At 04:56 AM 11/17/2010  +0000, brett rueff wrote:
>Im re-assembling my exhaust system.  I have a 2.2L subaru engine
>with custom exhaust header, but I am stock vanagon from the J pipe
>downstream on a 91 Vanagon.
>
>My bently shows 5 special washers where the J pipe joins the
>header.  The PO did not have those in there.  My exhaust header was
>quite badly cracked.  Now that I am putting it back together i'd
>like to include them - I assume they are there for a reason.  Can
>anyone give me a part number or better yet a size/description and I
>can get them from fastenall.

Brett, ETKA shows that joint with an M8x65 bolt and two washers -- a
flat washer A8.4x15x4 (thick washer!) p/n 900 955 01 and a Belleville
spring washer (aka concave spring washer, diaphragm spring washer)
that they don't give specs for, p/n 025 251 200.  This is followed by
a *self-locking* M8 nut, p/n 311 101 463.  Without a sample or specs
there's no way to locally source the spring washer.

Unlike 26.9, it also shows every joint forward of that point with a
flat washer A8.4x16x1.6 p/n 011 525 20 and the same Belleville
spring, and the four M8x30 bolts holding the two cylinder pipes to
the collector also use self-locking nuts p/n 022 416 4.  Note that
these nuts are described as "VM8" -- I don't know the significance.

It's certainly possible to stack Belleville springs as shown on 26.9;
however a) I  seriously think it unlikely that Bentley is correct
here given that ETKA shows only a single spring and b) if there *are*
five they could be stacked ///// or /\/\/ or //\\/ or //\\\ or  \\//\
or \\///.   Belleville Spring have a web page describing all that
stuff if you're interested.

Also ETKA shows the thick washer to be below the spring, not above it.

They can't both be right -- beyond that you'll need to hear from
someone who actually knows what VWAG had in mind.  I have the same
questions for my own exhaust system.

Yours,
David