/5 oil flow issue

Fri Jun 18 16:42:37 EDT 2021

oops, I made a typo! SHOULD SAY " If no joy, you know the pump is NOT
working"

--
Tom Cutter
Yardley, PA
www.RubberChickenRacingGarage.com

"Normalize telling your friends that you love them. Tell them a lot. Make
it weird." --unk

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On Fri, Jun 18, 2021 at 4:00 PM Tom Cutter <rubberchickenracing at gmail.com>
wrote:

> I’d put it on the centerstand with a 1/2” shim under the right hand leg of
> the stand. Hold a pan under the filter cavity, because this test gets messy
> if everything is working. If no joy, you know the pump is t working,
> probably because the tiny key slipped out. I glue the key in with Elmer’s
> glue so it doesn’t fall. The glue dissolves in the hot oil and is harmless.
>
> Tom Cutter
> Rubber Chicken Racing Garage
> Yardley, PA USA
> RubberChickenRacingGarage.com
>
> On Jun 18, 2021, at 3:19 PM, Craig Barnhart <barney12231963 at gmail.com>
> wrote:
>
> 
> 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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