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Bertie is bleeding (oil) inside the timing cover, any thoughts as to why?
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Bertsbike
Eastbourne
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August 26, 2019 - 8:23 pm
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Today Bertie behaved well after cleaning the plug and re-setting the points. When I did the later I found a trickle of oil on the inside of the timing cover which I hadn't noticed before. After a run today, during which I was surprised that the D1 plungers heart (engine) started fist kick, I have removed the cover again to photo and show-&-tell the forum to see if there's anyone who can enlighten me on its worrying cause.

hope you can help.

In the photo the cover is the right way up but back to front obviously.

IMG_5418.jpeg

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1950 BSA Bantam D1 plunger, 1979 Honda CB250NA Superdream, 1975 Honda C50,

Don't ask; Don't get!

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chickensoup
Bolton, Greater Manchester
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August 26, 2019 - 9:04 pm
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Hello there,

It doesn't look like oil is flooding out of a major component through an oil seal. Have you oiled the felt pad which lubricates the points cam recently.

As you say, Bertie seems to be running well, so again, if you had a bad oil leak, I think you would of noticed it.

On the negative side, the only other way oil can get into this area of the engine would be from the chain. The engine crank case and cover, may have been damaged if the drive chain had snapped at some point in the engines life. Oil can flick off the chain, and pass into the flywheel area. This is not the end of the world though, as the hole can be plugged with metal filler. Hopefully your engine wont have this damage.

I would clean the area and monitor to see if it continues.

Hope this helps sort your problem..... Nick

1950 BSA D1 Plunger   242 UYW

1966 BSA D7  LBF 62 D

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sunny
Norfolk
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August 27, 2019 - 6:36 am
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has the  crankshaft    been   inspected  coz  if the  bit  that   sits  in the   oilite  bush   wont   stop  it  from  opening  up  the oil seal

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Bertsbike
Eastbourne
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August 27, 2019 - 9:28 am
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chickensoup said
Hello there,

It doesn't look like oil is flooding out of a major component through an oil seal. Have you oiled the felt pad which lubricates the points cam recently.

As you say, Bertie seems to be running well, so again, if you had a bad oil leak, I think you would of noticed it.

On the negative side, the only other way oil can get into this area of the engine would be from the chain. The engine crank case and cover, may have been damaged if the drive chain had snapped at some point in the engines life. Oil can flick off the chain, and pass into the flywheel area. This is not the end of the world though, as the hole can be plugged with metal filler. Hopefully your engine wont have this damage.

I would clean the area and monitor to see if it continues.

Hope this helps sort your problem..... Nick  

I did re position the felt pad as it was not touching the cam, then oiled it. it looks like there is a jet of air blowing the oil out onto the cover and as you say I will monitor it from now on. The chain is fairly dry I don't feel its a likely source.

1950 BSA Bantam D1 plunger, 1979 Honda CB250NA Superdream, 1975 Honda C50,

Don't ask; Don't get!

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Bertsbike
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August 27, 2019 - 9:30 am
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sunny said
has the  crankshaft    been   inspected  coz  if the  bit  that   sits  in the   oilite  bush   wont   stop  it  from  opening  up  the oil seal  

I haven't had the engine apart so I'm not sure what to look for.

1950 BSA Bantam D1 plunger, 1979 Honda CB250NA Superdream, 1975 Honda C50,

Don't ask; Don't get!

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cocorico
Central France
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August 27, 2019 - 9:37 am
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I think I'd clean it down, remove any excess oil from the cam lubricator, points pivot area and the support bush and monitor it. If she's starting OK, I wouldn't worry about the crank seals just yet.

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

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carpetralph
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August 27, 2019 - 5:28 pm
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Not running down the wiring sleeve and dripping onto the points cam is it?.  I had that on one of mine, the jet of fuel when tickling the carb was hitting the wiring, the petrol was evaporating and just leaving the oil behind.

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Bertsbike
Eastbourne
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August 27, 2019 - 10:08 pm
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carpetralph said
Not running down the wiring sleeve and dripping onto the points cam is it?.  I had that on one of mine, the jet of fuel when tickling the carb was hitting the wiring, the petrol was evaporating and just leaving the oil behind.  

There’s a thought. It’s probably not but it’s got me thinking.
Perhaps I should get Bertie running and place a piece of paper in stead of the cover and see if there’s any further info to be drawn from this issue.
If there’s a squirt I should see it at some stage.
I will update this post as I get further into the investigation.
Cheers all. 👍

1950 BSA Bantam D1 plunger, 1979 Honda CB250NA Superdream, 1975 Honda C50,

Don't ask; Don't get!

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