Timing chain removal/installation

[jamestnewsonr65]

There is one bit of my bike which is bugging me.

I cleaned up all the external parts when I refurbished the bike and had the engine top cover and air box powder coated. The only part I didn't get powder coated at the time was the timing cover and now it just sticks out like a sore thumb!

I would like to get this part powder coated / painted and have the clymer manual to follow for the procedure.
I have a couple of questions to ask.....

1. Is it ok to powder coat this part as long as the front and back are completely masked off?

2. Are there any other parts/gaskets needed except those listed below which are needed for the installation?
I've had a look at realoem and can't seem to see anything else needed, but clymer mentions replacing both the camshaft and crankshaft oil seals.

Alternator Seal (11 14 1 255 011)
Timing chain cover gasket (11 14 1 338 428)
Upper case gasket washer x2 (11 14 1 338 429)

Any other pointers on possible jobs whilst I have the cover off would be much appreciated.

Bike is a 65LS dated 12/1981

[Bob_Roller]

There is only one oil seal, shaft seal and that is for the crankshaft .

http://www.realoem.com/bmw/showparts.do?model=0364&mospid=51897&btnr=11_1711&hg=11&fg=14

Item # 8 .
The camshaft seal is an o-ring on the ignition canister, aka the beancan .
You only need the other three gaskets that you have already mentioned .

[jamestnewsonr65]

Great thanks, always good to have clarification on these things.

[Ed Miller]

Why do you need any new gaskets or seals to pull off the front cover for powder coating?  

[Bob_Roller]

Well, most likely, they are the originals, a little over 33 years old .
I know I would not reassemble with old parts like that .

[montmil]

Why do you need any new gaskets or seals to pull off the front cover for powder coating?  

The item in question is the timing case rather than the front engine cover.

IMHO, I'd consider replacing the chain, tensioner bits and chain guide, "while I was in there".

[montmil]

Why do you need any new gaskets or seals to pull off the front cover for powder coating?  

The item in question is the timing case rather than the front engine cover.

IMHO, I'd consider replacing the chain, tensioner bits and chain guide, "while I was in there".

[jamestnewsonr65]

Are there any special tools needed to remove the alternator rotor from the camshaft?

I was thinking of removing the timing chain and tensioner, but will have a look at the ones on there before I decide.

[montmil]

Are there any special tools needed to remove the alternator rotor from the camshaft?

Yes. There is a hardened, simple tool required that screws into the nose of the shaft. Several incidents of owners making up a similar "looking" tool made from a softer bolt. End result is the bolts deforms and jams everything together, leading to more expensive extraction repairs. Ugh.

Check with MotorWorks or Motobins and buy one. Very economical so no sense in trying to save a quid and buggering the deal.

[jamestnewsonr65]

Are the timing covers cast aluminium or steel?
Sorry for the questions but i'm not where the bike is at the moment so cant check with magnet.

[Barry]

This diagram shows nicely what is going on when the rotor bolt is substituted with a removal tool.

[montmil]

The timing chain case is aluminum.

The tensioner shoe that rides against the chain has a plunger that is backed up by a coil spring. There is a specification for the spring's relaxed length -look up Snowbum's site for that- and I found my R65's tension spring too short after many years of service.

I bought the full timing chain replacement kit from Motobins that had everything in one tidy package for less cost than buying the individual bits n' pieces.

Also, I have a photo-essay on replacing the R65 timing chain in this forum's Photo Gallery. Check it out as there are a couple tricks that I wish I had known before starting that project. If you do not yet have your double-secret ticket to the gallery, contact a forum administrator for your kitchen pass.

[Ed Miller]

I thought all he wanted to do is powder coat the front cover.  So you want to powder coat the timing chain cover, too?  The little part that's exposed to the outside?  

[jamestnewsonr65]

It is the timing chain cover I am looking to powder coat, otherwise I wouldn't need the seals or special tool.

[jamestnewsonr65]

@Montmil, I dont suppose you have the photo documention you created of the timing chain replacement as i've requested access to the photo gallery section but no reply as yet.