[AJD] GP valve guide problems

[Dee Schuyler]

John
As no one else has responded , let me put in my two cents worth. The fellas 
that have dealt with this I would imagine
are the Ostranders , Paul & Michael but I bet they are very busy with the 
Show Schedule.
With my GP I was fortunate in that the engine was fine in the compression & 
valve dept,
Now when you have a problem  with the finals and brakes
I may be able to help more! That said, I do not quite understand your 
machine shops  inability to get the block under the milling machine? I have 
a old Bridgeport J head
and I will bet the block would have plenty of room? Unless I am clear out in 
left field?
First thing I would check is where is the slop? Again most of my experience 
is with D tractors , but D valves are notorious
for the stem to be worn bad. But if it is indeed just guide wear I would 
think most any competent shop could press them out, and if new ones are not 
available , they are a simple lathe & mill project.
You might be ahead to get a second shop opinion?
Dee
----- Original Message ----- 
From: "John Boehm" <rustyacres at yahoo.com>
To: "Antique John Deere" <antique-johndeere at lists.antique-tractor.com>
Sent: Wednesday, July 13, 2005 7:34 AM
Subject: [AJD] GP valve guide problems


> My first "restoration" 25 years ago was a GPO, #15008.
> A lot of things were not done correctly, both
> cosmetically and mechanically. I am now redoing it and
> trying to do things  right.
>
> One of my problems is very worn valve guides that are
> allowing a lot of carbon buildup. I need to either
> replace or rebush the guides. I see that new guides
> are not available from Deere. Are they available
> anywhere else? If I were able to find new guides,  how
> would I proceed to remove the old ones?
>
> My current thought is to take the block to our local
> machine shop to have them put bushings in the existing
> guides, then machine them to fit the valve stems. Any
> opinions on this approach? The machine shop was not
> sure if they could get the block properly in place on
> their equipment to align and bore the guides. Any
> opinions appreciated!
>
> John Boehm
> Woodland, CA
> Visit my web site at http://vintagetractors.com
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