<VV> Fuel Leak / lug nuts

[Hugo Miller]

That makes sense. Still sounds perilously small diameter to me, but I'm not 
going to argue with GM. I intrigued as to why a 3/8" UNF bolt in the UK 
becomes a 3/8" x 24 in the US. Same with tires - minimum tread depth is 
4/32" in the US. In England we call that 1/8". As Churchill said, we are two 
peoples divided by a common language  ;-)



-----Original Message----- 
From: Charles Sadek
Sent: Thursday, October 4, 2018 1:51 PM
To: 'Hugo Miller' ; 'Joel McGregor' ; virtualvairs at corvair.org
Subject: RE:  Fuel Leak / lug nuts

Hugo,

That 11/32" is the correct bolt size. Many years ago, I went to the (huge)
machine shop tool crib at work, to borrow a 11/32" tap to chase the threads
in a crankshaft. The guys was a skeptic, too... He was really surprised when
he found one. Racers go to a 3/8" - 24 fine thread-same thread BTW as the
11/32nd. Not for strength, but for reduced clearance in flywheel holes...
Tighten everything up. Theory is, they went to that bolt size for strength
in a crankshaft flange and bolt size was correct for that flange diameter.
Threads? To keep folks from using hardware grade bolts...

Chuck S

-----Original Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of
Hugo Miller via VirtualVairs
Sent: Thursday, October 4, 2018 4:15 AM
To: Joel McGregor; virtualvairs at corvair.org
Subject: Re: <VV> Fuel Leak / lug nuts

Why would they use such an obscure bolt size? I don't think I've ever seen
an 11/32" bolt in my life. Why didn't they just use 3/8"? Is there some
obscure engineering reason for it?
I've never dismantled a Corvair engine, but I do know that GM products
generally keep things as simple as possible. Also that's an extremely small
size, if you're talking about the bolts that hold the flywheel to the crank.



-----Original Message----- 
From: Joel McGregor via VirtualVairs
Sent: Thursday, October 4, 2018 5:00 AM
To: virtualvairs at corvair.org
Subject: Re:  Fuel Leak / lug nuts

Obviously I had switched to bolt head size.  11/32 bolt size - flywheels are
the only thing I think I've ever seen use that.

-----Original Message-----
From: VirtualVairs <virtualvairs-bounces at corvair.org> On Behalf Of Joel
McGregor via VirtualVairs
Sent: Wednesday, October 03, 2018 10:33 PM
To: virtualvairs at corvair.org
Subject: Re: <VV> Fuel Leak / lug nuts

Coils and starter solenoids?  I can't remember but I've used that size in
the last week for sure.

-----Original Message-----
From: Hugo Miller <Hugo at aruncoaches.co.uk>
Sent: Saturday, September 29, 2018 7:59 AM
To: Joel McGregor <joel at joelsplace.com>; virtualvairs at corvair.org
Subject: Re: <VV> Fuel Leak / lug nuts

11/32"? When did you last see one of those!

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