<VV> Fan bolt torque

[Frank DuVal]

I checked. It does say 20-25 ft-lbs. But, I think it is referring to the 
bolts holding the top cover on the block. I can not find my list of shop 
manual corrections, as this torque spec should be in the previous step, 
where the top cover is bolted on. See page 6A-20 section Installation 1. 
and 2. of the 1961 shop manual.

Hmm, really odd spec as the 1965 shop manual calls for 7-13 ft-lbs for 
this spec. But 20-25 in-lbs seems too low for the pulley.

Since these 4 pulley bolts screw into steel, I have always just used the 
one "umph" torque spec when I tighten them with a 1/4"drive ratchet. 
They are 1/4-20 on earlies (with 3/8 heads) so 60 or so in-lbs would be 
typical.

And I can not find the spec in the 1965 manual either, but, that is a 
5/16-18 bolt with 5/16 head IIRC, so the torque spec is higher. I might 
be wrong on the bolt head sizes.

I also never used a torque wrench on a generator. True confessions.

Frank DuVal

On 11/1/2015 7:00 AM, Harry Yarnell (Verizon) via VirtualVairs wrote:
> You sure that doesn't say in-lbs?
> Havn't looked it up, but...
> I've never measured the torque, just my calibrated hand.
> 20-25 ft-lbs is WAY wrong!
>
>
>
> -----Original Message-----
> From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of Randy Hook via VirtualVairs
> Sent: Sunday, November 01, 2015 12:55 AM
> To: virtualvairs at corvair.org
> Subject: <VV> Fan bolt torque
>
>
> What does everyone torque their fan bolts to?  The reason i'm asking is the only 'specs' I could find are from the '61 shop manual.  I'm torqueing a ' 64 fan.  The '64 supplement refers you back to the '61 book.  The problem is that it calls for 20-25 ft lbs  of torque.  If this is correct, imagine my surprise when one of the said bolts twisted off at 20 ft lbs!  Was that bolt the exception to the rule?  I managed to get it out by sawing a slot in what was left of the bottom portion of the bolt and turning it out with a screwdriver.  I decided to torque them at 15 to be safe.  Inquiring minds want to know.
> Also, that's one for your "errors in the shop manuals" paper, Bob.  Plus there is a couple more. The instructions for installing the generator in the '64 supplement are the same as the ones in the ' 61 book.  But the parts are different!
> The '61 book tells you to torque the bolts and nuts to 15-22 ft lbs.  There are no nuts on the '64 setup.  Plus you can't get a torque wrench onto one of the bolts.  And the rear mounting brackets are different.  The '61 one uses 2 bolts, but the '64 only uses one.  The last one is in the '65 shop manual under "blower" replacement.  It says to "torque to specifications".  What specifications?  There are none listed ANYWHERE!
>    
> Randy (Cap'n) Hook
> Hopewell, PA