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#355694 - 01/30/11 9:51 pm Sealing inner timing cover A-65  
Joined: Aug 2001
Posts: 3,348
BONZO R.I.P. Offline
In Remembrance
BONZO R.I.P.  Offline
In Remembrance

Joined: Aug 2001
Posts: 3,348
Michigan, USA
I finally got 'round to ordering gaskets/seals for the A-65 inner timing cover to get after the leak to end all leaks and thought "I'd inquire about any tips in this area .I tracked the leak to my own stoopidity , the two lower screws were just a wee bit too long and seated fully before they did their job .I "thought" they were the same screws I had in there before but ??Anyway , I am back at it and was wondering if there were any tips I should look at while in there . I am well versed in the shift quadrant and kick spring,just looking for sealing tips .

Thanks-BONZO

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#355704 - 01/30/11 10:33 pm Re: Sealing inner timing cover A-65 [Re: BONZO R.I.P.]  
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Richard Phillips Offline
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Richard Phillips  Offline
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Posts: 792
San Luis Obispo, CA
Hey Bonz,
For me I make sure all the old gaskets and sealer is removed for both cover and cases If you can, check the cover for flatness and you can lap it flat if its warped however most I have found have been ok. Also I think the locating dowels are pressed into the cover, not the cases ( not sure of this )
I use a permatex non harding sealer on the case side and I attache the gasket. I use a smear of bearing grease on the cover side of the gasket, so if I got something the cover can be removed without the gasket. Tighten from the center out, do it twice.
I like non harding sealer because sometimes you need to tighten up the screws a bit later if you get a small weep and the sealer sorta oozes into the zone.
I also like a tiny bit of thread sealer on the tips of the screws.
Be care full with the seals not to tear the lip especially on the pinion ( they make a tool to insert in the pinion that is tapered this protects the seal.


Good luck,
Richard

#355707 - 01/30/11 10:47 pm Re: Sealing inner timing cover A-65 [Re: BONZO R.I.P.]  
Joined: Oct 2001
Posts: 529
Ola Offline
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Ola  Offline
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Posts: 529
Norway
I have machined grooves and put o-rings on the kick- and gear shafts through the inner cover, I had small leakages there. I never use gasket, just Locktite 5910 on both surfaces, perfect seal.

Best regards


There are no bosses in a technical discussion
(Doug Hele, 1919 - 2001)
#355730 - 01/30/11 11:49 pm Re: Sealing inner timing cover A-65 [Re: BONZO R.I.P.]  
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Rickman Offline
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Rickman  Offline
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Ohio
Bonzo,
If you are using the paper gaskets, if you don't use a non-hardening sealer, or even if the paper gasket has shrunk, soak the gasket in hot water for a few minutes.
Brett

#355824 - 01/31/11 3:13 pm Re: Sealing inner timing cover A-65 [Re: Ola]  
Joined: Jul 2001
Posts: 12,050
Lannis Online content
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Lannis  Online Content

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Posts: 12,050
Central Virginia
Originally Posted By: Ola
I have machined grooves and put o-rings on the kick- and gear shafts through the inner cover, I had small leakages there. I never use gasket, just Locktite 5910 on both surfaces, perfect seal.

Best regards


Same with me ... Locktite 515 anaerobic sealer per the directions on the tin, no paper, no leaks.

Lannis


OK, I admit it, I'm addicted to brake fluid.

But I can stop any time I want.
#355826 - 01/31/11 3:58 pm Re: Sealing inner timing cover A-65 [Re: Lannis]  
Joined: Aug 2001
Posts: 3,348
BONZO R.I.P. Offline
In Remembrance
BONZO R.I.P.  Offline
In Remembrance

Joined: Aug 2001
Posts: 3,348
Michigan, USA
Thanks for the responses guys ,I did use the gasket since I had already ordered a few .I'll keep the O ring tip in mind if I ever get this thing so oil tight that I notice some weeping in that area . It is all buttoned up and ready to go back in the frame when I get a break in the weather ,hoping the job's a goodun'.

thanks again-BONZO

#372879 - 05/12/11 11:59 am Re: Sealing inner timing cover A-65 [Re: BONZO R.I.P.]  
Joined: Apr 2007
Posts: 720
BrizzoBrit Offline
Life member
BrizzoBrit  Offline

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Joined: Apr 2007
Posts: 720
Brisbane, Australia
OLA,

Any tips on doing the o-ring thing on the shafts. Got a gearbox dismantle coming up and considered doing this as I have some weeping from the drain hole at the bottom of this cover.

O-ring size, slot width/depth?

Cheers
Ray


BSA 1969 A65F
BSA 1966 A65H
Triumph 1968 T120
Kawasaki A1R
& too many projects!
#372880 - 05/12/11 12:53 pm Re: Sealing inner timing cover A-65 [Re: BONZO R.I.P.]  
Joined: Sep 2002
Posts: 7,811
Alex Online content
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Alex  Online Content

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Joined: Sep 2002
Posts: 7,811
Seattle
The seal is designed to run a gasket. If you eliminate the gasket, you run the risk of eliminating the thrust clearance for the idler/timing gear.

It's not hard to get this to seal up. Make sure the mating surfaces are flat and clean and simple smear of grease seems to be sufficient on the gasket to swell it and seal things up.


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