Author Topic: 1955 A7SS - Timing Side Gasket  (Read 1490 times)

Offline paulmbsa

  • A's Best Friend
  • ***
  • Join Date: Jan 2013
  • Posts: 40
  • Karma: 0
Re: 1955 A7SS - Timing Side Gasket
« Reply #15 on: 24.05. 2017 22:05 »
Have you fitted a Anti wet sumping valve?

Offline Terryb

  • A's Best Friend
  • ***
  • Join Date: Feb 2014
  • Posts: 86
  • Karma: 0
Re: 1955 A7SS - Timing Side Gasket
« Reply #16 on: 25.05. 2017 09:10 »
OK, I've primed the sump, started her up - no joy, walked the bike in gear with the plugs out 200+ yards, only result is that I'm knackered.

So, I've removed the timing cover and checked that the pump is rotating and I will have a go at priming the return side as described or go for the overfill option. Thanks for the tips.

Offline Terryb

  • A's Best Friend
  • ***
  • Join Date: Feb 2014
  • Posts: 86
  • Karma: 0
Re: 1955 A7SS - Timing Side Gasket
« Reply #17 on: 25.05. 2017 20:35 »
Hi Paul, yes its has an anti wet sumping valve and I've tried it with and without.

Online chaterlea25

  • Wise & Enlightened
  • *
  • Join Date: Jun 2009
  • Posts: 3181
  • Karma: 45
Re: 1955 A7SS - Timing Side Gasket
« Reply #18 on: 25.05. 2017 21:48 »
Hi,
I would suggest removing the pressure relief valve, then see if oil flows out when the engine is turned over
Anti sumping valves are the source of all evil  *problem* *problem*
If the feed side off the pump is working ok then I would remove the sump plate and use a pressure oil can to inject oil into the pickup pipe
If you can enlist a helper, remove the return pipe at the rear of the crankcase and turn the engine over while injecting oil into the pickup
oil should come out the return connection
Use the oil can to check that the return pipe to the tank is clear
It is not unknown for the pipes to collapse internally
It has happened that the pump gears have failed internally

John
1961 Super Rocket
1963 RGS (ongoing)

Offline duTch

  • Ricketty Rocketty Golden Flashback
  • Wise & Enlightened
  • *
  • Join Date: Oct 2011
  • Posts: 4540
  • Karma: 41
Re: 1955 A7SS - Timing Side Gasket
« Reply #19 on: 25.05. 2017 22:13 »

 In case I missed it, and in addition to all else,  I think someone recently had an issue with the factory fitted  anti-syphon valve sticking shut
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online edboy

  • Valued Contributor
  • ****
  • Join Date: Oct 2012
  • Posts: 429
  • Karma: 3
Re: 1955 A7SS - Timing Side Gasket
« Reply #20 on: 25.05. 2017 22:26 »
another offender is the magnetic drain valve in the sump holding the ball bearing closed. do you have an aftermarket sump plate?

Offline Terryb

  • A's Best Friend
  • ***
  • Join Date: Feb 2014
  • Posts: 86
  • Karma: 0
Re: 1955 A7SS - Timing Side Gasket
« Reply #21 on: 27.05. 2017 20:05 »
OK Guy's it was the Anti Wet Sumping valve that was causing all the problem. I've had this valve installed since 2013 and it's given no trouble until now. The bike has been laid up since Christmas and for what ever reason it's decided to pack up. It will be interesting to see how incontinent she really is, as I installed the AWSV when I purchased her. Thanks for all the advice and the over night overfill worked a treat. Thanks.

Offline duTch

  • Ricketty Rocketty Golden Flashback
  • Wise & Enlightened
  • *
  • Join Date: Oct 2011
  • Posts: 4540
  • Karma: 41
Re: 1955 A7SS - Timing Side Gasket
« Reply #22 on: 28.05. 2017 10:57 »

  *whistle* *whistle* *whi.... *shh*
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline coater87

  • Wise & Enlightened
  • *
  • Join Date: Jul 2008
  • Posts: 1181
  • Karma: 6
Re: 1955 A7SS - Timing Side Gasket
« Reply #23 on: 28.05. 2017 14:58 »
 Way to hold in the potty mouth Dutch *ex*
Central Wisconsin in the U.S.

Online chaterlea25

  • Wise & Enlightened
  • *
  • Join Date: Jun 2009
  • Posts: 3181
  • Karma: 45
Re: 1955 A7SS - Timing Side Gasket
« Reply #24 on: 28.05. 2017 15:35 »
Hi,
Quote
Anti sumping valves are the source of all evil  *problem* *problem*

Its good that  you sourced the problem and did not wreck the engine
John
1961 Super Rocket
1963 RGS (ongoing)

Offline Topdad

  • bob hebdon
  • Wise & Enlightened
  • *
  • Join Date: May 2011
  • Posts: 2228
  • Karma: 32
  • l
Re: 1955 A7SS - Timing Side Gasket
« Reply #25 on: 30.05. 2017 13:47 »
Bet the ball is stuck fast to it's seat !
" rules are made for the guidance of wise men and the blind obediance of fools"
United Kingdom

Offline Terryb

  • A's Best Friend
  • ***
  • Join Date: Feb 2014
  • Posts: 86
  • Karma: 0
Re: 1955 A7SS - Timing Side Gasket
« Reply #26 on: 31.05. 2017 19:00 »
No the ball is not stuck, the ball and spring works OK using an air line. It's strange, the oil dose flow from the return pipe but it 's intermittent, so I've trashed it. I'm still checking to see how bad the wet sumping is.

Offline bsa-bill

  • Wise & Enlightened
  • *
  • Join Date: Mar 2006
  • Posts: 5415
  • Karma: 61
Re: 1955 A7SS - Timing Side Gasket
« Reply #27 on: 31.05. 2017 19:10 »
Quote
the oil dose flow from the return pipe but it 's intermittent,

the return side of the pump has greater output than the feed side, so there is less oil being fed into the engine than the pump could pump out hence an intermittent flow as it gasps air in the absence of enough oil being available
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline bikerboy

  • Valued Contributor
  • ****
  • Join Date: Dec 2011
  • Posts: 336
  • Karma: 4
Re: 1955 A7SS - Timing Side Gasket
« Reply #28 on: 14.06. 2017 02:02 »
I know some people are totally anti wet sumping valves but they do have uses.

I rebuilt my SR and despite replacing the ball and spring etc it wet sumped.

I changed the oil pump and it wet sumped

I stripped it down again and fitted yet another ball bearing reseating it yet again and guess what.................yep it wet sumped

At that point I gave up and fitted an anti wet sumping valve and its been fine since

Offline Slippery Sam

  • A's Best Friend
  • ***
  • Join Date: Aug 2016
  • Posts: 120
  • Karma: 1
Re: 1955 A7SS - Timing Side Gasket
« Reply #29 on: 14.06. 2017 08:22 »
Bikerboy,
How bad is your wet sumping.
I'm new to the game and was a bit paranoid of this evil - but have read loads and loads on the subject and strangely I feel a lot more relaxed about it.
How much oil do you get and in what sort of time period?
A quick sump drain before a ride isn't too bad a compromise.
The guys on here will keep you right and will be able to advise what is acceptable (normal) and not - remember there should be oil in the sump - and if none after a rebuild or whatever you need to prime by adding oil to the sump (as you did in the above thread) - so a dry sump is probably worse than a wet one!

cheers Raymond.
BSA A10 Cafe Racer project
Scotland