Author Topic: Cam Shaft Shims ?  (Read 1313 times)

Offline Josh Cox

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Cam Shaft Shims ?
« on: 08.08. 2009 07:45 »
Hi,

Bolted my cases together today with the CAM (334) inplace, with the drive gear bolted on there was around .55mm / .024 " end play, where does one shim this out ?.

Which bush do you shim ?.
Black 1953 Golden Flash Plunger

Offline shabashow

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Re: Cam Shaft Shims ?
« Reply #1 on: 08.08. 2009 21:49 »
Josh,
Don't shim any bushes.
The cork washer on the breather inside the timeing case should be the correct thickness to take up the endfloat. When I got my last complete gasket set, there were corks of three different thicknesses supplied, so you could use the appropriate one - not too thick, not too thin. Give it a good soak in oil overnight to allow for any swelling.
The way I did it was to get the cam and pinion in place and try the different corks, taking up the endplay but not using a cork so thick that you can't turn the camshaft by hand. When happy, replace the idler gear, time the engine and reassemble the inner timing case.
John

Offline Josh Cox

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Online muskrat

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Re: Cam Shaft Shims ?
« Reply #3 on: 09.08. 2009 13:58 »
G'day Josh,
               John is right about the corks, but if you feel it needs to be shimmed they would have to go behind the bush. Eg warm the case in oven to 150 C push bush out, place required shim over bush behind the flange and replace bush. Any shim placed between cam and bush will wear very quickly.
Cheers
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Offline Josh Cox

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Re: Cam Shaft Shims ?
« Reply #4 on: 09.08. 2009 15:40 »
G'day,

Am in agreement about the cork washer holding a "pretension" on the cam, i.e. no actual end play, I am interested to know where Haynes pulled the .004 figure from ?.
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Offline A10Boy

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Re: Cam Shaft Shims ?
« Reply #5 on: 09.08. 2009 22:41 »
There are several mistakes in the haynes manual, they just make it up as they go along.

Ignore that one, as has been said the cork washer is where the play is taken up.
Regards

Andy

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