73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: Bitzer! on January 25, 2012, 02:53:28 pm

Title: thread size
Post by: Bitzer! on January 25, 2012, 02:53:28 pm

Hi guys, I've popped up here now!

Starter problem sorted, exh headers fitted and pipes mocked up in position, a few tweaks needed but good enough for now.

I was to dispose of the ugly viscous fan and I'll run a 'lecky one (as Viles but prob not as pretty!)

Here's where I've got to: Fan etc off, studs removed from water pump drive. The question now is what size thread do I need to bolt the pulley back on?

It tends to be specialist places over here that deal with imperial now, the "normal" routes only deal in metric! It's easy to ask direct for what I need rather than explain to a do-nut that hasn't a clue.

Any one shed any light?

cheers

Andy

Title: Re: thread size
Post by: thirsty on January 25, 2012, 03:38:48 pm

5/16x24 NF by however long you need them Andy.
Don't forget to get some new lock washers with them too so they don't loosen up on you.

Title: Re: thread size
Post by: Bitzer! on January 25, 2012, 03:45:18 pm

Cheers me old china!

Sorry - translation > Why thank you for your help young man

 ;D

Title: Re: thread size
Post by: thirsty on January 25, 2012, 07:50:25 pm

Before you take my word for it Bitzer, I just remembered that you have a big block and the water pump I checked was on a small block. I'm not 100% sure they are the same thread size.
Hopefully someone else that has a big block can check. Sorry if I gave you wrong info.

Title: Re: thread size
Post by: zieg85 on January 25, 2012, 08:41:07 pm

yep it is the same

Title: Re: thread size
Post by: VileZambonie on January 25, 2012, 09:18:11 pm

use flat washers and loctite instead.

Title: Re: thread size
Post by: jaredts on January 25, 2012, 10:12:59 pm

Do some research on lockwashers.  They are only effective in a few circumstances where only a very small torque can be applied.  They are otherwise counterproductive.  Cryin' shame that so many engineers still spec. these out for anything but plastic or thin sheet metal.

Title: Re: thread size
Post by: Bitzer! on January 26, 2012, 06:22:48 am

As always, cheers all.

Parts ordered and will be here 2mow.

That's another bit done!!