I have a 2003 sunfire.. Today a knocking sound started when I push on the gas.. I checked a website with sounds from motors and it sounds like one I found called slappingpPistons? How much of a problem do I have on my hands

Asked by Apr 02, 2015 at 07:15 PM about the 2003 Pontiac Sunfire

Question type: Maintenance & Repair

2003 sunfire knocking, slapping Pistons?

5 Answers

7,675

Slapping pistons don't just suddenly happen, could be rocker arm noise. have you checked the oil level?

I feel like I put oil in it all of the time.. I checked the oil less than ten mins after I noticed was a quart low so I out in 10w30..taking it in tomorrow for a check up the knock may have been there for a while maybe my muffler is kind of loud and once the car gets speed the sound isn't noticeable but when I start speeding up it is loud

7,675

Definitely get it checked out.

25,835

If it is in the bottom end (pistons, crank, rods) it's a rebuild (or you could try to nurse it along with various oil additives) . If the noise is from the upper end (valves, lifters, rockers) it's a much easier repair. You can isolate the tick/knock from a bad rod/piston bearing by pulling the plug wire for each cylinder in turn and running the engine, and see when the noise goes away.

1 of 1 people found this helpful.
635

If it is a rod knocking, you will destroy the engine block in a short time.

Your Answer

Sunfire

Looking for a Used Sunfire in your area?

CarGurus has 302 nationwide Sunfire listings starting at $2,100.

ZIP:

Pontiac Sunfire Experts

  • #1
    John Saffrahn
    Reputation
    2,760
  • #2
    Joeyadams
    Reputation
    1,320
  • #3
    Warren0007
    Reputation
    1,250
View All

Related Models For Sale

Used Chevrolet Cavalier
3 Great Deals out of 954 listings starting at $1,000
Used Pontiac Firebird
8 Great Deals out of 806 listings starting at $3,295
Used Pontiac Grand Am
1,090 listings starting at $1,599
Used Pontiac GTO
11 Great Deals out of 460 listings starting at $5,995
Used Pontiac Grand Prix
37 Great Deals out of 2,754 listings starting at $1,200
Used Ford Mustang
744 Great Deals out of 42,177 listings starting at $1,300
Used Chevrolet Impala
575 Great Deals out of 34,588 listings starting at $1,250
Used Chevrolet Camaro
418 Great Deals out of 31,676 listings starting at $2,395
Used Honda Civic
794 Great Deals out of 76,594 listings starting at $888

Used Cars For Sale

2005 Pontiac Sunfire For Sale
60 listings starting at $2,650

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.