My 2004 Pontiac grand prix has a steady clanking noise from the engine and gets worse with acceleration. Any ideas what it might be?

Jonathan Huff
0

Asked by Jonathan Feb 24, 2014 at 12:33 PM about the 2004 Pontiac Grand Prix GTP

Question type: Maintenance & Repair

7 Answers

FordNut
42,745

Loud? Thrown piston rod, broken valve stem or such,.....not so loud? Valve tappets, something on serpentine belt pulley, there is a LOT of guesswork here

1 out of 1 people think this is helpful.
Norm Davis
3,125

Did it come on suddenly (cracked flywheel), or is it getting worse over time ? (rod bearing).

Jonathan Huff
0

Happen suddenly. I was going 75 thru I95 from jackson mi to BC mi and back and it just happen

Jonathan Huff
0

Well both my bosses just saw my car and claimed its a piston rod and motor. Idk

Norm Davis
3,125

Piston rod bearing is a reasonable guess. There is virtually no test to confirm this without tearing down the engine. If the engine is running okay other than the noise, its worth fixing.

munron
1,735

While I generally agree with Norm's advice I'd disagree on this one. It's 10 years old and not worth much. There's a ton of hours involved in a job like that plus the parts. I'd start looking for another car.

Norm Davis
3,125

Thanks Munron, yes it is a lot of work. The 3.1 engine was very popular and is available all over the place. You can get a running engine for as little as $300. But the total labor to replace a rod bearing might not be worth it. Before trashing the car, I would pull both valve covers and make sure it isn't something easily fixable,such as no oil pressure, a stuck valve, bent pushrod or collapsed lifter. Just because 3 people say it "sounds like a bad rod" doesn't mean that's the problem. Dig a little. Good luck!

Your Answer

Add photo

Related Questions

  • 2004 Pontiac Grand Prix Ask me any questions 18 answers

    I have totally replaced and rebuilt this car. I have experienced some major obstacles and solved them. I have experience with this year model Grand Prix. I may be of some help to others.

    2004 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Grand Prix stalls out when accelerating 2 answers

    My 2004 Pontiac Grand Prix will stall out if I press on the accelerator. I have ran codes and they come back MAP and MAF sensors are bad. So I replaced the MAP and cleaned the MAF and reset the codes....

    2004 Pontiac Grand Prix GT1

    -

    Maintenance & Repair

  • noise also when turning right 31 answers

    We have a 2004 grand prix and it makes a noise everytime we turn right the sound is the same as if the sway bar is broke (we know this because that happended 4 mnths before this). This has been going ...

    2004 Pontiac Grand Prix GT1

    -

    Maintenance & Repair

  • Car doesn't move after stepping on the gas pedal and makes loud noise? 4 answers

    I have a 2001 Pontiac Grand Prix GTP and just recently my car shut down on me. The problem seems to be that when I step on the gas pedal it just makes a loud rattling/clanking noise and the care does ...

    2001 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

Grand Prix
Looking for a Used Grand Prix in your area?
CarGurus has 3,931 nationwide Grand Prix listings starting at $1,900.
ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 2,110
#2 Tom Demyan
Tom Demyan
Reputation 1,680
#3 John Saffrahn
John Saffrahn
Reputation 1,120
View All

Related Models For Sale

Used Chevrolet Impala"
1,213 Great Deals out of 56,785 listings starting at $1,295
Used Pontiac G6"
264 Great Deals out of 5,845 listings starting at $1,999
Used Pontiac Grand Am"
27 Great Deals out of 1,830 listings starting at $750
Used Chevrolet Monte Carlo"
44 Great Deals out of 1,780 listings starting at $1,999
Used Pontiac Bonneville"
16 Great Deals out of 736 listings starting at $995
Used Ford Mustang"
639 Great Deals out of 34,182 listings starting at $995
Used Chevrolet Malibu"
1,105 Great Deals out of 59,058 listings starting at $900
Used Pontiac GTO"
4 Great Deals out of 285 listings starting at $7,988
Used Honda Accord"
1,135 Great Deals out of 61,116 listings starting at $899
Used Nissan Maxima"
465 Great Deals out of 13,475 listings starting at $1,800
Used Nissan Altima"
1,568 Great Deals out of 84,709 listings starting at $995
Used Ford Fusion"
1,270 Great Deals out of 66,366 listings starting at $2,495

Used Cars For Sale

2005 Pontiac Grand Prix GTP For Sale
3 Great Deals out of 64 listings starting at $3,918
2004 Pontiac Grand Prix GTP For Sale
6 Great Deals out of 146 listings starting at $2,995