The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Tv on December 09, 2009, 04:47:57 AM
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G'day, I recently did my first oil change and filter replacement but am suspicious I've made a mistake. I read http://bmwmotorcycletech.info/Oil.htm and I'm confused so I removed the filter I put in and it's a 1142 1 337 572 which is the old type single cannister bonded rubber at both ends. All I did when I changed the filter was remove what was there and replaced with this unit. This 'white $2000' O ring is red on my bike and there is a gasket on the engine plate which is paper one side and plastic on the other. There are no other bits. Should there be metal rings?
Tomorrow I'm getting a new filter, white ring (didn't they write a song about that in the '70's) and gasket. Is there anything else?
Thanks and REgards
Tony
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G'day Tony
Changing a filter on any engine should be a simple process. Unfortunately for us ours are not the easiest and while we all love our airheads an honest man would have to say it's a lousy bit of design. A good understanding of this is almost a right of passage to Airhead ownership.
The crux of the matter is that the 2000$ O ring needs to be under sufficient compression to form a good seal under pressure. Also on earlier models the O ring needs to be protected against the sharp edge of the internal canister. Both of these objectives are achieved by fitting a thin metal shim between the O ring and the canister. If you don't have the shim it may or may not be be a problem. To get the full info on this check out the link below. We all have great respect for Snowbum but I think this gives the clearest explanation.
http://www.largiader.com/tech/filters/canister.html
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A red O-ring is OK. When you see the white one it will be the same size.
Metal Shims (washer) goes in first. How many you need depends on the difference between the outer edge of the engine case and the outer edge of the canister. (Initially I measured this depth with a tire tread depth gage.) If the distance is too great, the oil goes around the edge of the o-ring (either red or white) and drops into the sump (without going through your engine). So effectively you have a "leak" you can't see. You need to read these articles and measure the distance between the canister and the outer edge, probably get rid of the paper rubber gasket on the case surface and use the appropriate number of metal shims between the oil filter canister and the large ($2000 dollar) o-ring. Remember shims first then the o-ring then the cover.
One good way to know you are doing right is to lose the paper gasket and just have the metal on metal of the outer cover. If you have got the right pressure on the o-ring, oil wont leak outside the filter cover on the outside of the bike.
Be careful not to over torque the three bolts that hold the filter cover to the case. Realy tight does nothing other that to strip the threads in the case.
Good luck.
BTW - mine 1980/03 R65 takes two shims and no paper gasket. Your results may vary.
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OK I'll give that a try. Thanks for your help
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My 1984 has never had any metal shims, or paper gasket, so I am guessing yours shouldn't need them either?
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Thanks Bruce and everyone else for your help. I have a good understanding of what's happening now and I'll get it all happening.