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dclewallen
02-24-2007, 05:30 PM
I won't have access to my shop manual for awhile and need to know the torque specs for the flywheel nuts on my 289 also do these require lock washers? The length does look long enough. Are the original nuts thinner? I've replaced them with grade 8 nuts. Thanks,

Darryl C. Lewallen Clarkesville, Ga.

N8N
02-24-2007, 06:49 PM
I think they came with lock nuts but on my car I used grade 8 flat washers and blue loctite because I am using an aluminum flywheel. I don't think lock washers really do much of anything so even with iron I would probably go that route.

To answer your question, FSM says pressure plate to flywheel 13 to 15 ft-lbs and flywheel to crank 33 to 35 ft-lbs. I think when I put my engine together I put a little "extra" on those specs as I was using all Grade 8 hardware and I wanted to make sure they didn't relax. I made my own crank bolts by grinding one flat off of standard Grade 8 bolts. they were a couple 64ths longer than stock but that didn't appear to be a major issue - no interference with clutch disc.

good luck

nate

--
55 Commander Starlight
http://members.cox.net/njnagel

Transtar60
02-24-2007, 09:17 PM
They use a 3/8" lock washer. IIRC they are the multiple tooth external non split type.(Have no idea what the technical name for them is).


http://racingstudebakers.com/coppermine/albums/userpics/10056/5E13%20Pic%203.JPG
3E38
4E2
4E28
5E13
7E7
8E7
8E12
8E28
4E2
59 Lark
etc

StudeRich
02-25-2007, 12:09 AM
Darryl; be carefull here! It sounds to me like you have the Auto. Trans bolts in the crankshaft. If you cannot put a thick nut and a split type lockwasher on them, they are the wrong bolts.

Do you remember all those posts on this subject where Mr. Biggs is warning us to get these right, before putting the rear main cap on and the oil pan? This is what he was talking about.

Automatics get (6) 534587 27/32" X 3/8" X 24 (NF) bolts,(6) G120382 lockwashers and (6) G120369 3/8" X24 Nuts.


Standard Trans. cars get (6) 534532 1 13/64" X 3/8" X 24 (NF) fine bolts, (6) of the same lockwasher and (6) G120369 Nut.


quote:The length does look long enough. Are the original nuts thinner? I've replaced them with grade 8 nuts. Thanks,Darryl C. Lewallen

StudeRich
Studebakers Northwest
Ferndale, WA

dclewallen
02-25-2007, 10:52 AM
The bolts I have are the stock ones for the 3-speed overdrive trans that came in my 53. I was going to use the split type lock washers which are thicker than the ones Transtar60 spoke of. That may be the problem.

Darryl C. Lewallen Clarkesville, Ga.

N8N
02-25-2007, 01:04 PM
The late parts book shows just a 3/8" lock washer - but I think the toothed washer you are talking about is called a "shakeproof" washer.

nate

--
55 Commander Starlight
http://members.cox.net/njnagel

N8N
02-25-2007, 01:05 PM
BTW I used 1-1/4" bolts on my car; they don't appear to be an issue; but maybe the Fidanza aluminum flywheel is slightly thicker than stock.

nate

--
55 Commander Starlight
http://members.cox.net/njnagel

Roscomacaw
02-25-2007, 03:20 PM
Having just transferred flywheels from Pete's old engine to the new one, I confess I used only the self-locking nuts that are original. And strictly speaking, the special, odd-headed (factory) bolts were about 3/32nds shorter than what the parts book specifies. Both the one's I've been driving on for 17 years AND the ones in the "new" engine.
Like I said, only the self-locking nuts were employed and these JUST manage to completely grip the bolt. That is to say, there's maybe ONE honest thread protruding past the crown of the nut. Since they're self-locking nuts (and they still had GOOD bite to their crimped ends!), I'd rather have the nut fully on the shank than worry about a lock-washer. Lock-tite might have been a nice touch - I didn't bother.[:I] I'm hoping for another 17 years of service.;)

Miscreant adrift in
the BerStuda Triangle
http://images.andale.com/f2/115/106/906179/2006/12/7/truckonhill3.jpg

1957 Transtar 1/2ton
1960 Larkvertible V8
1958 Provincial wagon
1953 Commander coupe

StudeRich
02-25-2007, 03:47 PM
N8; you and Transtar60 can talk about the inside star lockwashers (shakefroof) (flat) whatever, all you want, BUT, they were used on Exhaust Manifold Bolts with the very thick flat washers! Thats where you have seen them! They never went on Crankshaft bolts at the factory, so maybe someone over the years put them on your cars!

StudeRich
Studebakers Northwest
Ferndale, WA