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Rocker cover on 1100 engine.

edwin

Enthusiast
Messages
185
Location
Lichfield
#1
Hi. We have a spanish GTL, and the two bolt holding the rocker cover on are quite different. One has a hemispherical"washer" which spreads the bolt load onto the cover. The other has washers and rubbers which must do something similar, but not as well as there is a small but persistent leak. As there will be someone out there who knows the truth, can they confirm that the domed washer is correct, and if so has anybody got a spare so that I have matching pair. If not can someone supply what should be there.
Thank you.
 

laxeian

Enthusiast
Messages
218
Location
Galicia
#2
On my Fasa F6 the rear rocker bolt holds bracket for ‘ rattle suppression ?’ spring on gearleaver, front has small bracket that holds petrol pipe and wiring off of direct contact with rocker/head, both these have a rubber grommet/ bush that when bolted down seals.
There are washers available at hardware stores here for roofing purposes that are like slightly domed spreadwashers with rubber bonded to the underside which is a tight fit over the thread, under a nut they provide a seal on the surface bolted to and thread, two may suit purpose.
Nuts are brass/copper nuts with a spread base.
 

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mr-reno-139

AKA Paul Cunningham
Messages
1,941
Location
lancing west sussex england
#3
Favtory fit is m7 threaded nut with flat steel washer built into nut
Fibre washer needed under it
Overtightenig distorts cover
May need removing and tapping flat from underneath to stop leak sucesfully
Most fibre washers easily available will be 6mm too small or 8mm too big
 

edwin

Enthusiast
Messages
185
Location
Lichfield
#4
On my Fasa F6 the rear rocker bolt holds bracket for ‘ rattle suppression ?’ spring on gearleaver, front has small bracket that holds petrol pipe and wiring off of direct contact with rocker/head, both these have a rubber grommet/ bush that when bolted down seals.
There are washers available at hardware stores here for roofing purposes that are like slightly domed spreadwashers with rubber bonded to the underside which is a tight fit over the thread, under a nut they provide a seal on the surface bolted to and thread, two may suit purpose.
Nuts are brass/copper nuts with a spread base.
HiLaxian, and thanks for the email. I think that is what is on the front of mine, and so that is what I need for the other. Is there any chance of getting a couple of the domed spread washers ( so I know they are the same) and posting them to me. Otherwise its a very small order for a business to deal with. I can send some euros as required.
You can conversation me and we can exchange contact info. Regards Edwin
 

edwin

Enthusiast
Messages
185
Location
Lichfield
#5
Favtory fit is m7 threaded nut with flat steel washer built into nut
Fibre washer needed under it
Overtightenig distorts cover
May need removing and tapping flat from underneath to stop leak sucesfully
Most fibre washers easily available will be 6mm too small or 8mm too big
Thanks Andy. I will look at this as well. I suppose I could sand the 8mm fibre washer down. Laxians domed spread washer appears to be what is on the one end of our rocker cover, and that end works well, so if he will send them, I will start there, and then try your idea. I will take note of your suggestion to try and flatten out the cover. Regards Edwin
 

mr-reno-139

AKA Paul Cunningham
Messages
1,941
Location
lancing west sussex england
#6
The measurement I was talking about is the diameter of the hole in the center which would fit over the stud
 

laxeian

Enthusiast
Messages
218
Location
Galicia
#7
Hi Edwin,
Will pick up some and message you, there sold singularly so I’ll send 6, you’ll have spares just incase the rocker needs to come off/on.
Best
Ian
 

edwin

Enthusiast
Messages
185
Location
Lichfield
#8
Hi Edwin,
Will pick up some and message you, there sold singularly so I’ll send 6, you’ll have spares just incase the rocker needs to come off/on.
Best
Ian
Thank you very much. What a great forum this is. Look forward to hearing from you.
 

edwin

Enthusiast
Messages
185
Location
Lichfield
#9
The measurement I was talking about is the diameter of the hole in the center which would fit over the stud
I understand now. But I could drill that to 7mm from a 6mm. I will have another look at what I have got. Thanks for your advice.
 
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