The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Rudolf35 on July 30, 2014, 01:08:11 PM

Title: Engine vent rattle
Post by: Rudolf35 on July 30, 2014, 01:08:11 PM

Coming from, still have, a 71 R50/5 I noticed a distinct rattle coming from under the starter cover of my new to me 82 R65LS.

I can say without a doubt that the rattle is coming from under the starter cover because I put a stethoscope to the starter cover and the sound is emenating from a bit aft of the weep hole. If it where a /5 I would say the reed valve is rattling but on a R65 I am a new owner. The sound is like a nut in a small pill bottle, metal on plastic rattle.

The question is - is that the "norm" for a healthy R65 or.....?
 :-/

Title: Re: Engine vent rattle
Post by: Barry on July 30, 2014, 01:52:17 PM

R65's have much the same engine breather valve as other airheads. I'm not sure if an 82 still had the disk type breather or the later reed type. The disc type can certainly make a honking noise but I wouldn't describe it as a rattle.

Title: Re: Engine vent rattle
Post by: montmil on July 30, 2014, 04:07:40 PM

Why not remove the cover and take a look?

Title: Re: Engine vent rattle
Post by: Rudolf35 on July 30, 2014, 09:26:54 PM

Oh, I will look! Just out testing before I tear into it.

Title: Re: Engine vent rattle
Post by: montmil on July 31, 2014, 08:05:28 AM

We have a knowledgeable forum member roosting in Bedford, Texas that you might actually know. Mike Crenshaw, aka on the R65 forum as 'Bengt Phorqs'. He usually hits up BMW of FTW on Saturday mornings just to soak up their free coffee and donuts.

Title: Re: Engine vent rattle
Post by: Rudolf35 on July 31, 2014, 10:08:59 PM

Quote

He usually hits up BMW of FTW on Saturday mornings just to soak up their free coffee and donuts.

BMW of FtW is moving. Somewhere on the other side of 820W. But he has the right idea, free brew. He probably knows me and my R50/5. I do most of my airhead socializing with Boxer Bruce.
(https://farm6.staticflickr.com/5562/14564186118_2dd81b76ec.jpg)
1983 R65LS Baby Photo

(https://farm3.staticflickr.com/2856/13412046623_909bcd9df9.jpg)
1971 R50/5

(https://farm8.staticflickr.com/7174/13897092924_fef344749e.jpg)
2013 Ural GearUp

 :D

Title: Re: Engine vent rattle
Post by: nhmaf on August 01, 2014, 08:30:56 AM

The 1981+ models should definitely all have the reed valve breather installed.   I've never had an issue on my 82 R65LS with the valve but I suppose it is possible if things have gotten very gunked up in there it could be noisy or it could possibly break/crack.

Nice looking URAL you have - do you get to use 2WD much where you are?

Title: Re: Engine vent rattle
Post by: Rudolf35 on August 01, 2014, 06:03:39 PM

Take the Ural off on county roads, calichi, and trips on the TAT in AR.