Wednesday, September 14, 2011

Replaced head gasket and water pump in 96 Neon but still overheating, why?

We let it idle for about 15 minutes and it kept at the perfect temperature but no heat came out of the vents. After 15 minutes it started to overheat and sucked up all the antifreeze in the reservoir but I am not sure how much was in there to begin with.



Is it possible that after the coolant started flowing and filling out the system that it needed more since there was none poured directly into the radiator and that caused it to be at an inadequate level?



Also there is a small crack right down the thing that the radiator cap screws onto and I noticed water dribbling out of it. Could that maybe be causing it to overheat? Someone said a bad radiator cap could make it overheat so I figure that a crack on the thing that the cap screws onto could cause problems too. What do you think?



Also the engine oil has stayed at the same level but is discolored due to lucas oil treatmeat since we couldn't flush the whole engine. Someone also said oil/coolant mix could still remain in the valves and other places since we didn't flush it out and could also be giving it a slight discoloration. The oil is still slippery and looks perfect if the car is not running and sits for a while.



So what do you think...I am going to leave it alone until I can get that cracked thing replaced but I don't want to if the car is a goner. Some also say the head could have been warped so changing the head gasket could have been useless.



Just looking for some opinions on what could be causing it to overheat stillReplaced head gasket and water pump in 96 Neon but still overheating, why?
Could be air in the coolant system. But if you had to replace the head gasket because of coolant leak in too the oil. You could have bad bearings on the lower end that will make it run hot also.Replaced head gasket and water pump in 96 Neon but still overheating, why?
Sounds like you are spending a lot of money, before identifying the real problem.



20-20 hind sight.

1. in the process of replacing the head gasket, the head and block should have been measured to make sure they are not warped or cracked.



2. you need to totally flush to the oil and coolant. Coolant in the oil ruins the bearings and other moving parts.



3. the cooling system needs to be pressure tested, all of the leaks and blockages identified, and repaired.



The Neon is great car, better than more recent Chrysler offerings, and like anything it needs to be properly maintained.