Wet sumping

[Butch (cb)]

Sorry to jump in here, did wet sumping ever stop on the later models up until the demise of BSA. I had a 1971 Commando for a few years, never had this problem regardless of how long it was laid up in the garage. If I did it must have been minimal. ? Thanks.

No clue how it works on the inside but my Sporty never wet sumps a drop, even over a 6 month or more layup.

[BSA500]

Well all goodwiththe oil filter etc. Pity it sounds like the crank is trying exit through the drive side. I have in and out play in the drive side crank. No shimsinthe bottom. What to stop me going for zero play or maybe 1/2 thou. Every time I go to around 3 thou the gap opens up??????

[muskrat]

G'day BSA500.
Back to square one. Is the wet sumping fixed or at least slowed?
How much endfloat did you have when the bottom end was done up after rebuild? How much now? Is the cush nut done up to 65ft/lb (f'ing tight)
3thou" is acceptable but if you started with 1/2thou and now you have 3 either your maths needs work or the bearing wasn't all the way home when you took the measurement for shimming. Was the t/s bush replaced? It may not have been all the way home either.
But we're getting off the original topic now.
Cheers

[BSA500]

Agree off the original topic I shall repost.  But to answer a few questions.  Yes wet sumping fixed. Cush drive  nut 65ftlb Last took the engine down for bugger small end but didn't recheck the float. Bugger

[muskrat]

G'day all.
My 51 A7 has been a bad wet sumper for a while now. I never measured it but I'd guesstamate 1Lt a week  .
So a few days ago I set about to try and slow it down. First I removed the pump and faced the end plate and extension housing to remove the marks made by the gears to reduce side clearance. I then poked the thin tube attached to a can of carb clean into the crank feed hole (top right) and pushed the ball back. Gave it a good blast moving the ball back and forth. Then wacked it all back together.
Started her up, checked for oil return and rode around the block a few times to get her hot. Dropped the sump plug and let her drain for a few hours. I then put a measuring cup under her and came back 2 days later.
  100ml so now will take 20 days to sump a Lt.
All a bit academic as she's in bad need of a rebuild (timing side bush knackered) and not being ridden much.
Cheers

[BSA500]

Found the reason for the wet sumping. Somebody had left out the plug spring and ball.  *eek*2. Yep me and I have lost them. Where can I buy all the bits I need esp the plug

[Greybeard]

Found the reason for the wet sumping. Somebody had left out the plug spring and ball.  *eek*2. Yep me and I have lost them. Where can I buy all the bits I need esp the plug

I found the spring at SRM. I found the ball at Hawkshaw. I guess a plug could be made from a Whitworth bolt or stud.

[muskrat]

 

[BSA500]

Yeah yeah I cocked up. Shoot me please

[berger]

how many miles have you done without any oil pressure I did quite a few when I cocked up with the oil lines

[BSA500]

It was the anti sumping ball and spring not the prv so there was pressure  just a lot of wet sumping. Although the arm oil pump held quite a lot of oil back

[berger]

mmmmmm I would of thought without the plug in the pump would just fire the oil into the cases , as in the easy route instead of it going to big ends and camshaft- rockers 

[kiwipom]

mmmmmm I would of thought without the plug in the pump would just fire the oil into the cases , as in the easy route instead of it going to big ends and camshaft- rockers

hi guys, true.

[muskrat]

The splash would have saved the cam & followers. Bush and bigends may need good inspection.
Points for admitting it.
Cheers

[kiwipom]

Musky, how many planets have you been too? Ha ha