Author Topic: Baffled, confused and covered in oil!!!!!!  (Read 389 times)

Offline Swarfcut

  • Resident Legend
  • *****
  • Join Date: Oct 2018
  • Posts: 642
  • Karma: 8
Re: Baffled, confused and covered in oil!!!!!!
« Reply #15 on: 13.09. 2019 07:45 »
BB...Here's me thinking you know nothing about these motors... turns out you are well experienced and with what looks like a choice when it comes to replacement parts. Apologies if I have stated the obvious, but it is always difficult to know what knowledge, experience and skills the fella with the problem has. Looks as if despite your engine building skill, it has defeated you (and a good few others) for the time being.

 Stick with the KiWi....a re visit of the oil lines and tank is quick and easy.....a good pressure on the return side of the pump would indicate  reasonable pick up and a good pump.



KiWi....Working OK without the pipe is possible on the S/A engine, the oilway is just above sump plate level. The plunger pipe works its way from the sump, hugging the inner crankcase wall, so the oil would need to be up to the main bearing bush, and higher, by which time all the oil is out of the tank and being spread over the road.

 Swarfy.

Offline bikerboy

  • Valued Contributor
  • ****
  • Join Date: Dec 2011
  • Posts: 327
  • Karma: 4
Re: Baffled, confused and covered in oil!!!!!!
« Reply #16 on: 13.09. 2019 22:08 »
Swarfy

No problem got my first A10 (and still got it) back in 1972 when I was 16 and have had so many to bits over the years I have lost count :)

But as you know that does not mean somebody has all the answers nor does it mean that sometimes we overlook the obvious so I am always grateful for advice particularly as some people on this forum make me look like a total newbie with their technical knowledge.

I would still pit myself against anybody at fitting the rocker box tho, I definitely have that down to a fine art and can fit one in minutes :)

Probably because of the amount of times I have messed up a rebuild and needed to have the rocker box on and off 150 times lol

Offline Minto

  • Moving Up
  • **
  • Join Date: Mar 2019
  • Posts: 93
  • Karma: 1
Re: Baffled, confused and covered in oil!!!!!!
« Reply #17 on: 14.09. 2019 02:44 »

“”I would still pit myself against anybody at fitting the rocker box tho, I definitely have that down to a fine art and can fit one in minutes””

If you fancy posting some tips on this subject, or a “how to” video, I would not be offended!!!
52 A10 plunger

Online Gerry

  • A's Best Friend
  • ***
  • Join Date: Nov 2012
  • Posts: 238
  • Karma: 6
Re: Baffled, confused and covered in oil!!!!!!
« Reply #18 on: 14.09. 2019 07:19 »
Hi Minto, If I were to pay your fare to Adelaide Australia plus accomodation and meals due you think you would be able to fit my rocker box on my 59 A10......:-) Cheers Gerry

Offline Minto

  • Moving Up
  • **
  • Join Date: Mar 2019
  • Posts: 93
  • Karma: 1
Re: Baffled, confused and covered in oil!!!!!!
« Reply #19 on: 14.09. 2019 09:15 »
Hey Gerry
That sounds great, I’ll pack my case later. I’ll see if I can talk BikerBoy into coming as well, he can show us both how it’s done. 👍😁
52 A10 plunger

Offline paulmbsa

  • Moving Up
  • **
  • Join Date: Jan 2013
  • Posts: 35
  • Karma: 0
Re: Baffled, confused and covered in oil!!!!!!
« Reply #20 on: 14.09. 2019 14:30 »
I had the same problem turned out to be the pressure release valve makes no sence but changed it and hey presto

Online RDfella

  • Valued Contributor
  • ****
  • Join Date: Aug 2017
  • Posts: 475
  • Karma: 4
Re: Baffled, confused and covered in oil!!!!!!
« Reply #21 on: 14.09. 2019 16:42 »
Of all the different engines I've worked on in the last 55 + years, from lawnmowers to race cars plus marine, I've never come across an engine model with more oil issues (most of which are plain weird) than the A series. The singles use a similar system without problems, so why are the twins less reliable lubrication-wise than the weather? And let's not pretend that isn't the case, as the posts on this forum prove otherwise.
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Offline ironhead

  • A's Best Friend
  • ***
  • Join Date: Feb 2019
  • Posts: 103
  • Karma: 0
Re: Baffled, confused and covered in oil!!!!!!
« Reply #22 on: 14.09. 2019 23:20 »
Of all the different engines I've worked on in the last 55 + years, from lawnmowers to race cars plus marine, I've never come across an engine model with more oil issues (most of which are plain weird) than the A series. The singles use a similar system without problems, so why are the twins less reliable lubrication-wise than the weather? And let's not pretend that isn't the case, as the posts on this forum prove otherwise.

I recon you can point the finger directly at the R/H main bush  with oil trying to be forced through a rotating shaft with a small hole drilled in it. Most other reliable systems have a centre fed crank. Once the crank starts spinning it acts like a centrifugal pump in itself. maybe if BSA had fitted a pump with twice the volume it may have worked properly (eg auto crank & pump style). Other engines with Right hand main bush oil systems suffer as well, one that comes to mind are the AMC singles. ( try finding one without a shot bigend bearing). the difference between these & BSA singles are chalk & cheese, yet they both use roller bearings, in fact at a quick glance the AMC looks beefier.
SA

Offline bikerboy

  • Valued Contributor
  • ****
  • Join Date: Dec 2011
  • Posts: 327
  • Karma: 4
Re: Baffled, confused and covered in oil!!!!!!
« Reply #23 on: 15.09. 2019 13:10 »
Minto

I can give you one tip I sometimes use

Bend the pushrod comb so that it comes down to sit on the top fin of the cylinder head. Use one of those spring steel chassis clips to slide over the fin and the comb holding it nicely in place. Make sure its one of the inlet pushrods that is high so the two exhaust rods are at at the same height.

Loosen the adjuster nuts on the tappets but do not slacken the actually tappets at all. Slip the box on and all those little rods will drop straight into those cups perfectly every time