I have something similar.
My engine will run about 45 minutes before it overheats due to lack of coolant.
The coolant dissappears, then it starts to overheat, the vapor bubbles into the plastic overflow tank.
1. I blew up the radiator water hose because the excess of pressure.
2. It blew the "low coolant" sensor out of the radiator.
3. It blew the radiator side reservoir because of the excessive pressure.
The overheating tents to find a path of least resistance to vent, blowiing the weakest links in the cooling system.
It appears this is caused by a leak in the intake manifold that drains the coolant.
I will have this gaskets replaced tomorrow.
Will post results.
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Originally Posted by SukedowN
I have a 97 3.1 Lumina that had a front end collision back in 01, and since then I haven't driven it. I recently crashed my Jimmy  so I needed a vehicle, and embarked on a repair mission on the Lumina.
So, a long story short I replaced the smashed leaky radiator, and when refilling after repair I could could only fit 4 qts water into it, and heats up to around 180-200 (above normal temp), no heat comes out, and the water boils into the resoivor tank. Then, it sprung a leak from a small rubber hose underneath the air intake. That hose comes off of a metal hose that runs from the top of the water pump, across the block along the exhaust manifold heat shield, then underneath the throttle body (where it has 2 rubber hoses coming off, 1 of those leaking, going into the block) Is the cooling system clogged? What is the purpose of that hose, what is it? What are other possible diagnosis for this? Also, I did NOT replace the A/C condenser since the radiator support was smashed so bad it didnt fit. Suggestions anyone? Please help. Thanks... |