1963 WP Pulley - need info

[Jeff A.]

Does anyone have a picture of a 1963 340hp waterpump pulley?

Replaced my water pump and now my belts don't line up.
The old pump was an aftermarket - I replaced with an original.

That reinforcement/spacer would likely be all I need, but - the front of the pulley will not allow the 3.25" OD GM spacer to fit down inside.

Maybe the spacer I found is wrong, or maybe the pulley was changed?

[Michael H.]

Re: 1963 WP Pulley - need info

Does anyone have a picture of a 1963 340hp waterpump pulley?

Replaced my water pump and now my belts don't line up.
The old pump was an aftermarket - I replaced with an original.

That reinforcement/spacer would likely be all I need, but - the front of the pulley will not allow the 3.25" OD GM spacer to fit down inside.

Maybe the spacer I found is wrong, or maybe the pulley was changed?

Jeff,

You may have to reposition the hub on the water pump. It's not uncommon for rebuilders to install/position the hub incorrectly.
This operation will require a puller.

[Jeff A.]

Re: 1963 WP Pulley - need info

Yes- I know that - but the easiest way is to use a spacer.
I really don't want to take off the water pump again (don't ask)
Does this look like the right pulley?

[Wayne M.]

Re: 1963 WP Pulley - need info

Does anyone have a picture of a 1963 340hp waterpump pulley? ....

Here's the 3770245 pulley 7_1/8" dia. off a '64 VIN 086xx. I assume it's the same for L76 in model years '63-5 (w/o C60). Also this one had a 3_1/4" dia. spacer (backside pic) although I don't think the AIM calls for one (at least in '65). The pump is a 3859326, but not the original one.

Third pic I took 3 days ago; just threw it in to show what we have to contend with in our neighborhood .

[Sam K.]

Re: 1963 WP Pulley - need info

Wayne: I assume those "four hoofers" are in training, before they harness up the sled for the "Big Fella in Red" !!!!

[Jeff A.]

Re: 1963 WP Pulley - need info

Thanks guys.
Well - That spacer really did not look like it was going to fit under the pulley.
But after I got the pulley off AGAIN it fit just right.
Now all my belts line up again.

Going to put the top down and go for a ride.
It is in the 80's here.

[Stuart F.]

Re: 1963 WP Pulley - need info

Jeff;

What is your build date? Reason I ask is that I see you have the hex head valve cover screws which I know mine had originally (I still have them plus new ones), but I have been using the phillips head screws as I like using my big screwdriver to loosen/tighten with rather than a socket. Mine was a Juy 9 (Tuesday am) build s/n 19147. I went through the pulley issue too many years ago. How is your AFB running? Had all kinds of grief with mine here in Florida with fuel percolation. Finally got it resolved after many tests and experiments over this past summer.

Stu Fox

[Jeff A.]

Re: 1963 WP Pulley - need info

Mine is a July car also -
So yes - I really should be using the phillips screws - or am I? - I have those set aside.
I just did not like the way they looked - too plain.

Also I am going to switch the fuel filter this week to that new black gf90 repro unit now available.

And yes - The AFB gives me a little trouble from time to time.
Right now is not one of those times. -- so shhh

[Michael H.]

Re: 1963 WP Pulley - need info

Mine is a July car also -
So yes - I really should be using the phillips screws - or am I? - I have those set aside.
I just did not like the way they looked - too plain.

Jeff and Stu..

I have a question since you both have July cars. On the rear control arm front pivot bolt and nut... is the nut a castle nut with a cotter pin or just a plain nut?

I'm trying to pin down the point in production that the castle nut and cotter pin first appeared. Thanks.

[Stuart F.]

Re: 1963 WP Pulley - need info

Michael;

I'll have to get back to you later today on that. I just went out to the garage thinking I could just take a peek under the car w/o jacking it up, but Nooo! I got to go to see one of my Doctaries this morning so I'm already dressed to please. Soon as I get back, I'll don my grimmies and take a look.

Later;

Stu Fox

[Stuart F.]

Re: 1963 WP Pulley - need info

Jeff;

You might want to double check the effective date for the valve cover screw change. My originals were hex, and I seem to recall in Noland Adams book it indicated a change before July, but I may be mistaken. My original valve covers were also blown off in a crankcase explosion so it's possible the screws got mixed up then.

I noticed your filter as well, but didn't comment about it being silver as I guess they are both acceptable. There was a thread not too long ago about the repro black ones; comparing the lettering size/type and the hex fittings with the originals - noting judges are more conscious of the correctness (lack of) of the black repros. The silvers are well known to be the replacements. I have one here in a box also in case I need it, but use a correct black one on the car that I got long ago.

Stu Fox

[Michael H.]

Re: 1963 WP Pulley - need info

Michael;

I'll have to get back to you later today on that. I just went out to the garage thinking I could just take a peek under the car w/o jacking it up, but Nooo! I got to go to see one of my Doctaries this morning so I'm already dressed to please. Soon as I get back, I'll don my grimmies and take a look.

Later;

Stu Fox

Thanks Stu. Shouldn't have to jack it up though. I can see the nut easily on my car without any problem.
Here's the nut and bolt on a 19,xxx car. No castle/slotted nut or cotter pin.

[Stuart F.]

Re: 1963 WP Pulley - need info

Michael;

Sorry Buddy. You are so right. I have a heavy flannel cover on the car that hangs nearly to the floor, so I thought I could just peek under it forgetting that one must look through the wheel well. Mine looks just like your picture, even to the amount of blacking/goo on it. The nut is plain, but deep. Bolt threads appear to be fine. Again; mine is 19,147.

Stu Fox

[Michael H.]

Re: 1963 WP Pulley - need info

Michael;

Sorry Buddy. You are so right. I have a heavy flannel cover on the car that hangs nearly to the floor, so I thought I could just peek under it forgetting that one must look through the wheel well. Mine looks just like your picture, even to the amount of blacking/goo on it. The nut is plain, but deep. Bolt threads appear to be fine. Again; mine is 19,147.

Stu Fox

Thanks Stu. That's exactly what I thought it would be.

I wonder when the change to the slotted nut/cotter pin style actually did occur on the assy line? Obviously, it was at least four months after the March date in the assembly manual.