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-   -   Restoring Rusty (https://67-72chevytrucks.com/vboard/showthread.php?t=645440)

rich weyand 11-12-2015 01:56 AM

Re: Restoring Rusty
 
The important thing with a gas tank is that it should not be "empty". As long as a little bit of wet gasoline is present in the tank, the vapors in the tank will be too rich to allow an explosion.

I've actually watched a guy weld on a gas tank with gas in it. A bit unnerving, that.

Another option is to empty the gas and fill it all the way with water to force the gas vapor out. You can then empty the water out. Any little bit of water left will be taken up by the alcohol in modern gasoline.

The water thing was my preferred method when working on motorcycle tanks. I have wire-wheeled on a fuel tank with gas in it, though, repairing a crack in a gas tank on the car with -- you guessed it -- JB Weld. I needed to get a clean surface for the patch, so I wire-wheeled the area around the crack, which of course was open to the inside. Wet gas in the tank, though, so too rich for ignition.

rich weyand 11-12-2015 02:04 AM

Re: Restoring Rusty
 
Quote:

Originally Posted by enaberif (Post 7373205)
Grade 5 is perfectly fine but I would not use grade 2 at all.

I had to use a bunch of grade 5 on mine because trying to find a place open on the weekends that stock the appropriate quantities of grade 8 was impossible.

If you can use grade 8 do so.. if all you can find is grade 5 it will be ok as long as EVERYTHING is grade 5.

And yes you can wirewheel the tank if you want without blowing anything up.

Agreed, use matching hardware. Grade 5 is enough. Those little 3/8" rivets did the job for how long? And they were how hard to get off?

The big thing is torquing them to correct spec. Grade 5 3/8-16 is 30 ftlb. Grade 5 3/8-24 is 35 ftlb. The Grade 8 numbers are 45 and 50 ftlb. (Those are dry numbers. Do not lube the threads when you install them.) If you seriously under-torque or over-torque them, they will ultimately fail.

Gregski 11-12-2015 03:23 AM

Re: Restoring Rusty
 
Quote:

Originally Posted by rich weyand (Post 7353225)
I would probably do it in black wrinkle paint. Kill the glare as well as the windshield reflection. The Rustoleum stuff isn't too expensive. The thing about Rustoleum is that it dries slow, to produce a more flexible coating. This doesn't micro-crack and let moisture and oxygen in to start rusting. For a dash, which can get very hot in the sun, I think the Rustoleum product is probably the way to go.
http://www.zoro.com/rust-oleum-wrink...Q&gclsrc=aw.ds

Thanks Rich I just placed the order.

Gregski 11-14-2015 07:08 PM

Re: Restoring Rusty
 
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after allowing 2 or 3 days for the POR15 to dry on the frame it was time to mount the new leaf spring hangers, they did come with hardware

Gregski 11-14-2015 07:10 PM

Re: Restoring Rusty
 
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here is the driver side all bolted up, I went 30 foot pounds on these grade 5 bolts

holding the nuts down inside the frame channel while you torque these down is a bit of a pain since there are rivets and the cross member bracket in the way

Gregski 11-14-2015 07:12 PM

Re: Restoring Rusty
 
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then it was on to the passenger side

Gregski 11-14-2015 07:14 PM

Re: Restoring Rusty
 
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and then we ran into a snag, we are about an inch too far back, the rear axle needs to come an inch forward for the leaf spring holes to align with the holes in the hangers

jacking up the axle would bring one side within 1/2 and inch off but no where close to getting both bolts, one on each side in

Gregski 11-14-2015 07:16 PM

Re: Restoring Rusty
 
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we tried all sorts of tricks, wood wedges, removing the leafs from the rear shackles, removing the shocks, nada

Gregski 11-14-2015 07:17 PM

Re: Restoring Rusty
 
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finally I popped out the drive shaft from the diff and was able to get the rear end mounted, minus the drive shaft of course

Gregski 11-14-2015 07:20 PM

Re: Restoring Rusty
 
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this is how much off we are

So what now? Do I need to get the drive shaft shortened? I thought this two piece shaft should have some wiggle room and be able to go in and out, I know it don't go in and out of the Muncie SM465 transmission so where does it telescope at? Or does it?


enaberif 11-14-2015 07:28 PM

Re: Restoring Rusty
 
What does the other end of the drive shaft look like? The part attaching to the rear end never does but the front side should.

Gregski 11-14-2015 07:37 PM

Re: Restoring Rusty
 
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Quote:

Originally Posted by enaberif (Post 7376327)
What does the other end of the drive shaft look like? The part attaching to the rear end never does but the front side should.

here's the middle part, I think the manual shows that this is where there may be some slideability

Gregski 11-14-2015 07:40 PM

Re: Restoring Rusty
 
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Quote:

Originally Posted by enaberif (Post 7376327)
What does the other end of the drive shaft look like? The part attaching to the rear end never does but the front side should.

and here's a picture from a while ago when I had it off the truck, and before I painted it

enaberif 11-14-2015 07:43 PM

Re: Restoring Rusty
 
What an ugly contraption! I'm not to familiar with how 2 piece shafts work :\

But I would think where you think should be movement it can move. It may just be stubborn.

UKNOWME 11-14-2015 08:04 PM

Re: Restoring Rusty
 
Put it down on the ground and check it again.

rich weyand 11-14-2015 09:00 PM

Re: Restoring Rusty
 
The paint may be keeping it from telescoping, or you may already be in all the way.

Lowering or raising a a vehicle often requires playing with driveshaft length, since the driveshaft often angles down to the diff. Raising the diff (lowering the vehicle) shortens the required driveshaft length.

Gregski 11-14-2015 09:06 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by UKNOWME (Post 7376363)
Put it down on the ground and check it again.

Thanks, good tip, I tried just that and now I think it's only 1/2 inch too long.

Gregski 11-14-2015 09:08 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by rich weyand (Post 7376420)
The paint may be keeping it from telescoping, or you may already be in all the way.

Hi Rich, I think that thing wouldn't move even before I painted it, I should have addressed that issue/concern back then, but I decided to ignore it, and now it's bitten me, as always, anywho never time to do it right, but always time to do it over!

I will be pulling the driveshaft out and examining it closely off the truck, wish me luck. I think it should come apart with force, I don't think there is anything holding it preventing it from being pulled out all the way.

enaberif 11-14-2015 09:21 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by Gregski (Post 7376432)
Hi Rich, I think that thing wouldn't move even before I painted it, I should have addressed that issue/concern back then, but I decided to ignore it, and now it's bitten me, as always, anywho never time to do it right, but always time to do it over!

I will be pulling the driveshaft out and examining it closely off the truck, wish me luck. I think it should come apart with force, I don't think there is anything holding it preventing it from being pulled out all the way.

Take a look at this.. You can see how can separate.

http://repairguide.autozone.com/znet...528003dc2e.gif

Gregski 11-14-2015 11:06 PM

Re: Restoring Rusty
 
2 Attachment(s)
Quote:

Originally Posted by enaberif (Post 7376449)
Take a look at this.. You can see how can separate.

http://repairguide.autozone.com/znet...528003dc2e.gif

Thanks bud, here's what it looks like in the '74 Manual, but the how to git it apart could use some more words, ha ha

CENTER SUPPORT BEARING

1. Remove dust shield.
2. Remove strap retaining rubber cushion from bearing support.
3. Pull support bracket from rubber cushion and pull cushion from bearing.
4. Pull bearing assembly from shaft.
5. Assemble bearing support as follows:
a. Install inner deflector on propeller shaft, if removed, and prick punch deflector at two opposite points to make sure it is tight on shaft.
b. Fill space between inner dust shield and bearing with lithium soap grease.
c. Start bearing and slinger assembly straight on shaft journal. Support propeller shaft and, using suitable length of pipe over splined end of shaft, press bearing and inner slinger against shoulder on shaft.
d. Install dust shield over shaft, small diameter first and press into position against outer slinger.
e. Install rubber cushion onto bearing.
f. Install bracket onto cushion.

Jeramy 11-14-2015 11:09 PM

Re: Restoring Rusty
 
unscrew the grease seal off the end of yoke and then pull. lot easier to pull apart with front shaft and carrier bearing still mounted in truck.

enaberif 11-14-2015 11:10 PM

Re: Restoring Rusty
 
Well that is interesting because from that picture there is no way that would move because it uses a roller bearing which looks like it would be a press fit onto the carrier bearing shaft.

Gregski 11-14-2015 11:19 PM

Re: Restoring Rusty
 
1 Attachment(s)
Quote:

Originally Posted by Jeramy (Post 7376575)
unscrew the grease seal off the end of yoke and then pull. lot easier to pull apart with front shaft and carrier bearing still mounted in truck.

Thans Jeramy I like the idea of leaving half of it in the truck, might be less work. Are you thinking this piece with the arrow pointing to it?

Gregski 11-14-2015 11:20 PM

Re: Restoring Rusty
 
2 Attachment(s)
Quote:

Originally Posted by enaberif (Post 7376576)
Well that is interesting because from that picture there is no way that would move because it uses a roller bearing which looks like it would be a press fit onto the carrier bearing shaft.

here are two pics stacked on top of each other in the same direction to give us a conceptual of what is going on up in there

Jeramy 11-15-2015 12:12 AM

Re: Restoring Rusty
 
yes part with red arrow


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