924Board.org

924guy · Posted: Sat May 09, 2009 10:26 pm Post subject:

i think im going to frame one of these and hang it on my living room wall....

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Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha

Scorpio · Posted: Sat May 09, 2009 10:48 pm Post subject:

RC · Joined: 25 Mar 2007 Posts: 2636 Location: Australia

Good news:

They fit.

Bad news:

Not quite.
Although these are headers, don`t think the stock manifolds are any smaller. This shows the front riveted piece, the rear one also interferes. Suggest checking that your manifold does not hang any lower than the head face, and fixing it BEFORE you install it.

Also on the intake side the front rivet also fouls. Ground a mm or 2 off the manifold in this spot. If your head has not been machined much you may not have any issues.

Good news is:

They Work!

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11723 Location: PacNW

Ugh.

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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

RC · Joined: 25 Mar 2007 Posts: 2636 Location: Australia

yea..........

Realized that after the head was torqued down so knocked the tabs down with a bit of flat bar and hammer. Not ideal.

Discussed this with Peterld earlier and they do interfere on a stock 931 manifold. The tabs and rivets hold the layers together and more importantly in alignment. Should be able to get away with carefully cutting off the 2 on exhaust side. Easy on an engine stand but a PITA to do in the car.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11723 Location: PacNW

We need some feedback from Cometic on this. I am very surprised this was never considered during development.

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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

tuurbo · Posted: Tue May 26, 2009 4:40 am Post subject:

I don't get it. I'm looking at a stock head gasket 931 104 337 06 and there are no tabs with rivets.

Why would the company include those tabs?
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1980 924 turbo, MSD, Meth. Inj, otherwise stock.

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

It is a multi-layer steel gasket. So it is made up of multiple layers of steel which are riveted together to provide alignment of the layers.

I've test fitted my engine together, but I didn't notice this issue with my header. The header interfered with the starter heat shield. I'll go out to the garage and take a peak to see if perhaps I missed it.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

tuurbo · Posted: Tue May 26, 2009 5:28 am Post subject:

Gotcha. Thanks. So if you cut one of these tabs off the alignment of the layers can go 'off'.
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1980 924 turbo, MSD, Meth. Inj, otherwise stock.

Shurick · Joined: 15 May 2005 Posts: 524 Location: Russia, Moscow.

If I'm guessing right, those MLS gaskets are disposable. And tabs with rivets are only to hold the layers together till your gasket is tighten up. Once it is in place, you can cut the tabs and it will not affect the sealing or anythyng else.
Although it's an issue that must be solved, it's not a big mess.
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WBR, Shurick
'79 931 -- intercooled K26-3060-6.10 turbo @ 1.2 bar, EFI+EDIS, 951S brakes, stripped interior, 951 look.
'86 924S -- R.I.P.
https://www.instagram.com/ru_pacecar/

ideola · Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI

I'll contact Cometic tomorrow and ask for a recommendation. And for the record, the gaskets are NOT reusable, according to my source at Cometic.
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erstwhile owner of just about every 924 variant ever made

Shurick · Joined: 15 May 2005 Posts: 524 Location: Russia, Moscow.

Scorpio · Posted: Tue May 26, 2009 8:23 am Post subject:

!tom · Posted: Tue May 26, 2009 8:37 am Post subject:

peterld · Posted: Tue May 26, 2009 8:40 am Post subject:

Guys, its no big deal. Once the head is torqued down, it is a simple matter to bend the rivet ear out of the way. At worst it could be cut off as the head gasket is in place and secured.