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MG MGA - Whitworth spanners needed on for MGA
|Changing my oil recently made me realise there should be a list of what Whitworth spanners are required for working on an MGA (maybe Barney can add a full list to his site).|
A few I have found are,
engine sump drain plug - 3/8 Whit. (18 mm will fit)
Flexible fuel line swivel nuts - 5/16 Whit (15 mm will fit)
Float chamber centre bolt - 1/4 Whit
Choke and throttle cable clamps - 3/16 Whit
Link nuts connecting levers on carbies - 1/8 Whit
Banjo bolt float chamber - 7/16 Whit
are there some others, what about where Posi drive screws are used also?
|The starter switch also appears to have WW nuts on the terminals|
The link nuts can be adjusted using an AF socket - at least I always used one without any probs.
The clamps for the cables are also AF on my carbs
|The most important Whitworth spanner/socket is the rear axle nut - something like 1-51/53", can't remember the exact size but their rare and expensive to buy. Someone once said that they are either extremely tight or slack and I'd be interested in checking mine if I could get hold of a socket. What about the UK owners contributing to a shared 'rare tool resource'?|
|J H Cole|
|Not sure if it is Whitworth, but the nut is 1-61/64". The important thing about it is that it is octagonal, not hex like most other nuts.|
|Barney has a page about sources for the hub nut socket. http://www.mgaguru.com/mgtech/tools/hub_socket.htm|
I got one of the sockets for a Ford 4x4 from a local auto parts store, and it worked fine.
|If you measure the 1-61/64" octagonal rear hub nut socket, you will find that it is coincidentally very close to 50mm.|
|Some current dirt bikes use a 50mm octagon cap on the forks. This wrench is available, but don't know if it is hefty enough. http://www.motionpro.com/motorcycle/partno/08-0236/ Haven't seen a 50mm octagon socket.|
Best bet still seems to be the 4x4 hub socket. I got mine several years ago for less than $10.
|Jeff is right. Go to a Checker/ Schucks/Kragan or Auto-Zone and rent (often free with a deposit) the 4x4 front wheel hub socket set (set of 4 or 5). There's one socket in the set that fits nicely to the MGA rear hub nut. The socket that Moss sells (a pressed tube) is a piece of junk.|
|The drain valve in the side of the engine block is a whitworth. I don't have any whitworth wrenches yet, but a thin 15mm wrench will just barely work.|
|Then there's the drain valve on radiator...|
|The link nuts on the carburetors are all 2BA (the british equivalent of American machine screws). The nut on the starter power stud is 1/4W. For a chart comparing the across the flats measurements of wrenches (American, British and Metric), go to: http://www.mgexperience.net/article/wrench-socket-reference.html|
This will show what wrenches can be substituted for most Whitworth or BSF fasteners (BSF fasteners use a Whitworth wrench, one size smaller i.e. a 1/4W wrench fits the head of a 5/16 BSF bolts).
There is a companion chart of standard threads (American, British and Metric) at: http://www.mgexperience.net/article/thread-reference.html
Cheers - Dave
|The nut connecting the "casing, motor to wheelbox" to the windshield wiper motor is also Whitworth, at least on the 1500.|
|In answer to the original question, my MGA has 360,000 miles on the clock, I do all my own maintenance (including complete restoration), and I do not own any Whitworth spanner. Some of the fasteners may be Whitworth, but I always find a useful wrench among the inch sizes (and a couple of adjustable spanners).|
|The banjo bolts for the hydraulics are Whitworth thou I do not recall the sizes.|
|Dave De Fauw|
This thread was discussed between 15/07/2007 and 27/07/2007
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