happy wanderer
Day Dreaming ...
That looks _exactly_ like what I mentioned. It really appears to have been whacked hard enough to punch the aluminum backing out. In other words, the sight glass was driven in too deep.
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Caterpillar makes this green stuff that works really good.
So good, you will never, ever, remove the seal in the lifetime of a sea turtle.
On all of our other oilhead or K bikes I install clean and dry per BMW procedures.
The back roads blow out is not as common. I have noticed that most people have theirs go just like you did, upon start up at the beginning of the day.
Mine did the weep thing, so I replaced it.
If the crankcase vent isn’t working there can be quite a bit of pressure. On my 1979 Honda CB750, there was a rather involved H shaped valve cover gasket that would not stay sealed resulting in oil on my pant leg and shoe.
I stumbled on to the cure for the gasket blow out which was to pull the plug on the lower crankcase hose which allowed the condensation to drain, the crankcase to breathe and the valve cover to stay sealed.
Anyone remember a 225 slant 6 with a bad PCV valve?
OM
Oilhead crankcase venting keeps the base pressure at minimum.
Yes but: The change in pressure from those two big pistons moving inward together and outward together is much greater than on the K series bikes with 3 or 4 or 6 pistons going every which way as the crank rotates.
I can't explain the physics, but all of the 5 or 6 cases of blown sight glasses I am aware of happened at cold start up. The first was when Voni's R1100RS was one month old in June 1993. It happened near Salt Lake City. She was towed in to the dealership when, as it happened, the VP in charge of motorcycles at BMWNA was visiting the dealership. (So was Harrison Ford but that's a different story.) They had a new sight glass overnighted from Germany.
Agreed but my point was the oilhead is different than an auto engine with a PCV valve.
Seems mine on my 97 r bike needs replaced. Can't see the oil level anymore. Has anyone tried using air pressure inside the crankcase while trying to remove the sight glass? Just enough so if it brakes, it doesn't go into the engine? Of course, safety glasses would need to be worn...just a thought.
Seems mine on my 97 r bike needs replaced. Can't see the oil level anymore. Has anyone tried using air pressure inside the crankcase while trying to remove the sight glass? Just enough so if it brakes, it doesn't go into the engine? Of course, safety glasses would need to be worn...just a thought.
Yes, I saw those. I ordered one from Beemer Boneyard. Max had them cheaper last week, for some reason. I was going to order the factory one from them. Went back yesterday, and it was the standard price so I ordered the aftermarket unit.Went to Max's fiche to see about having a spare.
There is a PDF next to the part that shows how to remove and install it.
Many different tools to clean out, some not mentioned here.
Maybe worth checking out.
Would judicious use of heat around the casing help loosen it?
Does anyone make a dipstick option?