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Engine Rumbling/Knocking, HELP Please :)

C

crusinchub

New member
SO i just bought a 97 gtp sc, it's got some issues that i figured a car it's age would have, passenger window wont go up... when i listen to the engine with my window down i hear a rumbling, like i can hear the pistons. Seems louder than i think it should sound, but i have no idea how it should sound. Guy at Jiffy lube told me it could be the exhaust manifold. I need some idea of what it could be.
 


Any SES lights? Pull the spark plugs to see if any of them are damaged...might have a chipped piston but not likely...or try to get a video of it?
 
What are SES Lights? I guess i could take a video, the engine seems to operate ok. nothing really lacking power, just noisy. like i can almost hear the pumping.
 
No, there isn't service engine soon lights on. Jiffylube guy told me it sounded like an exhaust issue, but it sounds close to the motor, cuz i can hear the pistons pumping, idk. would take the exhaust off be very difficult?
 


i dont have a camera. I also dont have the supercharger belt on. I have no idea how to get it on. i tried to put it on one day. found the piece that moves, but still doesn't want to fit. I think the guy at autozone gave me the wrong belt.
 
This is straight from ZZP on most any belt you'll ever need...

Stage 2 IC
685 - 6-rib, 3.3"+
680 - 6-rib, 2.90" - 3.20"

08-685 - 8-rib, 3.0" - 3.20"
08-680 - 8-rib, 2.60" - 2.90"

Stage 3 IC
680 2.6-3.0
685 3.1+

25060721 72.625" stock bonneville
25060716 72" for 3.4" bonneville

25060670 SS IC with 3.2+ SS IC

4060660 - GTP/GS/SS supercharged with 3.2 - 3.5" pulley

4060650 - GTP/GS/SS supercharged with 2.9 - 3.1" pulley

060716 - Bonneville SSEi with a 3.4" pulley

060670 - ss IC with a 3.2"+ pulley

060667 - Stock GTP or ss IC with 3.0" pulley

675 - Gen 5 blower S3 core 2.3"-2.55", Stage 2 core 2.4"-2.60" pulley

060680 - ?Stage 2 intercooler 2.6 - 2.8" pulley
Gen 5 blower S3 IC 2.6"-2.9", S2 IC 2.7"-3.0" pulley

060685 - Gen 5 blower, stage 3 IC 3.0+ pulley
?Stage 2 intercooler 2.9 - 3.1" pulley

060915 - Stock accessory belt for '99-03
-also works with either UD WP pulley or OD alt pulley but not both

060923 - Accessory belt for 99+ with UD WP pulley and alt UD pulley

060905 - Stock accessory belt for '04+


060935 - Stock accessory belt for 97/98 (94")

060938 - Accessory belt for 97/98 with underdrive pulleys

060970 - SS M90 for 97/98
060950 - SS M90 for 99+



915 99-03 stock accessory belt

923 99-03 for underdrive water pump and Alt pulley

905 04+ stock accessory belt

935 97/98 stock accessory belt

938 97/98 for underdrive water pump and Alt pulley



667 stock S/C belt for GTP, GS, SS

658 GTP, GS, SS S/C belt for 3.5-3.25 pulley

650 GTP, GS, SS S/C belt for 3.2-3.0 pulley



721 stock Bonneville SSEi Supercharger belt

716 Bonneville with 3.5-3.25 S/C pulley



875 99-03 accessory belt with Meziere water pump

864 04+ accessory belt with Meziere water pump

895 97/98 with Meziere water pump



685 S/C belt s2/s3 ic 3.0-2.8 pulley (depends on tensioners)

680 S/C belt s2/s3 ic 2.7-2.55 pulley (depends on tensioners)



670 S/C belt ss ic with 3.2+ pulley

667 S/C belt ss ic with 3.2-3.0 pulley
 
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