Piston stop tool - Team Camaro Tech
Tech 2001 General Tech questions from 2001
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post #1 of 7 (permalink) Old Sep 26th, 01, 06:09 AM Thread Starter
Join Date: Feb 2001
Posts: 925

How do you use the piston stop tool to mark topdeadcenter, my balancer mark and timing marks are both off? I want to find and mark 0 on balancer and 0 on timing cover???
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post #2 of 7 (permalink) Old Sep 26th, 01, 06:27 AM
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Join Date: Apr 2000
Location: holliston, mass
Posts: 622

Just install it into the plug hole, put the engine just before tdc, twist the tdc checker untill contact is made with the piston top, keep fine tuning this adjustment until it just makes contact at the top of the stroke
Then go to the auto parts store and return it after use
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post #3 of 7 (permalink) Old Sep 26th, 01, 06:46 AM
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Join Date: Sep 2000
Location: Shrewsbury, MA, USA
Posts: 6,509

Disconnect the ignition coil, pull the no. 1 plug. Adjust the position of the crank (with a socket wrench on the crank center bolt - do not use the key) to about 10 degrees BTDC. Insert the piston stop into the cylinder via the spark plug hole extend it down the cylinder bore until it touches the piston. Mark the position on the balancer under the timing pointer. Turn the crank around backwards until the number one piston hits the piston stop again. Mark the position on the damper under the pointer again. TDC on the balancer is exactly halfway between the two marks.

DO not try to move both the pointer and the mark on the damper, you can only move one or the other. You must have a fixed reference point.

Mark Canning
1969 Indy Pace Car
350/300HP RPO Z11
My 69 Pace Car
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post #4 of 7 (permalink) Old Sep 26th, 01, 08:18 AM Thread Starter
Join Date: Feb 2001
Posts: 925

First of all Thanks mark,WHen you say make a mark on the balancer under the pointer, under what number on the pointer? 10before or 0? so what i will be doing is keeping the numbers on the cover for reference, and making the correct and new mark on the balancer?
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post #5 of 7 (permalink) Old Sep 26th, 01, 09:07 AM
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Join Date: Oct 1999
Location: RI
Posts: 2,854

Zero should be TDC. You may want to replace your harmonic balancer or compare it to a new one. The balancer is made of 2 separate parts. If the marks are incorrect it may mean that the outside ring of the balancer spun in relation to the inside. If this happens it is a sign of a defective balancer. IMO
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post #6 of 7 (permalink) Old Sep 26th, 01, 09:18 AM
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Join Date: Oct 2000
Location: Robbinsdale, MN
Posts: 193

Use the zero position on the indicator for all marking during measurements. Temporarily mark the balancer at the 0 position on the indicator when it's up against the stop both directions. Halfway between is the correct zero, which you should permanently mark on the balancer.
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post #7 of 7 (permalink) Old Sep 26th, 01, 09:42 AM Thread Starter
Join Date: Feb 2001
Posts: 925

Thanks that pretty much clears it up, the only thing i still don't know is how to use the tool, does it adjust, well when i go pick it up i will figure it out. THanks
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