Piston stop issues

[toupee]

Hey all.  I ordered a proform piston stop from summit to find top dead center on my 383.  906 heads.  The piston stop does not thread properly into the plug hole.  It seems to be too big.  I Contacted summit and they sent me another one.  Same problem. Anybody else had problems like this with these stops?

[metallicareload99]

I had a similar problem with my POS MoPar Performance piston stop.     It seemed too big, or different amount of TPI than the spark plug hole.  I haven't tried to use it since.  Thanks MP   

[lazarus]

 Comp Cams sells a couple different size stops. Mine is an MP with a longer bolt for the stop. Works fine with my Edelbrock heads.

[Nacho-RT74]

piston stop? whats that ?

[aifilaw]

its what people with money buy... we use pencils, pens, brazing rods, welding rods... or whatever else fits in the hole

[toupee]

 
I ended up using a wratchet extension after I sent the stops back.  I was cheaper so I guess I'm not upset that the piston stops didn't fit 

[375instroke]

I removed the center of a spark plug with a hammer, tapped the metal threaded part, and screwed a bolt I rounded off the end of through the center.

[Ghoste]

I have a stop from MP that works fine but I've had it for quite a while now so maybe the older ones were different.  What I need to be looking for though is all this money I evidently have. 

[mikepmcs]

piston stop? whats that ?

Provide a positive stop for the piston when locating true TDC (Top Dead Center), for camshaft degreeing. Made to screw directly into the cylinder head spark plug hole. Machined from brass to prevent piston damage, and incorporating an air bleed hold to prevent compression build-up while turning the engine over.

v/r
Mike