GM TDC Piston Stop (Hot Rod Magazine)
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Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
GM TDC Piston Stop (Hot Rod Magazine)
According to the June 2004 issue, GM sells a brass, hollow (vents cylinder pressure as you turn the engine over), 14mm threaded piston stop for use with heads on engine.
P/N is 12364087. I haven't checked with a dealer for availability, but thought I'd pass that on to you all here.
P/N is 12364087. I haven't checked with a dealer for availability, but thought I'd pass that on to you all here.
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Joined: Jul 2003
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From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
I may have to look into this.
For reference, here is the info off GM's webiste:

For reference, here is the info off GM's webiste:

12364087 Piston Stop
This piston stop is designed to positively locate Top Dead Center during camshaft degreeing. Constructed of brass and drilled to vent cylinder pressure, this unit screws directly into cylinder head spark plug holes and eliminates the problems associated with locating Top Dead Center when changing camshafts or rebuilding an engine.
Technical Notes: This stop has a 9/16" hex head and 14mm threads.
This piston stop is designed to positively locate Top Dead Center during camshaft degreeing. Constructed of brass and drilled to vent cylinder pressure, this unit screws directly into cylinder head spark plug holes and eliminates the problems associated with locating Top Dead Center when changing camshafts or rebuilding an engine.
Technical Notes: This stop has a 9/16" hex head and 14mm threads.
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From: Staunton,illinois
Car: 1966 impala , 1998 sebring vert,1978 buick regal turbo, 1991 chevy silverado 3/4ton 4x4 lifted
Engine: 283, 2.5,3.8 turbo 350
Transmission: powerglide,auto overdrive, th350,4L80
heck for that price i dont know if id even try to make one they are cheap enough..lol...the stock that it would take and the time to do it ...your better off buyin one id say .....
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Joined: Aug 2001
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From: Pacific Northwest
Car: '85 IROC
Engine: LB9
Transmission: 700 R4
I have one that's all rusty and I can never find it when I need it, cause it falls to the bottom of the box and hides.
I think I'll get one of these shiny new ones!
I think I'll get one of these shiny new ones!
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