[DeTomaso] pneumatic kit to find TDC

[Will Kooiman]

I didn't mean to be mean.  MF was mean, but that's just MF.  His normal is
most people's mean.  Damn.  There I go being mean to MF.  ;-)

 

The tube thingie looks interesting, but it's a gadget.  It certainly isn't
accurate.

 

My comments were directed at distinguishing between TDC on the
compression/power strokes and TDC on the exhaust/intake strokes - and not
necessarily at finding TDC accurately.

 

  _____  

From: Ken Green [mailto:kenn_green at yahoo.com] 
Sent: Saturday, November 27, 2010 9:22 PM
To: Will Kooiman; rob at dumoulins.net; fresnofinches at aol.com; michael frazier
Cc: pantera list
Subject: Re: [DeTomaso] pneumatic kit to find TDC

 


You guys are MEAN.

 

The accepted method to find TDC appears to be to insert a shaft, rod, bolt
etc. into the spark plug hole and run the piston against it from both sides
and mark TDC as the average.  This is suppose to be looking for a very
accurate value, like less than a degree error.  Looking at valve won't do
that, and you don't know that the cam is ground perfectly.

 

The pneumatic approach appears to be something you do when it is not easy to
put the piston stop in the plug hole, or if you are not comfortable with
running the piston up against a stop.

 

Ken

--- On Sat, 11/27/10, michael frazier <red3644 at hotmail.com> wrote:


From: michael frazier <red3644 at hotmail.com>
Subject: Re: [DeTomaso] pneumatic kit to find TDC
To: "Will Kooiman" <wkooiman at earthlink.net>, rob at dumoulins.net,
fresnofinches at aol.com
Cc: "pantera list" <detomaso at realbig.com>
Date: Saturday, November 27, 2010, 4:01 PM


Exactly Will,
   That thing should be in the same catalog as muffler bearings & cans of
muzzle blast.

Michael Frazier
Gruppo Rompiculi Corsa 

> It looks like a whole lot of gadget for a simple enough task.
> 
> You can remove a valve cover and watch the valves. The compression stroke
> is TDC right after the intake valve closes.
> 
> If you don't want to remove a valve cover, remove the #1 plug, and cover
the
> hole with your finger. Don't stick your finger all the way in the spark
> plug hole. Just cover the hole. When the piston comes up on the compress
> stroke, it will blow your finger off.
> 
> You can use a screw driver to find TDC. The screw driver will stop getting
> pushed out the hole as the piston comes up.
> 
> I have also used a spark-plug-TDC-locator. It is essentially a piston stop
> that screws into a spark plug hole. You turn it over by hand until it
> stops, mark the balancer, turn it over in the opposite direction, mark the
> balancer, halfway between the 2 marks is TDC.
> 
> -----Original Message-----
> From: detomaso-bounces at realbig.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso-bounces@realbig.com>
[mailto:detomaso-bounces at realbig.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso-bounces@realbig.com>
] On
> Behalf Of Rob Dumoulin
> Sent: Saturday, November 27, 2010 7:03 AM
> To: Larry Finch
> Cc: detomaso at realbig.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso@realbig.com> 
> Subject: Re: [DeTomaso] pneumatic kit to find TDC
> 
> Sometimes the simplest solutions are the best. This one also would only
> show you TDC on the compression stroke, which is when you want to line up
> the distributor too.
> 
> 
> On Sat, Nov 27, 2010 at 1:12 AM, Larry Finch <fresnofinches at aol.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=fresnofinches@aol.com> >
wrote:
> 
> >
> >
> >
> > right here...
> >
> > http://www.jhmbuttco.com/acatalog/info_AST5005.html
> >
> > Larry
> >
> >
> >
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> 
> -- 
> Rob DuMoulin
> 904.476.8744
> rob at dumoulins.net
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