BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   [solved]valve cover bolt grommets Empty [solved]valve cover bolt grommets on Thu Jan 31, 2019 4:31 am

tinyspuds

tinyspuds
Silver member
Silver member
Got new grommets to refit valve cover. They are identical to the old ones, just plumper and softer. -5 in my workshop today so they might just need warming up, but before I start: 

the grommets should just be a push fit over the bolt ridge so that they sit between the collar and the head?

Reason for asking is that feels very unlikely given the resistance I’m meeting at the bolt collar and the old ones are so compressed, cracked and hard there would be no point re-using.

Is there a trick to this?

Cheers, Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

2Back to top Go down   [solved]valve cover bolt grommets Empty Re: [solved]valve cover bolt grommets on Thu Jan 31, 2019 4:40 am

charlie99

charlie99
VIP
VIP
trick is ...cut the old ones off with side cutters

put some slippery stuff on the new rubbers before attempting to install them

just take them inside , fill the sink with warm water and dishwashing liquid ..and then attempt to fit them ???   just an idea

don't forget to degrease them first , or youll never hear the end of it  from "she who must be obeyed "   giggles


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O[solved]valve cover bolt grommets Au-log10

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

3Back to top Go down   [solved]valve cover bolt grommets Empty Re: [solved]valve cover bolt grommets on Thu Jan 31, 2019 8:52 am

Dai

Dai
Life time member
Life time member
Once you feel the bolts meet resistance, don't tighten them more than a further 1/8 turn. If you do, you stand a good chance of cracking the cam cap. If you're worried that's not tight enough, I'm sure you've got a bottle of threadlock somewhere in the garage Very Happy


__________________________________________________
'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)
    

4Back to top Go down   [solved]valve cover bolt grommets Empty Re: [solved]valve cover bolt grommets on Thu Jan 31, 2019 10:15 am

tinyspuds

tinyspuds
Silver member
Silver member
Thanks Charlie. Actually had a brain wave: sat grommet on a 13mm socket, inserted bolt + wd40 and gently applied vice. Worked a treat.

Of course, If I hadn’t done that I wouldn’t have been able to re fit the cover, torque everything down to 5lbs and shear the last bolt!

Anyone know if the rearmost bolt in the spark plug recess is absolutely vital?  Embarassed


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

5Back to top Go down   [solved]valve cover bolt grommets Empty Re: [solved]valve cover bolt grommets on Thu Jan 31, 2019 10:25 am

tinyspuds

tinyspuds
Silver member
Silver member
Thanks as always Dai. Wish I had wifi in my workshop. Got to go out and buy ‘stud’ extractor...


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

6Back to top Go down   [solved]valve cover bolt grommets Empty valve cover bolt grommets on Thu Jan 31, 2019 12:45 pm

audibob

audibob
Platinum member
Platinum member
Cracked Cam caps,   and my cracked casting.

This now has a stud in place.

I used new grommets, and hand tightened VERY carefully...


Bob


[solved]valve cover bolt grommets 20180512


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

7Back to top Go down   [solved]valve cover bolt grommets Empty Re: [solved]valve cover bolt grommets on Mon Feb 25, 2019 10:42 pm

tinyspuds

tinyspuds
Silver member
Silver member
Sheared bolt drilled and helicoiled. Will never go near here with a torque   wrench again. The pinch point is quite obvious to the touch with a small socket. One bolt needed a further 1/16th of a turn after 700 miles but otherwise weep free.
Thanks all. Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum