Author Topic: is my HEAD still good and functional???  (Read 5172 times)

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Offline crazypj

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Re: is my HEAD still good and functional???
« Reply #25 on: August 13, 2012, 09:40:15 AM »
I would use a scalpel and trim hole so 'O' ring is centered.
The ring will distort and you'll get an oil leak within a few hundred miles (it will still weep after a few thousand, they all do unless you dowel the hole so 'O' ring is supported, see ffJMoore 550 build)
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Offline RAFster122s

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Re: is my HEAD still good and functional???
« Reply #26 on: August 13, 2012, 10:42:21 AM »
You need to use some chemicals & remove all traces or the old gasket or you are asking for trouble. Correct side up on headgasket? If so, yes trim the holes so the orings are centered.
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Offline goldarrow

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is my HEAD still good and functional???
« Reply #27 on: August 13, 2012, 10:50:45 AM »
Thanks crazypj and rafster.  I'm mocking up the assembly right now and havent tighten anything yet. Just want to get an idea of what and how things go back on

Also another question, the two oil dowels/nozzles. Which end is up or down? One end is round that looks like it will go into bottom case, and that's what I did.   just want to make sure.  But a pic that was in ffjmoore engine build threat shows to the contrary.

I stole this pic from ffjmoore, oil dowel round ends looks like it's on pointed up.
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Offline dave500

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Re: is my HEAD still good and functional???
« Reply #28 on: August 13, 2012, 12:49:55 PM »
your oil dowel/restrictor is the correct way up,make sure its clean underneath,youll see how its design invites the trapping of material blow it out and make sure you can see through the pin hole.

Offline goldarrow

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is my HEAD still good and functional???
« Reply #29 on: August 13, 2012, 03:05:08 PM »
You need to use some chemicals & remove all traces or the old gasket or you are asking for trouble. Correct side up on headgasket? If so, yes trim the holes so the orings are centered.

Cleaned up some more old gaskets, filed down the holes so o-rings fit better now. But which way gasket is face up? The way I have in pics are good?
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0