Joined: Aug 2017 Posts: 627 Threads: 19
Reputation:
11
Location: Sheffield South Yorks
Car type: 1932 RN saloon
Having recently checked the original crankshaft in our family heirloom RN saloon and found a crack in it, I am curious to know how many of us are still using the Austin crank. Before replacement cranks were marketed there was no choice and I and everyone else must have done many thousands of miles without thinking of crank failure at that time.
Cheers,
Dave.
Joined: Aug 2017 Posts: 1,337 Threads: 34
Reputation:
30
Location: Cheshire
Car type: Race Ulster, 1926 Special, 1927 Chummy, 1930 Box
3 cars with new crank, one without. The without one doesn’t get used much. Seems to me if you are rebuilding an engine it makes sense to have a new crank, but I don’t think I’d strip my engine just to replace one that’s otherwise ok.
Alan Fairless
Joined: Aug 2017 Posts: 964 Threads: 117
Reputation:
3
Location: Melton Mowbray.
'25 Chummy original 1/8" crank.
'28 Chummy replacement 1 5/16" Austin crank.
'28 saloon 1 5/16" Barlow crank.
'33 Type 65 original 1 1/2 " crank...and rods.
'34 Speedex no idea!!
Joined: Aug 2017 Posts: 3,000 Threads: 168
Reputation:
37
Location: Sherwood Forest
Car type: 1938 Talbot Ten Airline
04-05-2020, 09:27 AM
(This post was last modified: 04-05-2020, 09:29 AM by Mike Costigan.)
My 1931 RM is running on it's original 1 5/16" crank and rods ... and yes, I'm very conscious of it's potential vulnerability! I keep telling myself since it was off the road from 1960 to 2012, it's probably seen less use than those I was running on in the 1960s ...
Joined: Jan 2019 Posts: 1,564 Threads: 20
Reputation:
14
Location: Bala North Wales
Car type: 1933 RP Standard Saloon
My RP is running on its original crank. Having seen 100,000 miles come up, I have reason to believe that the car has done 102K miles genuine. No funny noises so far but I do have a spare crank and rods (also Austin).
Joined: Aug 2017 Posts: 77 Threads: 7
Reputation:
1
Location: West Australia
Car type: Arrow Competition 75
Original 1 1/2 pressure fed crank in my Arrow. Passed a visual inspection when I rebuilt the engine 10 years ago, (0 Miles ago). In retrospect should have done more at the time
Joined: Aug 2017 Posts: 3,379 Threads: 105
Reputation:
28
Location: Darkest Bedfordshire
Both my cars run on Reliant cranks. Last A7 crank I had punched a hole through the crankcase on the M5, in those days I had a dad I could call to come and rescue me!
Joined: Jul 2019 Posts: 187 Threads: 42
Reputation:
5
Location: North Wales UK
Car type: Austin 7 RN 1931
Hi Dave
You've worried me to death now, I've got a 31 RN which, as far as I know, is still using the original engine internals.
Next winters project was an engine rebuild, hope it lasts that long.
There seems to be two schools of thought that cause crank failure. One is over revving and the other not revving enough !, probably both are correct
Buy an Austin 7 they said, It's easy to work on they said !
Joined: Aug 2017 Posts: 5 Threads: 0
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0
Hi, I've just rebuilt my spare engine with a second hand 3 bearing crank but not currently running A7 crank.