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Author Topic: Leaking Cylinder  (Read 958 times)

Offline BooG

  • Lives in Foothills of Mt. Olympus
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  • Posts: 186
Leaking Cylinder
« on: September 24, 2008, 08:55:55 AM »
A close inspection has revealed that the starting probs I have had could be down to a lack of compression. The left cylinder is "bubbling" very slightly on top: you can only just see it, but you can hear a faint hiss as the bike is running if you place your ear near the cylinder.
I suppose this is the moment to pull the jugs, do the pushrod tube seals, replace the o-rings etc.
Any links for cylinder removal? Never done this before. At least my exhaust nuts are ok.
After that I might get to do the driveshaft gaitor!! All seems to arrive at once dosen't it??
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BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987


Offline steve hawkins

  • Mt. Olympus Resident
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Re: Leaking Cylinder
« Reply #1 on: September 24, 2008, 10:08:13 AM »
Hope you have not just washed the bike....It could be residue water boiling off.

Normally a squeek is associated with this sort of thing?
« Last Edit: September 24, 2008, 10:09:01 AM by steve_hawkins »
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Steve Hawkins R100 (that wants to be an R65)

Offline jusgus

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  • Posts: 62
  • Doin good ain't got no end.
Re: Leaking Cylinder
« Reply #2 on: September 25, 2008, 06:38:49 PM »
Is the cylinder bubbling at the valve cover or the head gasket.  I too have seen steam after washing mine.  Also I had a terrible time getting her to crank last week and found that the jam nut on the choke adjustment sleeve on the right hand carb had backed off and I was only choking the left side.  She started but it took forever and I did not find the problem until the second day after several hard cold starts.
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Offline BooG

  • Lives in Foothills of Mt. Olympus
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  • Posts: 186
Re: Leaking Cylinder
« Reply #3 on: September 26, 2008, 11:39:14 AM »
The actual leak seems to be from the cylinder base, topside. There is some oil staining also. Ther new 0 rings and various gaskets have arrived, but I won't be able to sort it now till Monday. I am also half way through replacing the driveshaft gator!! Not only that, but I'm gonna try helicoiling the center studs also....then pushrod seals....then, if I can afford it...I might get a new battery!! Then I need to pay my girlfriend some attention....she thinks I'm obsessed!
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BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987


Offline beemer

  • Lives in Foothills of Mt. Olympus
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  • Posts: 320
  • The Red Tomato!!!
Re: Leaking Cylinder
« Reply #4 on: September 26, 2008, 03:31:03 PM »
Quote
The actual leak seems to be from the cylinder base, topside. There is some oil staining also. Ther new 0 rings and various gaskets have arrived, but I won't be able to sort it now till Monday. I am also half way through replacing the driveshaft gator!! Not only that, but I'm gonna try helicoiling the center studs also....then pushrod seals....then, if I can afford it...I might get a new battery!! Then I need to pay my girlfriend some attention....she thinks I'm obsessed!
You don't have girlfriends if you own a r65,you have a very tolerant wife!!! :D
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