[T3] valve guides

[Keith Park]

Sounds like im probably best off having the machine shop do them as I have
in the past, the air hammer idea is a great one though, aren't they handy!
I have to go over there anyway to pick up some of the Joe Gibb oil, turns
out they are my local distributor of it!

Thanks

Keith


Top Notch Restorations
topnotch at nycap.rr.com 
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback "Hothe"
65 Notchback "El Baja Rojo"
65 Squareback "Eggcrate"
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93 RX7 "Redstur"


-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Friday, September 28, 2012 11:07 PM
To: type3 at vwtype3.org
Subject: Re: [T3] valve guides

On 28 Sep 2012 at 20:58, Keith Park wrote:

> Ok, this sounds like a good idea.  How do I drive them back in without
> mushrooming them?

The best thing to do is to warm up the head, lube the bore and the 
guide, and drive the new guide in quickly with a piloted drift. 
Again, I use an air hammer to do this. Get it started straight or the 
guide will bend, but imperceptably so. A bent guide shows up as 
feeling "different" when you try to ream it.

> I plan on replacing the valves themselves, will I have any problems with
> them lining up correctly when I lap them in or will I have to have the
seats
> ground to the new guides??

I've always gotten the seats touched up after doing this, but you 
could try just lapping them and see how they line up. You should 
usually ream the 8 mm bore first, just to make sure it has the 
correct dia.

It's worthwhile making friends with a local machine shop. They 
actually know what they're doing and will generally do a good job if 
they know you and you manage to stay on the right side of them. I've 
got a good crew here, and they've got a terrific valve & head setup.


-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

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