How is the engine cover attached?

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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schrottschlecker
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How is the engine cover attached?

Post by schrottschlecker »

Hello,

in my basketcase parts box, I found a metal that looks like the engine cover which sits on the engine plates. It has a metal half-circle-ring soldered on the inside. It might be a hand-made one, but I would like to know how the original cover is attached. Any idea or photo?

Thanks a lot,

Christian
outside.jpg
inside.jpg
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cbranni
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Re: How is the engine cover attached?

Post by cbranni »

Hi Christian

See the slot in the engine plate in your first photo directly above the left side of the slot there is detent in the plate, the original covers have deeper sides than yours and have a location tit either side which locates in the detent.

"tit" is an engineering term for a raised locating dimple or protrusion.

I can't find a photo at the moment.

Colin

PS In your third photo you can clearly see the detent, a blind hole
only dead fish go with the flow
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Duncan
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Re: How is the engine cover attached?

Post by Duncan »

Hi Christian

This is a picture of a replica one from the spares scheme http://www.amoc-parts.com/store/comersu ... duct=21481

If originalty does not matter you should still be able to use yours, it looks like a stud through the engine plates would engage with the washer providing it is firmley affixed, it may require a grommet to make up the difference in hole size and stop it rattling.
schrottschlecker
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Re: How is the engine cover attached?

Post by schrottschlecker »

Thanks for your answers.
First, I will try to get a good attachment of the part that I have. It is nicely smooth and fits well over the plates.

Christian
Mick D
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Re: How is the engine cover attached?

Post by Mick D »

Hi

I'd be tempted to use some sort of elastic band through the washer and attached below at some convenient point, it's more easily accessible than a bolt through the engine plates and would keep the cover under tension.

Regards Mick
schrottschlecker
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Re: How is the engine cover attached?

Post by schrottschlecker »

Yes, that could work or even a metal spring.
leswaller
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Re: How is the engine cover attached?

Post by leswaller »

A small dab of silicone sealer on the side tabs will stop the cover going walkabouts and is invisible, but it is still easy to get the cover off.
Les
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George Kaplan
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Re: How is the engine cover attached?

Post by George Kaplan »

cbranni wrote:
"tit" is an engineering term for a raised locating dimple or protrusion.
Hmm. I have always thought of it as more of a slang engineering term than an official one.

You could try googling the term but I fear that the results wont help with your bike rebuild. :shock: :D

John
cbranni
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Re: How is the engine cover attached?

Post by cbranni »

Hi John,

Lots of slang terms in tool making :D :D :D

Colin
only dead fish go with the flow
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Expat
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Re: How is the engine cover attached?

Post by Expat »

As the actress said to the bishop ;)

:rofl: :rofl:
Keep shiny side up.

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