BMW K bikes (Bricks)

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1Back to top Go down   Rocker cover rubber washers  Empty Rocker cover rubber washers on Sat Aug 17, 2019 11:05 pm

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
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


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1986 K100 RS Motorsport
#### K100 RS Project 
2011 R1200 GS
    

2Back to top Go down   Rocker cover rubber washers  Empty Rubber washers on Sun Aug 18, 2019 12:04 am

daveyson

daveyson
Silver member
Silver member
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.


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11/1985 bmw k100rt (late model)  Vin. 0090567
    

3Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Sun Aug 18, 2019 7:12 am

charlie99

charlie99
VIP
VIP
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


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%ORocker cover rubber washers  Au-log10

"redframe" rs "bitsa"  with many contributions from the k100 community ,,with many thanks
    

4Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Sun Aug 18, 2019 9:55 am

Dai

Dai
Life time member
Life time member
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.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

5Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Sun Aug 18, 2019 5:20 pm

duck

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


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

6Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Sun Aug 18, 2019 6:13 pm

MartinW

MartinW
Life time member
Life time member
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.


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K75s Hybrid
    

7Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Mon Aug 19, 2019 3:01 am

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
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


__________________________________________________
1986 K100 RS Motorsport
#### K100 RS Project 
2011 R1200 GS
    

8Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Mon Aug 19, 2019 3:06 am

MartinW

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


__________________________________________________
K75s Hybrid
    

9Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Mon Aug 19, 2019 3:17 am

MartinW

MartinW
Life time member
Life time member
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.


__________________________________________________
K75s Hybrid
    

10Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Mon Aug 19, 2019 3:17 am

MartinW

MartinW
Life time member
Life time member
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.


__________________________________________________
K75s Hybrid
    

11Back to top Go down   Rocker cover rubber washers  Empty washers on Mon Aug 19, 2019 3:19 am

daveyson

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



Last edited by daveyson on Mon Aug 19, 2019 5:35 am; edited 1 time in total


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
    

12Back to top Go down   Rocker cover rubber washers  Empty Re: Rocker cover rubber washers on Mon Aug 19, 2019 3:25 am

charlie99

charlie99
VIP
VIP
@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?


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%ORocker cover rubber washers  Au-log10

"redframe" rs "bitsa"  with many contributions from the k100 community ,,with many thanks
    

13Back to top Go down   Rocker cover rubber washers  Empty washers on Mon Aug 19, 2019 3:25 am

daveyson

daveyson
Silver member
Silver member
New ones will be good, old ones have got brittle.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
    

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