Date: Fri, 13 Jul 2007 23:38:32 -0400
Reply-To: David Milo <dellaone@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Milo <dellaone@GMAIL.COM>
Subject: Fwd: exaust removal woes
In-Reply-To: <73bad2170707131955k4e584742g5cbde193f0b95b53@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
---------- Forwarded message ----------
From: David Milo <dellaone@gmail.com>
Date: Jul 13, 2007 10:55 PM
Subject: Re: exaust removal woes
To: dylan friedman <insyncro@yahoo.com>
Yeah Craig,
I have to agree with Dylan. This will be a horrible job with the engine in
place. Much easier to do with it out on the floor (or better yet on a
bench).
If worse comes to worst, you are looking at a new head. I would study the
Bentley manual very closely to see what is involved. Seals, torque sequence
and procedures (keeping the sleeves in place while pulling the head are very
important). Replacing the head is not hard, but requires you to pay close
attention to the steps involved, none of which are easily skipped without
paying a price in the long run. For instance, if the head must come off, you
should replace the cylinder hold down studs before installing the new head,
due to stretch and fatigue over the years. Ask me how I know :(
If you get a new AMC head, the valves should be replaced with german valves
due to poor quality of the spanish valves. A replacement head from GoWesty
would be a way to do this, they replace the valves before shipping, I think,
please ask them.
I'm very sorry you are having these difficulties, and hope your mechs can
bail you out using your existing head.
All of this is why I went Subie, but I know funds are tight.
BTW, nice pictures of your pancake breakfast!
Dave
On 7/13/07, dylan friedman <insyncro@yahoo.com> wrote:
>
> to do it the right way and have it work when you are finished, the head
> should come off and use a drill press and good bits to make a hole for an
> extractor. I have had similar issues in the past. I don't mess with it in
> the van. I pull them and do it so it will last and not make matters worse.
>
> dylan
>
> craig cowan <phishman068@GMAIL.COM> wrote: So today my day at work started
> as any would (except discovering the trash
> truck put a sizeable dent in the nose of the vanagon......which will be
> repaired free of charge), and the mecahnics at my work started working on
> my
> vanagon. I popped in from time to time to check the progress. The goal was
> to replace the manifold gasket at cylinder 1, so the manifold had to come
> off as the studs were damaged. Of the 4 bolts that connected to the heads
> and 2 that connected to the collection pipe (1.9L) The collection pipe
> bolts
> came right off, and 3 of the head nuts. One was not so lucky. It snapped
> and
> the mechanic welded a nut to the stud and started backing it out.....it
> was
> working really well....till it broke the stud halfway inside the head.
> So......out comes the tungsten carbide drill bits.......a very accurate
> and
> perfectly executed drilling went horribly wrong when the bit broke off
> flush
> with the head. "You cant drill out a drill bit" boss mechanic said.....so
> over the course of the weekend the entire staff is trying to figure out
> how
> to fix this without removing the head (or even if the head comes
> off.....what do you do?)
>
> Sudgestions so far include "Burn it out" though i dont know how, "Stronger
> Drill Bits" which are on order but have low expectations, and "replace the
>
> head".
>
> Any ideas are greatly appreciated!!!!!!
>
> -Craig
> '85GL (which isnt having its best day)
>
| 
