Crank pulley issue

[Guillaume69 150]

Here's the deal: I didn't take my engine/tranny out of the car myself. It was done a year ago by the shop who worked on the engine. As I was putting it back in, I realized that the crank pulley was nowhere to be seen. I asked the shop about it and they came up with a 69 Ford single groove 3 bolts pulley (car is w/o PS or A/C, single V-belt) which they supposed was mine. I was kind of relieved until I tried to put it back on yesterday evening: it doesn't fit.

 

 

I checked the part number on it: C9SE-6312-B. That would be a Ford (T-bird?) 429 pulley.

 

 

 

 

 

I went on my usual vendors' websites and I have trouble finding what I believe should mount on my engine. Again, engine is a 351W with a 3 bolts crankshaft, no P/S, no A/C. Part number C9OE-6312-E seems ok but has 2 grooves.

 

 

 

 

Aftermarket products (such as march Performance) look good, but I am concerned about messing with outside diameter (under drive/ over drive) as well as getting the wrong depth.

 

Anybody with a similar set up could tell me what crank pulley they run?

 

Thanks in advance!

 

G

Edited May 3, 2014 by Guillaume69

[BuckeyeDemon 211]

i don't think i will be much help, but i'm running what I believe is the original crank pulley on my 69 351w car. it was a single pulley, with only three holes. i'm not sure i have any picture with the code on it.

 

[BuckeyeDemon 211]

just looked at the pulley.

 

C9OE-6A312-D

[3pedal 95]

I have a C90E6312E...in excellent condition...$40...shipped , joe

[Guillaume69 150]

Joe, can you confirm your pulley has 2 grooves?

 

Buckeye, I have found almost the same info: single groove would be C9OE-6A312-C or D. I now your engine is back on the car and all, but if ever you had the possibility to measure the outside diameter and depth, that would help me a lot, should I have to get an aftermarket type.

 

Thanks man!

Edited May 3, 2014 by Guillaume69

[3pedal 95]

2 grooves...I'll send a picture, give me your e-mail....joe

[BuckeyeDemon 211]

but if ever you had the possibility to measure the outside diameter and depth, that would help me a lot, should I have to get an aftermarket type.

 

Thanks man!

 

i think i can make the measurements. how is the depth measured?

[Guillaume69 150]

PM sent, Joe.

 

After more research, that C9OE-6A312-D, 3 bolts, single groove is a low production, 1 year only type of deal... They went to 4 bolts in 70. It seems that there is no repro for this one (MU, NPD, etc.) I found a used one for sale on eBay at $200... Yeah, right! "Supply and demand" sometimes definitely sucks...

 

I understand that people needing a replacement used the 2 grooves ones. I'll probably have to do this. And return to the shop to ask them to find my God Damn pulley!

Edited May 3, 2014 by Guillaume69

[Guillaume69 150]

i think i can make the measurements. how is the depth measured?

 

Well I don't really know. If it's a matter of getting all 3 pulleys (alt/crank/water) properly aligned for the belt, so may be from bottom (where you find the holes for the bolts) to the middle of the groove?

 

Again, the reason I am asking this is that I might go with a nice after market replacement pulley. By the way, I really like your damper, Buckeye. What is it? How did you choose it? I know weight matters, but what about the timing markings (degrees)? And thickness?

Edited May 3, 2014 by Guillaume69

[3pedal 95]

I also have a 2 groove water pump pulley C6AE8509A...5 7/8"....joe

[Guillaume69 150]

I won't need the water pump pulley as I undid this one myself and kept it safely at home... Single groove it is.

[BuckeyeDemon 211]

Well I don't really know. If it's a matter of getting all 3 pulleys (alt/crank/water) properly aligned for the belt, so may be from bottom (where you find the holes for the bolts) to the middle of the groove?

 

Again, the reason I am asking this is that I might go with a nice after market replacement pulley. By the way, I really like your damper, Buckeye. What is it? How did you choose it? I know weight matters, but what about the timing markings (degrees)? And thickness?

 

~1 7/8" from the damper face to the middle of the pulley groove.

~6" pulley diameter

 

The damper is an ATI (917511AK). It's designed for a zero (internal) balanced engine (not typical), 3 bolt pulley and the timing marker on the driver side.

[Guillaume69 150]

Thanks Buckeye. Very much! I'll look into all this soon.

[Fordrevhead 29]

125 is the cheapest I found. http://www.nospartsltd.com/product-p/c9oe6a312d.htm

 

IIRC that vintage has multiple forged pieces spot welded together, 2 on the two piece, 3 on the three piece. The inner pulley of the two should be in the same position and in fact might be the same pulley underneath?? I've always wondered if one could drill the spot welds and make a triple into a double, double into a single, etc.

[Guillaume69 150]

Thanks for the link, very interesting. It's weird that they mention "air conditioning" for a 1 groove pulley. The part number is good, though. $125 is a lot, when you see the new performance stuff you can get now. I guess NOS is NOS!

 

I have a used original 2 grooves coming my way. If it can be modified into a 1 groove, I'll let you know.

 

G

Edited May 5, 2014 by Guillaume69

[Kris 90]

I think I have what you are looking for. It is off a 66 mustang engine I am rebuilding for another project. Was planning on using it but I have 2 others I can use that will work with my setup also. The measurements look the same as what you say you need except my is 6 1/4 wide from outside to outside, don't know where you measured yours though.

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Edited May 5, 2014 by Kris

[Guillaume69 150]

Kris, can you read the part number on it?

[Kris 90]

c5ae-a

 

It came out of a 66 mustang with a 289 if than helps any also.

[Guillaume69 150]

I don't know if it would fit à 351, though. It looks a little less deep on the pictures. If I had to go "non stock", it would be for a more performance orientated part. Plus, a larger outside diameter would mean overdrive, right? Accessories spinning faster and sucking a little HP, as opposed to under drive? Did I understand that well?

 

But thanks for offering anyways Kris!

[Kris 90]

If it is a 3 bolt I don't see why it wouldn't fit. You can measure your bolt holes from center to center and that will tell you. A smaller pulley should spin faster than larger pulley as it takes less to make a full revolution. With that being said, the small amount of difference of 1/4" or less in diameter shouldn't be noticeable. As for it looking smaller in the picture it is 1 7/8" from the back to the center of the belt groove. But good luck with your search.

[stangme428 33]

if you don't go with stock pulleys, CVF Racing has 3 bolt sets at a good price, i went with them on my build.

[Guillaume69 150]

If it is a 3 bolt I don't see why it wouldn't fit. You can measure your bolt holes from center to center and that will tell you. A smaller pulley should spin faster than larger pulley as it takes less to make a full revolution. With that being said, the small amount of difference of 1/4" or less in diameter shouldn't be noticeable. As for it looking smaller in the picture it is 1 7/8" from the back to the center of the belt groove. But good luck with your search.

 

Kris, PM answered.

[Guillaume69 150]

if you don't go with stock pulleys, CVF Racing has 3 bolt sets at a good price, i went with them on my build.

 

Thanks for the link!

[Guillaume69 150]

Received stock pulley yesterday. 2 grooves, but it'll perfectly work! Already cleaned and ready for primer and paint. Thanks Joe!

 

 

 

[Guillaume69 150]

Woohoo! I finally found a single grove 69 351W crank pulley (C9OE-6A312-D) at a reasonable price ($50). I also found it locally, so just had to go and pick it up. After a little refurbishment, it'll go straight on the engine. Just meant to close the loop here.

 

G