upper radiator hose is luke warm and the lower is cooler than that. The thermostat is new too. The truck does this without overheating. The temp gauge stays on the "O" or the "R". I have the supercooling package and the larger fan if this helps. I tried some of that blue devil stuff and it didn't seem to work, even after i drove the truck with no thermostat in it. Still puked the fluid out, at least the coolant was hot this time. I can idle the truck all day long and it won't happen, it only happens if i drive it for awhile. If i can't figure this out i'm going to have to scrap the truck and I really don't want to do that. Any help would be greatly appreciated guys. Ths truck is my daily driver.
p.s. When I originally got the motor and replaced all the gaskets and seals. When I Did the head gaskets I improperly torqued them and didn't torque them down all the way. I found this out after finishing the swap. So i tore the engine back down and torqued the head gaskets down to 85 ft-lbs. Could this be were my problem is? It would be nice if the problem was as simple as a head gasket change.
I've got a bit of a puzzling problem i was hoping you could help me solve. I own a 1995 bronco with a 5.0. I just recently completed my motor swap into a fresh 5.0. along with a new water pump and radiator. The donor motor is a 5.0. H.0. out of a 1988 Lincoln(80,00 Rebuilt .040 over)My question is why is my cooling system pushing coolant over the top of the overflow tank? The coolant in the tank is ice cold and the upper radiator hose is luke warm and the lower is cooler than that. The thermostat is new too. The truck does this without overheating. The temp gauge stays on the "O" or the "R". I have the supercooling package and the larger fan if this helps. I tried some of that blue devil stuff and it didn't seem to work, even after i drove the truck with no thermostat in it. Still puked the fluid out, at least the coolant was hot this time. I can idle the truck all day long and it won't happen, it only happens if i drive it for awhile. If i can't figure this out i'm going to have to scrap the truck and I really don't want to do that. Any help would be greatly appreciated guys. Ths truck is my daily driver.
p.s. When I originally got the motor and replaced all the gaskets and seals. When I Did the head gaskets I improperly torqued them and didn't torque them down all the way. I found this out after finishing the swap. So i tore the engine back down and torqued the head gaskets down to 85 ft-lbs. Could this be were my problem is? It would be nice if the problem was as simple as a head gasket change.
Last edited by TigerDan; Jan 24, 2006 at 12:23 AM.
Junior User
Joined: Jan 2004
Posts: 73
Likes: 0
From: Sierra Nevada Mountains
If it is bubbling out of the overflow tank, it could easily be the head gasket. It would be the exaust getting in to the cooling system. With my experience, the torque, torque sequence, and making sure everything is laying down flat (with the help of dowl pins if it has it) is pretty important. Another symptom would be loosing water and not knowing where it went. It will drain in to the block when the truck is off, and then the starter will send it out the tailpipe.
