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Info required...thread size flywheel top cover

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Info required...thread size flywheel top cover
A7novice Offline
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Joined: Sep 2017 Posts: 51 Threads: 19
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#1
21-07-2023, 09:48 PM
Can someone tell me the thread size of the two set screws that hold down the top cover that fits on back end of engine, covering the flywheel/starter ring.
Mine have stripped and I need to helicoil, so need to be certain of thread size used.
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Parazine Offline
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Joined: Aug 2017 Posts: 858 Threads: 47
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Location: North Wiltshire
Car type: 1927 Chummy, 1926 Top Hat 1938 Big Seven 1/2 a Trials Chummy
#2
21-07-2023, 10:56 PM
Thread ID flywheel pit cover (austinsevenfriends.co.uk)
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AustinWood Offline
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Location: Scottish Borders
#3
22-07-2023, 09:00 AM
On our 1929 engine it's 5/16 BSW
Jim
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John Mason Offline
Lifetime lover of car tinkering
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Joined: Dec 2017 Posts: 1,132 Threads: 66
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Location: Nottinghamshire. Robin Hood County
Car type: Austin Ruby Mk1 1935
#4
22-07-2023, 09:32 AM
A good rule of thumb as that if it is soft metal such as alloy or cast then a course thread such as Whitworth is used.

John Mason.
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.
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A7novice Offline
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#5
22-07-2023, 11:31 AM
Many thanjs for replies, most  helpful.  Regards
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dickie65 Offline
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#6
24-07-2023, 11:58 PM
5/16 Whit on 1934 crankcase.
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