----------
> From: Mark A. Erickson <mlazye@northvalley.com>
> To: Schloss3@aol.com
> Subject: Re: Plugging Cracks
> Date: Sunday, October 05, 1997 9:03 PM
>
> Paul,
>
> Sent a reply awhile back, but I don't think it went through. so here it
is
> again.
>
> Any machine shop that does heads can plug one. A head shop would be
better.
> Plugging is where the crack is drilled out (from end to end) and a plug
> (tapered I think) is installed. This stops the crack and seals the head.
> Cracks between the valves take one maybe two to repair. I have had to
have
> 5 or 6 plugs installed to repair a crack between #2 and #3 (BIG CRACK).
> This area between 2 & 3 between the water holes is of little importance,
it
> can (in reality) be removed. To ease your mind have it fixed. Any crack
> between the valves MUST be repaired, this is the area that takes great
> pressure: draws water into the cylinder and worse lets hot gases into the
> water system (another cause for overheating). If you totally remove the
web
> between the holes between #2 & #3 your head will stay cooler!! Hope this
> info helps.
>
> Mark
>
> ----------
> > From: Schloss3@aol.com
> > To: mlazye@northvalley.com
> > Subject: Plugging Cracks
> > Date: Sunday, October 05, 1997 4:21 PM
> >
> > Mark,
> > Read your reply to the fellow who has the problem with the TR3A head.
> > Concerning the crack and your advice to have it plugged. I have a 61
> TR4
> > with a crack between the water jackets between number 2 and 3
cylinders.
> It
> > is just a hairline, found it when removing carbon deposits. What
exactly
> is
> > plugging and can a machine shop do it.
> >
> > Paul
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