Last post on Jul 28, 2011 at 8:56 PM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Sedan
#4178 of 4457 Supercharger rattle
May 23, 2005 (4:24 am)
I have 1998 Pontiac Grand Prix GTP with a 3800 supercharged engine that I bought new, it now has 104,000 miles. It has been great, but now I have a loud rattle when sitting at a stop light(while in drive). Once you start moving the sound goes away. I took it to the dealer and they originally said that the tensioner and some pulleys were going back which was causing the noise. Once I spent $600 for those parts, it did not fix the noise. Now they say it is the supercharger bearing making the noise. You cannot buy just replacement parts for the supercharger, you have to buy a new one from GM or after market. I hate to put too much money in it. Two questions: (1) They said I could possibly get 10,000 to 40,000 miles out of as long as I don't mind the noise. Is this true? (2) What will happen when it goes totally bad or locks up? Will it damage the engine? (3) How can I confirm that it is the supercharger as I don't have much confidence in the dealership? (4) Any other advise that I should do, wait or buy an after market refurbished one? Are they easy to replace?
Thanks in advance for any replies!!!!
May 26, 2005 (4:17 pm)
My 2002 runs hot when I first start driving it after it has sat for awhile or overnight. The temp. gauge comes close to redline; I can pull over, turn it off then start it right back up and the temp gauge goes right down to normal. Also the low coolant light comes on pretty often but its not low or leaking. Also, sometimes just giving it a good rev will make the temp go right down immediately. Does this point to anything specific to anyone? Maybe just a faulty temp gauge?
Thanks in advance
#4181 of 4457 Like to know the Coolant used in 2004 Pontiac Grand Prix GTP
Jun 02, 2005 (6:02 am)
I would like to know the coolant details for 2004 Pontiac Grand Prix GTP...Can any one help me giving the details for the coolant ??
#4182 of 4457 Re: 2001 GTP Questions...... [mrsb]
Jun 02, 2005 (6:19 am)
You need a coolant sensor, about $35 from the dealer. Common problem.
#4183 of 4457 Re: Like to know the Coolant used in 2004 Pontiac Grand Prix GTP [kanth]
Jun 02, 2005 (8:29 am)
Grand Prix - Coolant info. from manual:
The cooling system in the vehicle is filled with
DEX-COOL® engine coolant. This coolant is designed
to remain in the vehicle for five years or 150,000 miles
(240 000 km), whichever occurs first, if only
DEX-COOL® extended life coolant is added.
The following explains the cooling system and how to
add coolant when it is low. If there is a problem
with engine overheating or if coolant needs to be added
to the radiator, see Engine Overheating on page 5-27.
A 50/50 mixture of clean, drinkable water and
DEX-COOL® engine coolant will:
• Give freezing protection down to −34°F (−37°C).
• Give boiling protection up to 265°F (129°C).
• Protect against rust and corrosion.
• Help keep the proper engine temperature.
• Let the warning lights and gages work as they
Notice: Using coolant other than DEX-COOL® may
cause premature engine, heater core or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs first. Any repairs
would not be covered by your warranty. Always use
DEX-COOL® (silicate-free) coolant in your vehicle.
What to Use
Use a mixture of one-half clean, drinkable water and
one-half DEX-COOL® engine coolant which will
not damage aluminum parts. If this coolant mixture is
used, nothing else needs to be added.
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch fire and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL® coolant.
Notice: If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost would not be covered by your
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core and
If coolant needs to be added more than four times a
year, have your dealer check the cooling system.
Notice: If you use the proper coolant, you do not
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful.
- from pages 5-24 / 5-25 of the 2005 manaul.
2004 is likely also online.
Not sure what you’d need this info. for unless you have the car - and a (printed) manual. . .
#4184 of 4457 SPARK PLUG REPLACEMENT
Jun 02, 2005 (6:00 pm)
HAVE A 2000 GRAND PRIX GT 3800. HOW TO REPLACE #6 PLUG, WITH WHICH THE PLUG WIRE IS UP AGAINST SOMETHING GOING INTO THE EXHAUST?
#4185 of 4457 Re: 2001 GTP Questions...... [mrsb]
Jun 10, 2005 (7:24 pm)
Ok, brace yourself. I had that problem about two months ago. Atleast the same thing kept happening to me. The tire problem. Pontiac is dumb and the wheel well just isn't that big. I dont know why, but thats what the people at my dealership told me. The low coolant is a big deal. Get your headgasket checked if its at all possible. My headgasket just went about a month ago and i had to sink alota money into my car, and i was without a vehicle for about 10 days. They had to replace the entire headgasket and it was a small fortune. If your car starts randomly getting hot and then cooling down really fast thats gotta be what its from. And its not a temp. gauge problem...the car really is that hot when it says it is. I hope that thats not your problem but if so, good luck.
#4186 of 4457 GXP impressions
Jun 13, 2005 (11:15 am)
I have posted info regarding my initial impressions of my Grand Prix GXP on the Future Vehicles \ GXP board.
Just f.y.i., as the GXP has been in production for a while, and is now available. . .
Happy Grand Prix GXP driver . .
#4187 of 4457 Re: GXP impressions [rayainsw]
Jun 13, 2005 (1:38 pm)
Kirstie will move the disucssion over here to Sedans eventually. Congrats on your new ride!!!