Author Topic: Mystery screws ?  (Read 212 times)

Offline pato08

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Mystery screws ?
« on: 31.01. 2019 00:48 »
Just going through a dry engine build after receiving all new bolt for the entire engine. ( engine was in pieces and no nut or bolts supplied), My question is are there two screws or bolts going through the inner timing cover to engine cases. a per the photo's. there is nothing noted in the parts book ?
1957 Plunger, one of the very rare collector's items ;-)
Australia

Online Brian

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Re: Mystery screws ?
« Reply #1 on: 31.01. 2019 05:18 »
There should be four screws all up, two go where you show in your pic and another two back by the magneto.

They are no. 50 in the parts book.

Offline MikesClassicCycleSpares

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Re: Mystery screws ?
« Reply #2 on: 31.01. 2019 05:26 »
Brian just beat me as I was trying to get photos!! 4 screws in the recessed holes on the inner timing cover. 2 on each side
Mike's Classic Cycle Spares, Queensland, Australia
https://mikesclassiccyclespares.com/

Offline pato08

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Re: Mystery screws ?
« Reply #3 on: 31.01. 2019 06:07 »
Thank you Brian & Brett, I didn't look at the Magneto end in my parts book, and yes it does show them, silly me.   *conf* *conf*
1957 Plunger, one of the very rare collector's items ;-)
Australia

Offline Swarfcut

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Re: Mystery screws ?
« Reply #4 on: 31.01. 2019 09:05 »
A word of caution......Make sure the blind holes have no old jointing compound and other crap which will bottom the thread before the bolt head can tighten the cover. Easy to remove with a smaller drill bit or even a woodscrew.  Clean the thread with a plug tap. Worth checking all the new bolts for length, making sure they don't bottom. Pattern parts...always check.

 But you knew this already.

 Swarfy.

Offline pato08

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Re: Mystery screws ?
« Reply #5 on: 31.01. 2019 21:40 »
I did a quick clean and re- tap of threads, but I still need to blast clean cases prior to final assembly. All input gratefully accepted  *smile* *smile*
1957 Plunger, one of the very rare collector's items ;-)
Australia

Online chaterlea25

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Re: Mystery screws ?
« Reply #6 on: 31.01. 2019 23:42 »
Hi Pat,
Be very careful when blasting the BSA cases  *warn*
It is almost impossible to clean out the oil way from the PRV to the cam trough, this also has a tiny bleed hole to the timing gears if media gets in there

John
1961 Super Rocket
1963 RGS (ongoing)