Ok, a few weeks ago, my water pump started to go, so i replaced it with a new pump, thermostat, coolant sensor and res cap. I was having a problem before with the coolant overflowing. After I replaced everything, it seemed fine but its still boiling over. I have to add coolant every 2 weeks. The temp stays at bit above the half mark. I also have a fan bypass switch that is on all the time. I dont get it. What elese can it be.
did u do a coolant system flush? How old is the rad could have some blackage, Any rad hoses colapsed?.
Try replaceing the coolant resivor, there pressurized and the slightest pinhole will cause you problems. Othere than that, time to move onto the radiator and hoses as said above.
Boiling over or pressurized excessively?
My guess might be a bad head gasket where engine compression is being forced into the water jacket of the engine thus over pressurizing your cooling system and pushing out the coolant.
Not hard to figure out if you got some basic shop tools and can pressurize a cylinder, one at a time.
Dave
Thats what I was thinking as well Dave
- 2004 Cavalier - 124k, owned since new
Another sure way to tell if it is a head gasket just pull the plugs and check them. If they are very white it it a tell tale sign of coolant being burnt. Or just turn engine over without the plugs in and see if any coolant flies out. Kind of rudimentary but works.Make sure your cooling system is free of air also. There should be a bleeder somewhere.
Victor Mandy Jr wrote:Another sure way to tell if it is a head gasket just pull the plugs and check them. If they are very white it it a tell tale sign of coolant being burnt. Or just turn engine over without the plugs in and see if any coolant flies out. Kind of rudimentary but works.Make sure your cooling system is free of air also. There should be a bleeder somewhere.
Well, not always.
I've seen engines that leaked compression into the cooling jacket but never coolant into the combustion chamber.
MOST of the time, you are correct. The water in the coolant "steam cleans" the plug as well as the head and valves (which you cannot see without removing the head).
His idea is worthy of a look. Cheap and easy. Just be smart and only pull the plugs on a cold engine. Doing so on a warm or hot engine you run the risk of pulling the threads out of the head along with the plug. Most don't know this and wonder why their plug hole is suddenly screwed up. Odds are, if the gasket is shot, the plug will be absolutely clean, not 100% fool proof though.
Dave
ive seen coolant into the combustion chamber quite a few times, just pressure check the coolant system they make a tool for this. pressurize the system, let it sit on there for a few min and then look for leaks
I think there is some with leakage in coolent pipe....it is needed to be checked.....it is very necessary....if coolant will leak fully the engine may seize.......
