had a used engine put in my 2002 GP. left the shop. now when I go left or straight, it sounds like a truck, took it back 5 times, they kept saying number 6 spark plug ( which was changed 3 times. only time it isn't loud is when I turn right. currently it's louder! was told could be wheel bearings need greasing, have you ever heard of this?

Asked by Dec 13, 2015 at 05:12 AM about the 2002 Pontiac Grand Prix GT

Question type: Maintenance & Repair

The noise sounds to me like it stuck in wrong gear. You know like when u
drive a stick, and it in 3rd, when it should be in 4th. It wasn't marking this
noise til that used engine was put in.

5 Answers

59,245

Did they change the lower motor/transmission mount? They should have. These are prone to failure. Check the exhaust pipe at the back of the engine. There's a flex piece there. It's actually part of the catalytic converter assembly. It could be damaged or broken and when you turn the engine/transmission shifts allowing the flex piece to open up and make noise. Since this point of the exhaust is beyond the upstream oxygen sensor it probably won't trigger the service engine soon light and set an oxygen sensor code. HTH. -Jim

125

Not sure of the engine, but this does sound like a bad wheel bearing, The right bearing is probably bad because you said the noise goes away when you turn right, but get louder if you turn left this is because when you turn right most of the weight of the car actually goes to the left, so when you turn left more of the weight is on the right side of the car making the noise, Just replaced mine in my 98 Grand Prix with the same problem as you just without the engine being replaced, I did the wheel bearings myself and saved a ton of money, exhaust leak and engine problem are also a possibility although this seems to be wheel bearings to me.

1 out of 1 people think this is helpful.
59,245

Just remember these are hub bearing assemblies and are not greaseable. HTH. -Jim

125

Yea however told you that they needed grease must not know that the Grand Prix have to buy new hub assemblies not just bearings, got both of mine for about $140, but I bought performance bearings which are a little more.

1 out of 1 people think this is helpful.
3,635

It sounds like maybe a plastic shield or cover in the vicinity of one of the front wheels is rubbing against the tire when you drive. Get underneath, with a light if its dark, and have a look around. All those plastic shields and guards were probably off during the engine swap and its easy for one to get put in wrong, or to come loose.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • noise also when turning right 35 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

  • Passenger side wheel bearing 5 answers

    Ok so a few months ago I got an oil change and tire rotation on my 08 grand prix. Went out for a few hours and on my way home I was following the road to the right and my steering wheel started s...

    2008 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • A Clunking noise when you turn left - then feels like you are riding on a flat tire? 13 answers

    Hi! First off I would like to thank you for taking the time to read and respond to my question :) I have been having a bad shake 40+ mph and really doesn't smooth out (to say it's a balancing issue)...

    2004 Pontiac Grand Prix GT2

    -

    Maintenance & Repair

  • why would a car not start if verified to have full spark and full fuel pressure. It turns over and cranks just fine 18 answers

    I have an 07 grand prix, car just suddenly dies while driving, no stalling or anything, its as if i turned the key off. Its random but usually only does it when its above 85 degrees or so, or hotter,...

    2007 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • Broken timing chain. 3.6 L 24 answers

    I have a 2006 Volkswagen Pasan with a broken timing chain. They say it's a zero tolerance engine and that more than just the timing chain would have to be replaced. Is this true? And if so what al...

    2006 Volkswagen Passat 3.6L

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 3,705 nationwide Grand Prix listings starting at $879.

ZIP:

Search Pontiac Grand Prix Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 3,890
#2 Tom Demyan
Tom Demyan
Reputation 2,580
#3 munron
munron
Reputation 2,060
View All

Related Models For Sale

Used Chevrolet Impala
905 Great Deals out of 35,161 listings starting at $1,700
Used Pontiac Bonneville
9 Great Deals out of 649 listings starting at $1,375
Used Chevrolet Monte Carlo
21 Great Deals out of 1,689 listings starting at $2,491
Used Pontiac Grand Am
1,656 listings starting at $1,298
Used Chevrolet Malibu
1,106 Great Deals out of 82,565 listings starting at $2,328
Used Ford Mustang
533 Great Deals out of 42,627 listings starting at $1,699
Used Chevrolet Camaro
377 Great Deals out of 40,506 listings starting at $3,500
Used Buick Regal
151 Great Deals out of 11,580 listings starting at $1,850
Used Nissan Maxima
364 Great Deals out of 24,282 listings starting at $999
Used Jeep Grand Cherokee
900 Great Deals out of 66,110 listings starting at $1,500

Used Cars For Sale

2007 Pontiac Grand Prix GT For Sale
104 listings starting at $2,995
2006 Pontiac Grand Prix GT For Sale
104 listings starting at $2,000