Author Topic: Cam gear cork  (Read 421 times)

Offline Nicolasticity

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Cam gear cork
« on: 25.03. 2024 11:20 »
Cork damping? glued to back of the camgear is in fair condition with a small bit of material loss.  I wonder if new cork is less dense and therefore not as good as a fair cork from 1961 A10SR.

Is the cork in picture good?
61 SR

Offline CheeserBeezer

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Re: Cam gear cork
« Reply #1 on: 25.03. 2024 13:28 »
If the engine has been disturbed and the cork has gone hard you'll need to replace it. The thickness of the cork is quite critical as it is used to remove endfloat from the camshaft. It shouldn't have too much pressure applied to it or the top-hat breather will wear the inner timing cover. A different camshaft and the thickness of gaskets you're using will affect the endfloat, amongst other things.

Offline Nicolasticity

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Re: Cam gear cork
« Reply #2 on: 26.03. 2024 08:31 »
Do you know…. Sometimes you wake up and well lets leave it there….

Now I understand - cork is on outside *smile* - fit gear, fit the 0134 cork (no glue), fit cover and check for any float. If tight then remove cover and check for 10 to 20 thou crushing, ideally about 10.

I have several corks in the gasket set to get it right!

Many thanks for the path!
61 SR

Offline muskrat

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Re: Cam gear cork
« Reply #3 on: 26.03. 2024 09:45 »
G'day Nic.
Replace it.
I like to give the corks 5 to 10 thou crush between the cork and inner cover. I have in the past placed a gasket behind the cork to give it more crush but beware too much crush will wear the inner cover.
CheeserBeezer has the in a 4 pack.
Breather cork set,  4 corks
PMG018
67-0134/5/6/7
67-0158/9/60
5.00
Cheers

'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7

Online limeyrob

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Re: Cam gear cork
« Reply #4 on: 15.04. 2024 10:56 »
Set this yesterday so its fresh in my mind.  The different cork thickness vary quite a lot so its hard to get a correct fit. mine came with a lot of old corks (?) and they had all been very heavily compressed and the inner case was quite worn so I think someone was setting it with too much force.  I've fitted a better case and set it to just touch with no float and little or no pressure.  Will see how that goes.
Slough 59 GF/SR