Proper Placement of piston rods in 2003 pontiac grand am

Asked by Feb 18, 2014 at 05:52 PM about the 2003 Pontiac Grand Am SE

Question type: Maintenance & Repair

When removing the pistons from a gunked up 3.4 L i didn't see that three were marked with the stamp A574 and three marked with B574. Does this mean they belong on one side or the other and which side if so?

1 Answer

4,665

Manufacturers have tolerances they want to maintain between the piston wrist pin and rod. They mark these "A,B,C" etc. If you're not changing rods, it's not really an issue. However... (and this is just from experience) ....if you didn't mark them when you took them out, I would not re-use them. It has nothing to do with the pistons. The rod journals 'mated' to the crank over the years and mis-matching them to a new journal can cause vibration and can shorten the bearing life, maybe by a lot. Do people do it anyhow? Sure. For the labor to put it all back together, and maybe do the whole thing again, I would replace the rods and pistons the first tim

Your Answer

Add photo

Related Questions

  • Proper Placement of piston rods in 2003 pontiac grand am 1 answer

    When removing the pistons from a gunked up 3.4 L i didn't see that three were marked with the stamp A574 and three marked with B574. Does this mean they belong on one side or the other and which side ...

    2003 Pontiac Grand Am SE

    -

    Maintenance & Repair

  • 2003 pontiac grand am 3 answers

    I just put a new ignition in my grand am it's not a transponder key but it won't start and the security light is on why?

    2003 Pontiac Grand Am

    -

    Maintenance & Repair

  • 2003 pontiac grand am gt that stutters 3 answers

    I have a 2003 Pontiac Grand Am GT every time i go to start the car it stutters and once i finally get it started it smells like gas. Once it starts it runs just fine, until i turn it off and have to...

    2003 Pontiac Grand Am GT

    -

    Maintenance & Repair

  • 2003 pontiac grand am 1 answer

    So the font end of my 03 grand am is wrecked and I need to know if its safe to cut out the radiator support because it is all bent and I have a 2000 grand am just like it with a blown tranny but ...

    2003 Pontiac Grand Am SE1

    -

    Maintenance & Repair

  • 2003 Pontiac grand am gt making noises 3 answers

    My grand am is making noises in the dash. Clicking noises

    2003 Pontiac Grand Am GT

    -

    Maintenance & Repair

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,740
#2 John Saffrahn
John Saffrahn
Reputation 1,600
#3 Tom Demyan
Tom Demyan
Reputation 1,470
View All

Related Models For Sale

Used Pontiac Grand Prix
25 Great Deals out of 2,827 listings starting at $1,850
Used Pontiac Firebird
15 Great Deals out of 764 listings starting at $2,995
Used Ford Mustang
682 Great Deals out of 44,482 listings starting at $1,500
Used Chevrolet Camaro
372 Great Deals out of 31,228 listings starting at $2,500
Used Pontiac GTO
6 Great Deals out of 470 listings starting at $6,995
Used Chevrolet Impala
548 Great Deals out of 35,509 listings starting at $899
Used Pontiac Bonneville
3 Great Deals out of 542 listings starting at $1,799
Used Honda Accord
1,050 Great Deals out of 66,925 listings starting at $1,000
Used Honda Civic
831 Great Deals out of 83,705 listings starting at $750
Used Chevrolet Malibu
1,099 Great Deals out of 79,828 listings starting at $2,500
Used Toyota Camry
1,221 Great Deals out of 82,694 listings starting at $750
Used Nissan Altima
1,282 Great Deals out of 74,438 listings starting at $1,000

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.