Hello all 

Wanted to check the valve clearences on my 86 K100 and replace the old rubber washers 

I was suprised to see that the rocker cover bolts have a shoulder between the head and thread 

Do I need to cut the old rubber ones off because i cant pull them pass this shoulder and then will the new ones push on pass this shoulder ? 

Before i stuff them

They should be able to roll over without damage, but if they are too old and brittle the odd one might break.

The shoulder is a good idea to prevent the rubber washer from being overtightend. Some BMW cars also have them.

yes Mathew , replace them all , once done the pressure to the cam cover and crank cover inner gaskets is restored

from memory 22 required

the usual suspects o/s are worth checking for price

good luck

22 for the whole engine Charlie - 12 for the cam cover. I've just been out and counted the new set I bought because like Matt, I need to change all of the cambox rubber.

Matt: yes, the new ones will push over the shoulder. If you're worried about them catching, a smear of silicon grease is a great help. If you look at the shape of the bolt, it's designed to bottom out on the cam cap so that as Daveyson says, the pressure on the rubber is correct. There's a downside: do NOT overtighten the bolts once they bottom out because you WILL strip/shatter the cam cap threads. Screw in until they touch down and then one-eighth of a turn further. I think that equates to about eight ft/lbs but it's always done me as a rule of thumb.

The torque for the engine side cover bolts is 8 +/-1 Nm.  (5.9 ft-lbs, 71 in-lbs)

Matt I have new washers put aside for my 75 not enough for your 100 but if you get stuck give me a yell.
Regards Martin.

I must be weak these thing are solid as a rock, even the Stanley blade dose not want to cut into them  

hope that the new  ones are easier to push over the shoulder

Use the Force young Matt. Do or do not there is no try.
Regards Yogi.

Try softening the rubber with a heat gun or hair dryer. Let it cool so you don't burn your fingers. I soaked a hardened fuel filler gasket with a 50/50 mix of Rubbing Alcohol and Oil of Wintergreen it however took a long time and once left it hardened back up.
Regards Martin.

Try softening the rubber with a heat gun or hair dryer. Let it cool so you don't burn your fingers. I soaked a hardened fuel filler gasket with a 50/50 mix of Rubbing Alcohol and Oil of Wintergreen it however took a long time and once left it hardened back up.
Regards Martin.

Stick a blunt screw driver between and lever over the shoulder, doesn't matter if they break, you're renewing anyway.

@Matthew-Brisbane wrote:I must be weak these thing are solid as a rock, even the Stanley blade dose not want to cut into them  

hope that the new  ones are easier to push over the shoulder

a good big set of sidecutters  works mate .....ask me how I know ....and I know you either have them or can borrow them ....eh?

New ones will be good, old ones have got brittle.