Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: (email redacted)


I'm re-building the head in the Miata I originally owned. 219,000 miles and the
exhaust valves looked really ugly (virtually concave rather than flat
surfaces); valve lapping wasn't working but Corky was kind enough to allow me
access to the lathe in his machine shop so I could reface the valves (Thanks,
Corky!). On the bright side, the cylinder bores look beautiful; no ridge at the
top and the hone marks are still visible with no undue wear marks. :-)

My question is this: the shop manual calls for special service tools for
replacing the valve seals. I figure I can use a pair of bent-tip needle-nose
pliers to remove the old valve seals. To install the new seals, however, the
shop manual calls for a special service tool to place the seals 19.3 mm off of
the spring deck. Do these seals just snap into a groove or do they clamp onto
the valve stem? Can I just lightly tap them onto the valve stem until they snap
into place?

Advice from anyone who has done this is appreciated.

Regards,
Barry

This read-only message was archived from a public mail list.
Mail From: "Chad J. Douglas" <(email redacted)>


I was just looking at that yesterday. If you have access to a lathe,
you can make the tool needed to remove the valve guides

-----Original Message-----
From: (email redacted) [mailto:(email redacted)]
Sent: Monday, December 31, 2001 11:09 AM
To: (email redacted)
Subject: Valve seals



I'm re-building the head in the Miata I originally owned. 219,000 miles
and the
exhaust valves looked really ugly (virtually concave rather than flat
surfaces); valve lapping wasn't working but Corky was kind enough to
allow me
access to the lathe in his machine shop so I could reface the valves
(Thanks,
Corky!). On the bright side, the cylinder bores look beautiful; no ridge
at the
top and the hone marks are still visible with no undue wear marks.
:-)

My question is this: the shop manual calls for special service tools for
replacing the valve seals. I figure I can use a pair of bent-tip
needle-nose
pliers to remove the old valve seals. To install the new seals, however,
the
shop manual calls for a special service tool to place the seals 19.3 mm
off of
the spring deck. Do these seals just snap into a groove or do they clamp
onto
the valve stem? Can I just lightly tap them onto the valve stem until
they snap
into place?

Advice from anyone who has done this is appreciated.

Regards,
Barry

This read-only message was archived from a public mail list.
Mail From: (email redacted)

In a message dated 12/31/2001 7:57:40 AM Pacific Standard Time,
(email redacted) writes:


>
> My question is this: the shop manual calls for special service tools for
> replacing the valve seals. I figure I can use a pair of bent-tip
> needle-nose
> pliers to remove the old valve seals. To install the new seals, however,
> the
> shop manual calls for a special service tool to place the seals 19.3 mm off
> of
> the spring deck. Do these seals just snap into a groove or do they clamp
> onto
> the valve stem? Can I just lightly tap them onto the valve stem until they
> snap
> into place?
>

I was able to push them into place (or tap lightly) using a long 10mm socket.
Just check the height to make sure they are fully seated. I don't think
you can push them on too far without using a lot of force. Helps to oil
them.

Sheldon

This read-only message was archived from a public mail list.
Mail From: "Chad J. Douglas" <(email redacted)>


I thought you were talking about the valve guides, not the seals. My
manual has the specs on how to make a tool (with a lathe) to remove the
guides, but I don't know about the seals. I don't have the manual
handy.

Since I realized that I was going to answer your question incorrectly, I
decided not to reply, but I must've hit send instead of close.

The manual I refer to is Rod's ehtusiat's manual.

Also, I'm not sure if there is any difference in the 1.6L or the 1.8L
engines in this regard. My manual is for the 1.8. What size motor is
yours?

Chad

-----Original Message-----
From: (email redacted) [mailto:(email redacted)]
Sent: Monday, December 31, 2001 2:23 PM
To: Chad J. Douglas
Subject: RE: Valve seals


Chad...empty message from ya. Perchance you have info on how to do this?

Barry
---------- Original Text ----------

From: "Chad J. Douglas" <(email redacted)>, on 12/31/2001 11:43 AM:



-----Original Message-----
From: (email redacted) [mailto:(email redacted)]
Sent: Monday, December 31, 2001 11:09 AM
To: (email redacted)
Subject: Valve seals



I'm re-building the head in the Miata I originally owned. 219,000 miles
and the
exhaust valves looked really ugly (virtually concave rather than flat
surfaces); valve lapping wasn't working but Corky was kind enough to
allow me
access to the lathe in his machine shop so I could reface the valves
(Thanks,
Corky!). On the bright side, the cylinder bores look beautiful; no ridge
at the
top and the hone marks are still visible with no undue wear marks.
:-)

My question is this: the shop manual calls for special service tools for
replacing the valve seals. I figure I can use a pair of bent-tip
needle-nose
pliers to remove the old valve seals. To install the new seals, however,
the
shop manual calls for a special service tool to place the seals 19.3 mm
off of
the spring deck. Do these seals just snap into a groove or do they clamp
onto
the valve stem? Can I just lightly tap them onto the valve stem until
they snap
into place?

Advice from anyone who has done this is appreciated.

Regards,
Barry

This read-only message was archived from a public mail list.
Mail From: "Ralph Doehrmann" <(email redacted)>


I tap new seals in with a deep 12 point socket. The right size will rest on
the metal part of the seal and let you tap the seal down till it clicks.
Works very well. I'm looking into building a seal puller. Goodson has a
puller for $130 that is like a big pickup tool. 4 hooked tabs that fit
around the seal and a tube that slides down over them. Slide hammer to pull
up. If you use anything else in the lifter bore you might think about
wrapping tape or something around it so the bore isn't cratched.

For driving in guides the best bet is the correct tool from Goodson. Only
about $8. It is specially machined... Some people do use just a hammer....
THat works too...

Ralph Doehrmann

> My question is this: the shop manual calls for special service tools for
> replacing the valve seals. I figure I can use a pair of bent-tip
> needle-nose
> pliers to remove the old valve seals. To install the new seals, however,
> the

> shop manual calls for a special service tool to place the seals 19.3 mm
> off of
> the spring deck. Do these seals just snap into a groove or do they clamp
> onto
> the valve stem? Can I just lightly tap them onto the valve stem until
> they snap
> into place?
>
> Advice from anyone who has done this is appreciated.
>
> Regards,
> Barry
>

This read-only message was archived from a public mail list.
Mail From: Stan Whitney <(email redacted)>


I was able to simply push them on by hand, they make a
solid pop when they seat on the ridge.

Stan


--- (email redacted) wrote:
>
> I'm re-building the head in the Miata I originally
> owned. 219,000 miles and the
> exhaust valves looked really ugly (virtually
> concave rather than flat
> surfaces); valve lapping wasn't working but Corky
> was kind enough to allow me
> access to the lathe in his machine shop so I could
> reface the valves (Thanks,
> Corky!). On the bright side, the cylinder bores look
> beautiful; no ridge at the
> top and the hone marks are still visible with no
> undue wear marks. :-)
>
> My question is this: the shop manual calls for
> special service tools for
> replacing the valve seals. I figure I can use a pair
> of bent-tip needle-nose
> pliers to remove the old valve seals. To install the
> new seals, however, the
> shop manual calls for a special service tool to
> place the seals 19.3 mm off of
> the spring deck. Do these seals just snap into a
> groove or do they clamp onto
> the valve stem? Can I just lightly tap them onto the
> valve stem until they snap
> into place?
>
> Advice from anyone who has done this is appreciated.
>
> Regards,
> Barry


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