I know some of you guys have bought March serpentine set-ups. Can I ask anyone with a Pontiac set-up to measure the water pump pulley from front surface to back suface? And (if possible) provide me with the actual March part number for the WP Pulley.

Muchos Gracias in advance.

Q

Hi PMI, I'm not at the house, and not certain I could get an accurate measurement without removing the pully either.

It does require a specific length nose on the water pump, I will post that pump number when I get home if that will help.

JM

http://www.marchperf.com/pg42.html

Says it requires 4 1/2" water pump but gives no depth..part number 13012 1 groove, 13032 2 groove

Not sure if any of this is helpful at all...

Thanks for the hints. However, I am looking for something very specific. That measurement is key to what I am looking for. It's for another applicaiton and knowing the requirements of the pump isn't as helpful.

Do you EVER use parts for the specified application? :p

Vikki, LOL, he`s an engineer ,they always come up with new applications....

If March would make a serpentine kit for the 1966-1968 OHC, I would not have to worry about this.

And, since I now posess an off-the shelf serpentine kit for the 1969 OHC, I was thinking it might be nice to go for the four-play.

Q,

I'm not going to be able to help you. My car is at an upholstery shop for at least another week and even if I went down there, I don't think I could get the measurement you're after with the pulley installed.

I also checked my original boxes and the basic pulleys come in a kit box with the kit part number.

Have you tried calling March? They were very helpful when I had an issue with one of the parts. I'm very happy with the kit and my only knock is the cheap hex head fasteners they use. I replaced all of mine with SS.

Thanks for trying. I wasn't going to suggest it, but the March p/n is usually inscribed inside the pulley.

I'll call them tomorrow ... thanks for the suggestion.

Also ... about the fasteners. I am advising you to consider Zinc plated steel instead of stainless. The stainless will cause the Aluminum to corrode. I have a PS pulley with stainless cover screws and I tossed them in favor of Zinc plated steel.

Just my opinion ...

and probably a very good one.....

Q,

I would normally agree with you, but:

1. This car is not going to see a lot of rain/exposure to electrolytes
2. The fasteners are a 400 series SS so not as far away in potential as Grade 8 SS fasteners
3. The more noble metal is small in size compared to the less noble metal, further mitigating corrosive effects. This is why the aircraft industry can get away with SS fasteners in al structures.

The zinc fasteners, while closer in potential to aluminum, are less noble and when surrounded by the larger mass of al are a little more prone to corrosion than otherwise. The main reason that I switched to SS, with some caution, is that a few of the zinc fasteners rusted in only six months of sitting in a completely dry, never filled engine.

I didn't spend a boat load of money on those pulleys to see them attached by rusty bolts so you can believe that I'll keep a close eye on the SS fasteners. So far with coolant in the engine for over 18 months, there have been no visible problems.