The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: jonathanrowley on June 24, 2016, 02:46:55 AM
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So, with the heat and the move of country I finally got round to treating the R65, after all it's recent ignition and charging troubles, to some clean Oil.
Yukki Black Oil of course, but revealed an Oil Filter that was a little deflated. Anything to read from this?
Anyway, love the feeling of an Engine absorbing Fresh Oil...
It must going - "at last, thank you, it's been hot in here you old git, about time you got back to the basics - the Electrics have had enough fuss thanks!"
Do Engines have feelings - or am I going mad?
;)
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You are not going mad. Filters have been getting crushed occasionally for almost 40 years. Take a look at an earlier post.
http://www.bmwr65.org/cgi-bin/yabb2/YaBB.pl?num=1269110468/0#0
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Thanks Barry - I read the Snowbum site so primed the Engine with plugcaps off before trying to start it
- hopefully then this one will fare better now that the Sparks are in good shape and its pulling like a train at low revs.
Might lay it over and inspect in a few weeks... nice to know it's common and not me. Again my filter is a HiFlo non OEM.
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Not exactly common but it can happen and to every type of filter including OEM and the two part ones. I wouldn't read too much in to Hiflo being the prime cause as they are quite commonly used by others without problems. I still think excessive axial compression of the filter can predispose them to collapse and I'm now more careful with that. I've never had a problem with a crushed filter since.
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Thanks Barry - you've put my mind at rest. Bike is running great over here now! I think we interacted on the BM Bikes forum while I was building it - yes? Cheshire...
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Yes that was me !
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In very cold weather, the 20W50 engine oil is thick and flows as slow as cold Spring molasses. If a rider revs the engine in an ill advised effort to warm the engine, that thick oil will, on occasion, crush a paper filter. Airheads develop very high OP with cold oil.
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In the UAE, I expect that even your cold engine temps can be similar to our temps with the engine already running, but a few things to note-
1. Yes, as Barry points out, this can happen with pretty much any brand of filter. I've very rarely seen it happen with the Mahle filters from the BMW dealers though. I've had several WIX brand filters collapse.
2. Many folks give up a bit of filter area by using the "hinged" filters (I do this too) as the hinged filters (designed for going in the airheads with the oil coolers, initially) have (2) shorter segments, and 2X the metal endcaps, and appear less prone to crushing in all cases. YMMV. I generally change the oil filter with every oil change, so I don't think that losing a bit of the filter area is an issue - if I only changed the filter every second oil change, well, maybe that would be different.
3. As Monte points out, the airheads generate impressive oil pressure when started, and with cold, thick oil can peak 130 PSI. It is always best to let the ol girl warm up a bit before revving her up above 3K, in my opinion.
4. You can search on the internet for the $2000 O-ring threads if you wish, but basically you know you're getting the right amount of Axial pressure on the oil filter and the sealing, white rubber O-ring when the O-ring (coming out from being installed) has a slightly squarish appearance in cross section - not mashed flat by any means. Just so that it does not look like it is round anymore. There are many treatises on it by the likes of Snowbum, Paul Glaves, and others, over whether the ideal compression is 15%, or 20% or 25%.... as long as it is somewhere in that range - you're good.
5. If you don't change your filter often enough, the partly clogged filter can experience greater pressure differentials (because it is clogging) and be more prone to collapse - just change it with every oil change, and make the oil changes at reasonable intervals, and you should be OK.
Hope this helps,
Mike
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Thanks all, good knowledge, shouldn't be a problem with cold here!
Well into the 100f now..
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2. Many folks give up a bit of filter area by using the "hinged" filters (I do this too) as the hinged filters (designed for going in the airheads with the oil coolers, initially) have (2) shorter segments, and 2X the metal endcaps, and appear less prone to crushing in all cases.
Actually the hinged filter pre-dates the oil cooler equipped model. The 1977/78 R100RS does not have an oil cooler, it needs the hinged filter in order to get around the fairing and fairing supports. This 1st model hinged filter is the same overall length as the "straight" filter. I think you will find that the later oil cooler model filter is in fact slightly shorter.
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Tony is right about that. The change BMW made with the oil coolers was to introduce the $2000 o-ring and using the filter cover to hold everything in place instead of bolting the filter to the engine like the older bikes do.