Thread: Used Piston Question

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  1. #1 Used Piston Question 
    GTX Level Member acidcrashdburnd's Avatar
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    I have a set of L67 pistons with unknown mileage, I can say the bearings looked like crap. Should I reuse these pistons? I want to re-ring them and put L32 rods on them with new wrist pins, good idea?
    I bought used Diamond forged Pistons and it turns out my machine shop cant use them as they are collapsed. <- I had to google that...
    2005 GPGT- Top Swapped Click me! 15.5 @109
    2002 GPGT- slow and stock
    1993 Oldmobile 88
    - exploded the diff @158k
    GPF Resident Flowmaster Troll
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  2. #2 Re: Used Piston Question 
    Moderator dsmuts's Avatar
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    What do you mean by collapsed? I'm just wondering as I have nothing to add to this other than I'd run the pistons if they look ok.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  3. #3 Re: Used Piston Question 
    GTX Level Member acidcrashdburnd's Avatar
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    If you google it you get this




    Two of the pistons I bought had that SLIGHTLY

    They are dirty but look good, no valve marks from smack and the sides look good.
    2005 GPGT- Top Swapped Click me! 15.5 @109
    2002 GPGT- slow and stock
    1993 Oldmobile 88
    - exploded the diff @158k
    GPF Resident Flowmaster Troll
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  4. #4 Re: Used Piston Question 
    Moderator dsmuts's Avatar
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    eww looks nasty
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: Used Piston Question 
    GTP Level Member L36 Killer's Avatar
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    So you have just L67 stock pistons? Or pistons and rods?
    "SHELLY" GRAND PRIX GT 02. SLP HEADERS & EXHAUST, K&N CAI, BMR REAR SUSPENSION AND STRUT BRACES, 180 T-STAT, AGX STRUTS, EIBACH SPRINGS, OVERKILL PCM, YELLA TERRA 1.7 ROCKERS, GT1 CAM, SEXMAN PORTED & POLISHED HEADS, STAGE 2 PORTED TB
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  6. #6 Re: Used Piston Question 
    GTX Level Member acidcrashdburnd's Avatar
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    Quote Originally Posted by L36 Killer View Post
    So you have just L67 stock pistons? Or pistons and rods?
    Stock L67 pistons and rods and ****ed up Forged Diamond Pistons with L32 Rods. I'd want the L32 rods on the L57 Pistons.
    2005 GPGT- Top Swapped Click me! 15.5 @109
    2002 GPGT- slow and stock
    1993 Oldmobile 88
    - exploded the diff @158k
    GPF Resident Flowmaster Troll
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  7. #7 Re: Used Piston Question 
    GTP Level Member L36 Killer's Avatar
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    If it were me, I'd just keep the L67 rods. Unless they are completely shot
    "SHELLY" GRAND PRIX GT 02. SLP HEADERS & EXHAUST, K&N CAI, BMR REAR SUSPENSION AND STRUT BRACES, 180 T-STAT, AGX STRUTS, EIBACH SPRINGS, OVERKILL PCM, YELLA TERRA 1.7 ROCKERS, GT1 CAM, SEXMAN PORTED & POLISHED HEADS, STAGE 2 PORTED TB
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  8. #8 Re: Used Piston Question 
    GXP Level Member GTPpower's Avatar
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    As long as they spec out ok, you can reuse them.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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