Distribator off by one tooth - Pulley casting number
 

What application, Ford or Mercury, would this pulley, with the casting number B 16, be for?

Re: Pulley casting number
 

"B 16" looks more like a date code than a casting number to me. I'll take a SWAG and say narrow belt 8BA.

Re: Pulley casting number
 

I'm holding a '53 Merc pulley right now that looks same as yours. 3/8" belts, closest sheave to rear of engine 6 1/8" dia. and smaller is 5 1/4". Center of large sheave is 2.0" from rear of hub,smaller is 3/4" forward of that.


No numbers at all on mine.


Terry

Re: Pulley casting number
 

I have an 8BA pulley that looks similar to that shown except it has 3 reinforcing webs on the backside. One web is on each spoke. Both are narrow belt pulleys. Large pulley is 6 in. dia. Smaller pulley is 5 and 1/4. Each measurement was taken at front of each sheave. Crank hole is a tiny bit less than 1 5/16.

Re: Pulley casting number
 

On mine the closest sheave to rear of engine 6 1/8" dia. too. I am not finding Ford and Mercury pulleys with part number cast in to them.

If you draw a line directly up from the keyway to the top of the pulley, the timing "button" appears top be 1" to the right of the top of the line.

19F0rdy & cadillac512: Is that the same on yours?

Re: Pulley casting number
 

I had previously posted a version of this ('50-'51) pulley on your first inquiry.

I can't see where other than an 8RT or 6cyl pulley there would be any functional difference in '50-'53 Ford or Mercury.
https://www.fordbarn.com/forum/attac...3&d=1580138009

Re: Pulley casting number
 

Yes, same as mine.



Terry

Re: Pulley casting number
 

Thank you, I appreciate your input, as I continue to look for an anomaly that might offer an explanation.

Re: Pulley casting number
 

Which pulley are we working with? You said you replaced a 2belt with a 3belt. Which one are you having the timing dot problem with?

You are showing us the 2belt.

If it's the 3belt on the car, remove, inspect and measure that one.

Re: Pulley casting number
 

I suspect that the distributor is not correctly aligned with the drive gear.
With the #1 piston top dead center and pointer on the dot.
The rotor should be in line with the #1 position on the dist.cap
If it is not then pull out the dist. far enough to rotate to the next gear location that will put the rotor closest to the correct position on the cap when touching the clamp pad, then lock in place.

Disregard any previously installed markings on the clamp pad.
From this point the timing should be able to be set.

Re: Pulley casting number
 

Here's some photos showing my 8BA pulley agrees with your pulley re: 1 inch measurement. If there were any casting marks or part # I think they may have been drilled out during balancing process. I couldn't find any ID marks on the pulley. It is a casting.

Re: Pulley casting number
 

"I suspect that the distributor is not correctly aligned with the drive gear.
With the #1 piston top dead center and pointer on the dot."

51 Merc, he established TDC using the cable tie method. When the piston is at TDC the pointer does not point to the dot.

That's the problem.

It has nothing to do with the distributor or the ignition timing. That dot is never going to be TDC.

How many times per crankshaft revolution does a spark occur? ... for a V8? ... for a 6? How many degrees apart for the V8? How many for the 6?

Inspect the slot ... measure the dot. (On the one with the problem.) Then go from there.

Re: Pulley casting number
 

I was only able to confirm the TDC with the finger test. Finger in the plug hole and turn over the engine until it blows the finger out of the hole. Then line up the dot with the pointer. Cap on the distributor, pointer to #1 plug, pointer showing rotor position with cap off. I think this will confirm the one tooth off explanation. Looks like rotate one tooth counterclockwise?

Re: Pulley casting number
 

From your earlier post after suggestions that you use the cable tie method, you posted #31:

"Ok folks, I have to admit putting a foreign object into the cylinder, of a perfectly good engine would have not been my first choice. But here it is. Bottom line, the new TDC, is still 1 1/2" off the original pulley marker."


Now you admit:

"I was only able to confirm the TDC with the finger test. Finger in the plug hole and turn over the engine until it blows the finger out of the hole. Then line up the dot with the pointer."

Nice work confusing us.

Re: Pulley casting number
 

With the pointer and dimple lined up, this is appox. where the rotor should be located. And it does appear that the rotor should be relocated.
https://www.fordbarn.com/forum/attac...9&d=1580157538

Re: Pulley casting number
 

This is what one tooth, counter clockwise, looks like:

Re: Pulley casting number
 

Looks OK, now rotate the distributor (CCW) to bring the rotor to where it will be in alignment with the cap #1 position. lock it down and start it up.
Should be good to go for timing adjustment.

Re: Pulley casting number
 

Just a thought. You might want to consider replacing the
distributor hold down bolt with a stud to save wear and tear on the threads.

Re: Pulley casting number
 

Thanks for the suggestion, but once I get this right, believe me, I have no intention of touching it again!

Re: Pulley casting number
 

Don't worry. After this learning lesson you will be an expert on installing and setting your distributor. Now, you can remove it and reinstall it again without anxiety. Good job.