/5 oil flow issue

[Craig Barnhart]

I just got some feedback.

Someone said I leaned the bike over too much for the pickup to get oil to
the pump.

If so, should I just put the bike on the side stand and do it again?

On Fri, Jun 18, 2021 at 2:52 PM Craig Barnhart <barney12231963 at gmail.com>
wrote:

> Looks like I'll be disassembling from the rear to get to the oil pump.
>
> https://photos.app.goo.gl/STcPCtZkrEEWXM9G6
>
> You can ignore my unedited speech bloopers at the end.
>
> Craig
>
> On Wed, Jun 16, 2021 at 12:39 PM Craig Barnhart <barney12231963 at gmail.com>
> wrote:
>
>> Thank you sir!
>>
>> That's exactly what I wanted, a direction to go.
>>
>> Maybe I'll take a video to determine what "A LOT" means.
>>
>> On Wed, Jun 16, 2021 at 11:45 AM Tom Cutter <
>> rubberchickenracing at gmail.com> wrote:
>>
>>> Craig-
>>>
>>> I use a system called Divide and Conquer. In this case this means look
>>> at the system in parts. To do this first remove the oil filter cover (bike
>>> laid partly over to left) and see if it is full of oil. A tap on the
>>> starter (plugs out/grounded) will tell you if the oil pump is working. If
>>> you don't get a LOT of oil coming out of the pump cavity very fast, (this
>>> will be messy) then the pump is the problem. On a /5 that means the
>>> woodruff key slipped, so you know where you have to go to fix that. VERY
>>> common fault with the /5 which uses that tiny key.
>>>
>>> Check that, report back.
>>>
>>> --
>>> Tom Cutter
>>> Yardley, PA
>>> www.RubberChickenRacingGarage.com
>>>
>>> "Normalize telling your friends that you love them. Tell them a lot.
>>> Make it weird." --unk
>>>
>>>
>>>
>>>
>>> On Wed, Jun 16, 2021 at 11:35 AM Craig Barnhart <
>>> barney12231963 at gmail.com> wrote:
>>>
>>>> Greetings Airheads,
>>>>
>>>> I have an oil flow issue on my newly assembled 1972 R50/5 project bike,
>>>> and I'm scratching my head trying to determine the next steps.
>>>>
>>>> This is the first time I ever attempted to start the bike, and I am not
>>>> getting oil from the sump to the cylinder heads, and only a residual amount
>>>> to the oil sensor (oil pressure light stays on).
>>>>
>>>> *Background:*
>>>>
>>>> As part of this three-year (part time) project, I replaced all seals
>>>> including the fuel pump's o-ring and cover, the woodruff key, and visually
>>>> inspected (no measurements) the fuel pump. I also replaced the pickup
>>>> gasket.
>>>>
>>>> *What I've done since the issue, not necessarily in this order:*
>>>>
>>>>    1. Read thru this thread:
>>>>    https://advrider.com/f/threads/airhead-oil-priming-problem-ha.746898/.
>>>>    The *Bill Harris, Dec 5, 2011 *entry is the best summary on the
>>>>    page.
>>>>    2. Studied Snowbum's diagram and notes:
>>>>    https://bmwmotorcycletech.info/oilsketch.htm
>>>>    3. Tested the oil sensor switch.
>>>>    4. Filled the oil filter cavity with oil to prime it (laid the bike
>>>>    on its side to fill--learned this trick from Tom Cutter).
>>>>    5. Hand pumped (as best I could) oil into the oil sensor hole to
>>>>    prime it.
>>>>    6. Visually checked the pickup, bolts, and gasket
>>>>    7. Blew air (with an air compressor) into the pickup and felt air
>>>>    coming out of the right cylinder.
>>>>    8. Blew air into the oil sensor hole.
>>>>    9. Blew air into oil filter cavity holes.
>>>>
>>>> *Outcomes after turning over the engine (spark plugs out; green coil
>>>> wire off) for 90 seconds at a time:*
>>>>
>>>>    1. I got a tiny bit of oil into the left head (right side of the
>>>>    left head) at one point of the process.
>>>>    2. Oil is coming into the oil filter cavity.
>>>>    3. There is residual oil in the oil sensor hole (seeps out when
>>>>    sensor is removed), but it doesn't flow out when turning over.
>>>>
>>>> *AFAIK this is what is left to check:*
>>>>
>>>>    1. Oil pump - Visually inspect again and take measurements this
>>>>    time (remove flywheel, etc.)
>>>>    2. Oil pressure relief valve - Make sure it's not stuck open
>>>>    (remove timing cover)
>>>>    3. Ensure front main bearing cap oil passage hole lines up with
>>>>    engine block hole - Not sure if I can do this visually without removing the
>>>>    main bearing or cap  (remove timing cover)
>>>>    4. Something clogged in the system - I don't know how to check this
>>>>    other than blowing air through it.
>>>>
>>>> *Questions:*
>>>>
>>>>    1. Can I narrow it down to one area before disassembling the rear
>>>>    and/or front end?
>>>>    2. Is there any way to test the system after disassembling besides
>>>>    a visual inspection and measurements?
>>>>    3. I can tow the bike to Chris' tech day if anyone thinks it would
>>>>    help to see it in person. Does anyone think it would be helpful to bring it?
>>>>
>>>> Thank you!
>>>> Craig
>>>>
>>>
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