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12-07-2006, 07:24 PM
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#1
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,213
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LS1 piston slap or knock?
I went to look at an 02 Z28 today and it has higher miles on it. Does the LS1 slap/knock go away completely when it warms up or is there still a hint of it even after the engine warms up? It sounded a little more like a faint knock to me rather than piston slap so I'm a little leary. My old 93 would have some piston slap on occasion but it usually went away with an oil change. So should the noise go away or does it linger?
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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12-07-2006, 07:25 PM
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#2
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,473
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All you ever wanted to know and more: http://www.pistonslap.com/
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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12-07-2006, 07:31 PM
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#3
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NJFBOA Supporting Sponsor
Join Date: Jan 2006
Posts: 2,372
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i heard over on ls1tech that some people still have it when its completely warmed up and some it goes away....so take it for what its worth
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www.JerseyDevilDetails.com
2002 Trans am ws6.. black on black bolt ons with a JS built trans, 3200 stall,TTM's w/315's, full umi adj rear suspension, strano springs/sways, and koni 4/4's
2015 Forester XT touring... STI Sway bars
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12-07-2006, 07:34 PM
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#4
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BadMod
Join Date: Aug 2004
Location: hamilton, nj
Posts: 8,889
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thankfully neither of mien make any noise yet
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So much stupid, so little time.
Quote:
Originally Posted by 79CamaroDiva
It started before I drove your car. I just have to look at it the wrong way and your car poops parts.
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Mercerville MotorSports, LLC
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12-08-2006, 12:15 AM
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#5
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Stalker
Join Date: Aug 2004
Posts: 12,078
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mine was always there, worse in the first 15 min or so, but never gone
edit: i thought id also share that mine had oil consumption issues as well.. like many of the 2001s. anyways, when my motor finally blew up(hydrolocked- not piston slap related) i tore it down to the bare block and looked for any damage from the piston slap, and suprisingly i did not see anythign, no scratches, no gouges. the cylinders looked mint so who knows, SOME piston slap cases may just be a cosmetic noise issue.... just wanted to add that...
Last edited by V; 12-08-2006 at 12:18 AM.
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12-08-2006, 01:33 AM
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#6
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12 Second Club
Join Date: Dec 2004
Location: New Providence, NJ
Posts: 408
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Mine is always there also it never really goes away its just a little quieter once it warms up...
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12-08-2006, 01:13 PM
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#7
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13 Second Club
Join Date: Sep 2005
Location: Oceanside, New York
Posts: 557
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Quote:
Originally Posted by NP_00'T/A
Mine is always there also it never really goes away its just a little quieter once it warms up...
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same exact here
but on a side note, my dads vette has none at all.. i dont kno if its the same, just figured it was worth mentioning
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1986 Pontiac TransAm
Drop in K&n, Flowmaster 80 Series, SEIZED 305
2001 Camaro SLP SS - SOLD
2010 2SS/RS Camaro
TSP LT's / !Cats / !Resonator / !Mufflers / Airraid CAI / Hurst 46% Short Throw
Last edited by TransAm619; 12-08-2006 at 01:14 PM.
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12-08-2006, 04:27 PM
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#8
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11 second club / Moderator
Join Date: Aug 2004
Location: West Berlin, NJ
Posts: 7,148
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Im the same as the above. On COLD warm ups its loud for about 15 seconds. Then it quiets down, but if i listen close i can tell its slapping a little. But its just about as loud as a lifter then
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2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57
1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85
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12-08-2006, 10:11 PM
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#9
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12 Second Club
Join Date: Oct 2006
Location: Williamstown/Atlantic City, NJ
Posts: 2,261
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my dad has an 01 silverado w. a nice piston slap- it goes away after it warms up. GM says that there is nothing wrong with that..it's ok- heh.
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2001 SOM Trans-Am WS6 *12.35 @ 114.55mph*
2011 Honda AKA Tori the Crosstour
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