Question: Low coolant level warning problem with my 2007 Pontiac G6 3.5L V6. I Added antifreeze several times. My 2007 Pontiac G6 with the 3.5L v6 engine is loosing anti-freeze. We have added several times, but gets low after driving a few weeks. When it goes low, the heater wont blow warm air when sitting at an idle.
We have taken it to a shop 2 times. They pressure test, but cannot find a leak, although we smell it from time to time. What can I do to repair this problem?
Answer: The first thing would be to have a cooling pressure system test done to see why you are low on coolant. Low coolant will cause air pockets, and that is the most likely cause of no heat in the car, as long as the engine temp. is up to normal. Some common areas are of course water pump, hoses, coolant pipes.
There is a technical service bulletin on this car for no heat at idle. There is a procedure to remove air pockets that could be done. The problem with this bulletin, is where did the coolant go to begin with. We have seen several of the 3.5l, and 3.9 V6 engine have leaking head gaskets causing this condition. There are a few other places that are common for them to leak. As with any vehicle, the water pump is common. Also, on the front of the engine is what is called the "Coolant crossover manifold" This aluminum manifold connects the front and rear cylinder heads. A little hard to determine if these gaskets are leaking. You will need a pressure tester and a good eye.
G6 Coolant Temp Sensor Location
2006 Pontiac G6
Engine Size : 4 liter
Question: where is the engine coolant temperature sensor located at?
Answer: Well, first of all there is no 4.0 L engine in a 2006 Pontiac G6. Assuming you have the 3.9L, then the coolant temperature sensor is located on the drivers side of the front cylinder head, just above the transmission.
1997 Pontiac Bonneville 6 cylinder.
Question: Driving down the road the heater will be on blowing warm air, the display on the dash will start flashing and the air turns cold instantly. Thermostat was already changed. What could be causing this. Not leaking any fluid. Fluid level is good.
Answer: The control head flashing is usually a sign of an electrical problem in the control head, not an engine problem. This may be malfunctioning and causing the temperature door in the dash to switch to cold. I believe this model also has what is called a "Heater A/C Programmer" which also controls the temp and mode doors. Would need to be checked out with a mechanic and a schematic to pinpoint the problem.
Pontiac G6 Oil Leak
Question: What is causing an oil leak on my Pontiac g6? The oil is dripping off the bottom of my starter and a drip from above my starter.
Answer: Sounds like the oil pressure sending unit is leaking. This is above the starter.