timing cover removal

[2slowwheels]

I'm just starting a project on an unloved 1979 R100T I picked up. In trying to remove the timing cover it doesn't want to release at the bottom. Can I gently pry it off or am I missing something else? The manual only refers to the two allen heads on each side. Thanks

 

[manicmechanic]

One more screw at the bottom. Also, I hope you have disconnected the ground wire from either the battery or the frame.

 

[wecm31]

One more screw at the bottom.

Really??

My 85 only has the two, there is a "anti-rattle" pin at the bottom.
A quick check of an online part fiche shows the same.

I would try a little perimeter tapping with a rubber mallet.

And just to speak proper Airheadese..... You mean the front engine cover, right?

The timing cover is behind the alternator and the points/bean can. That cover
has 9? bolts.

 

[2slowwheels]

Yes, the engine cover, yes the battery is out of the bike. My Clymer manual only shows the two allen bolts. Thanks

 

[barryg]

The timing cover is removed using a extracter tool. Special puller BMW part number 214. This is do to the nose of the crank being a tapered end. Another special tool is used locating the cover for refitting. BMW part # 225. The cover is also heated to 80-100 degrees for reassembly.

 

[barryg]

I'm talking the timing chain cover.

 

[mneblett]

My 85 only has the two, there is a "anti-rattle" pin at the bottom.

A quick check of an online part fiche shows the same.

I would try a little perimeter tapping with a rubber mallet.

Not good advice for an earlier bike -- the 70's bikes (including, IIRC, the '79 RT) have a third bolt, bottom center under the cover as shown in this /5 drawing, which is conveniently cut away at the lower bolt:

 

[pauls1150]

Sounds like the gasket around the points cavity has turned to crud and is somewhat bonding that area. Caution required and don't expect to re-use that little square worm.

 

[2slowwheels]

The front engine cover, I wrongly called the timing cover, did come off with gentle persuasion. It was just to two bolts and a centering pin at the bottom.

 

[mneblett]

The front engine cover, I wrongly called the timing cover, did come off with gentle persuasion. It was just to two bolts and a centering pin at the bottom.

Ok -- the bottom pin must have come in when the /7's square-edged cover was introduced.

On the timing chain cover -- I do not recall using any special tools to remove this cover on either the /5 or my '88 RT. I do recall there being more than two bolts, including a couple mid-lower ones in recessed areas. As soon as I get home, I'll pull my manuals and post an answer.

 

[ISAMEMON]

yep, if it has been a while they can be reluctant to leave "home"
but nowthat you got it off think about the future. clean that place, little antisieze would not hurt, but I have never used it there
I bet your good now for a few more times
aint it fun working on old neglected bikes, yahoo

 

[wecm31]

Glad to hear you got the cover off eventually.... I guess she was a little
bonded in place after a decade or three. Good point from Isamemon wrt anti seize,
it would be good for the next 30!!


To further the discussion on the timing cover, here is a pic. Part fiche shows
3 #10s and 9 #4s, total of 12 nuts/bolts holding the timing cover on.

 

[PeoriaMac]

To clarify -- the Front cover had three bolts at least through the /7 series. By the monoshock airheads there were only two...

 

[2slowwheels]

The bike is a 1979 R100T. It had two allen bolts and only a centering pin at the bottom, no hole in the bottom of the cover to insert a threaded bolt into.

 

[bmwwrench]

Yes, '79 on use only two bolts to retain the front cover. The bottom hole was often a bit tight around the pin, and I used to open the hole up with a drill.