Robert, Thanks for the reply.
The opening for the plug in the rocker shaft is .258 and the plugs are .30.
The plugs appear to be made of a malleable metal that is intended to distort
upon installation. I believe my original problem was attempting to install
with a flat punch as the driver. The flat punch cause the bottom of the plug
to break due to the flat surface and overall size of the punch. These plugs
actually elongate as they are forced into the opening reducing in diameter
by compression. Another example of strange engineering from the Isles!
Moss suggested I use a rounded Oak dowel on the second attempt. Received the
replacement plugs today and will try again this weekend.
The lip on the crank shaft that is causing grief is located adjacent to the
flat surface the lower timing gear rests against. The shims distort due to
an inability to seat flat against this face. I will need to remove this in
order to get an accurate alignment of the two timing gears. The lip should
be easily removed I just wanted to know if anyone else had experienced this
problem. I did not encounter the problem you described regarding the
increased gasket thickness. I had the crank checked and polished with the
machine shop reporting that all was within spec.
Thanks for the advice.
Dick Y
74 TR-6
----- Original Message -----
From: "Robert M. Lang" <lang@isis.mit.edu>
To: "R Yahne" <yahs@povn.com>
Cc: <6pack@autox.team.net>
Sent: Tuesday, January 22, 2002 8:24 AM
Subject: Re: Rocker Shaft Oil Plugs & Front Crank shims.
> On Sat, 19 Jan 2002, R Yahne wrote:
>
> > Two questions for the members. I need help on directions installing the
oil
> > plugs in the rocker shaft. The replacements for Moss appear oversized.
> > Attempts to install these resulted in the bottom breaking out of the new
> > plugs. Anyone have any experience with these they can share?
>
> Can't help you there. Did you try heating the rocker shaft in an onen and
> also freezing the plugs? Knowing the measurement of each piece would help
> figure out how to fix things. Assuming an "interference fit", the plugs
> should be about .002 _smaller_ than the hole in the shaft. If not, then
> you'll need to produce some "magic" to get them puppies in there.
>
> :-0
>
> > My second question is about the shims that fit behind the lower timing
chain
> > gear allowing alignment with the driven cam gear on the front of the
block.
> > The originals were distorted due to a small lip on the crank. The
replacements
> > do not fit over this lip and will also become distorted if I attempt to
> > install without some modification. Should I attempt to remove the lip on
the
> > crank or enlarge the opening of the shims?
>
> The crank end is "bell-mouthed"?
>
> I'd get another crank, if I were you. Have you had this crank crack
> tested. If the crank has taken enough of a shot to distort the end of the
> crank, I'd question the integrity of the piece.
>
> That having been said, have you tried "dressing" the end of the crank with
> a file to help the parts fit better? Does the crank "snout" run true?
>
> I only mention all this because I've made an interesting observation on
> the last two engine jobs that I've done... the new lower gasket kits that
> I've purchased (labelled "conversion set, 2000, 2.5L) has a really thick
> gasket for the front engine plate. By really thick, I'm talking over .030
> inches. The original was more like .015. The problem with the thicker
> gasket is that you need a pile of the .004 adjusting shims to get the
> lower sprocket on the same plane as the camshaft sprocket... like 6 or 8
> of them.
>
> This was never a problem not that long ago. So far the suppliers seem to
> be unaware of the issue this causes, but I dare you to try to get the .006
> shims anymore (at least from TRF or Moss).
>
> Just thought I'd throw that out there for discussion...
>
> > Thanks
> >
> > Dick Y.
> > 74 TR6
>
> Later,
> rml
> --------------------------------------------------------------------------
----
> Bob Lang Room N42-140Q | This space for rent
> Consultant MIT unix-vms-help |
> Voice:617-253-7438 FAX: 617-258-9535 |
> --------------------------------------------------------------------------
----
|