Question about 2001 Pontiac Grand Am SE
It is a 3.4L V6 with a new water pump and thermostat..
Looks like the head gasget is gone. to one of the cylinders.
Do a compression test to confirm.
Posted on Jan 01, 2013
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Posted on Jan 02, 2017
SOURCE: my 2000 firebird is overflowing
Exhaust gas is entering your cooling system.
The gases are creating pressure and displacing the coolant out of the heater core hoses..
This will also cause your no heat condition.
The pressure in the combustion chamber at the point of ignition is much greater than the pressure in the cooling system and will cause this to happen very quickly.
There are a couple ways to verify this.
(1) The first thing I would look for and is usually evident is a cleaner than the rest of them spark plug.
A little bit of coolant in the cylinder will really clean out the combustion chamber and the spark plug.
(2) If it isn't real evident at this point, injecting compressed air into each cylinder when both valves are closed will force itself into the cooling system on the cylinder with the bad head gasket.
(3) Because you are not seeing white smoke at this time I would leave a cooling system pressure test to the last check. A cooling system pressure test will only be around 15 to 20 PSI and may take a while for the coolant to show up in the cylinder.
Once you determine which cylinder is leaking you can then opt to repair only that cylinder head gasket. But I would recommend you do them both at that point anyway.
Don't forget to replace the thermostat at the same time.
Might be a good idea to have the radiator checked as well for restriction.
I hope your repair goes well Steve. It will unfortunately be an expensive one.
Thank you for using FixYa.
Posted on Nov 09, 2010
SOURCE: cooling system leak some where
There's a dye that makes your coolant show up neon under an ultraviolet light. Stop throwing parts at it and troubleshoot/inspect, and keep in mind you could have an internal leak (aka intake or head gaskets). Check to make sure your oil isn't milky and/or way overserviced.
Posted on Nov 17, 2011
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