Thread: Just bought a 2004 Grand Prix Gtp Comp G but many problems..

try bleeding the coolant system. It sounds like there is still a bunch of air in it and thats causing it to run hot.

As for fuel mileage, since the air filter and plugs and wires were done. I want you to try and clean the MAF with maf cleaner and I would prolly change the front o2 sensor.

Originally Posted by ThingaMagid

How do you bleed the coolant system? And how do you clean the MAF? All the mechanics I go to are no help. They have absolutely no idea what they are doing.

run the car from cold till warm, leave the radiator cap off,(wait for the fan to come on) follow the top rad hose to the engine, on top of the thermostat there a brass screw, open it up a few tuns when the bubbles stop and a steady stream of coolant comes out, its done, tighten the screw up, fill rad, and cap it.

Originally Posted by Fivefingerdeathpunch

try bleeding the coolant system. It sounds like there is still a bunch of air in it and thats causing it to run hot.

As for fuel mileage, since the air filter and plugs and wires were done. I want you to try and clean the MAF with maf cleaner and I would prolly change the front o2 sensor.

o2 sensors ain't cheap. clean the MAF first. since you've been having a mechanic do work, here's what you do.

Buy:



Get access to the object on the far right with wires going to it



and spray according to direction on can.

Note: take it out of the car, don't spray it into your intake lol

Some guy said the car was overheating because of my water pump, but I did not trust him. Could this be true?

Originally Posted by Fivefingerdeathpunch

try bleeding the coolant system. It sounds like there is still a bunch of air in it and thats causing it to run hot.

As for fuel mileage, since the air filter and plugs and wires were done. I want you to try and clean the MAF with maf cleaner and I would prolly change the front o2 sensor.

Is there a way to know when you need to change the lower intake gasket?

Originally Posted by scottydoggs

are you losing coolant with out seeing a leak?

you may be due for a lower intake gasket, the shops in queens are going to rape you on that one.

Ok awesome, thanks so much.

Originally Posted by scottydoggs

yes air in the engine, the s/c oil needs changing like every 30,000 miles, or so heres a vid how to do it, YouTube - ‪HOW TO CHANGE THE SUPERCHARGER OIL ON A GM 3800 SERIES II V6‬‏ get new oil from a GM dealer only.

Thanks a lot for the info, it really helps.

Originally Posted by matt5112

yes.

There is a plug on the front of what we call the "snout" which is the part with the pulley on the end, that bolts into two other peices that make up the blower.

The fluid can be sucked out with a syringe and some tubing.

Then go to the dealer and ask for two bottles of supercharger fluid.

fill till its at the bottom of the threads of the plug. (make sure the car is level)

Gotta take the engine cover to see that though.

I'd suggest throwing out the engine cover. Just makes things hotter and decreases the life of everything.

If you're in a bind, Mobil 1 5W-30 is a GM approved temporary solution for southern states all year 'round or summer only in northern states.

water pumps work till they leak like mad,(and then they still work) or seize up, so i would say no.

best way to check the lim is to have the cooling system pressure tested.

overheating could be caused by a bubble in the line. do you hear gurgling on takeoff from the passenger floorboard? front bumper, you can check gmpartsdirect.com



part 1 is 365 bucks.

sunroof sounds like maybe it could stand to be greased in the tracks

mpg's could be a number of things. do you see white smoke pour from the exhaust?

Originally Posted by ThingaMagid

Is the bubble in the line the same thing as air in the line?

yes air in the engine, the s/c oil needs changing like every 30,000 miles, or so heres a vid how to do it, YouTube - ‪HOW TO CHANGE THE SUPERCHARGER OIL ON A GM 3800 SERIES II V6‬‏ get new oil from a GM dealer only.

gmpartsdirect.com: Alternate GM Catalog

^link to bumper information

are you losing coolant with out seeing a leak?

you may be due for a lower intake gasket, the shops in queens are going to rape you on that one.

Originally Posted by ThingaMagid

I hear gurgling in the beginning when I take off, but that's about it. And I do see white smoke from the exhaust.

gurgling means there's air in the system, common issue and easy fix, just bleed the system. white smoke (thick white smoke) means you're running rich aka too much gas going into the engine and not all being burned off, which explains your bad mpgs. since you had a mechanic do the tuneup, i'd say double check the spark plugs, make sure they are gapped correctly and that they aren't saturated with fuel. You can check the gap with this



probably 2 bucks at your local parts store, just ensure that the space is .060" (IIRC that's the right gap for stock gtp) does the engine feel like it runs rough? cleaning the MAF may help slightly, o2 sensor may also be the culprit but might as well try the cheap and free stuff first

i dont want to confuse this guy, but

white smoke is coolant,

black smoke is fuel (aka real rich)

and blue smoke is oil


no?