1972 SN Promo Project

for what its worth, when I was looking at new "Chrysler Marine Circ Pumps" they were all listed as "bi-directional". I would imagine that would include the impellor as well. On the flipside, I noticed the impellor on a car pump was flipped upside down so the flukes protruded outward instead of toward the pulley.

Circ pump impellers aren't directional ?

JoeinNY wrote: I would run to here and punch in my credit card number...

Or Hurrikain?

Frankenotter wrote: Going to need some help here boys. This water pump is baffling. I cant find anything close to a replacement online and I'm not sure how it goes together.

The sound puked on my computer so I think I know what you are getting at. Anyway, a few years ago I had a very rare aluminum water pump for a ZL1 427 Chevy engine rebuilt. They completely rebuilt it for me and only ran around $50 for the whole job. You may want to look at that option.

baitkiller wrote: This is kind of like re building a Sopwith Camel.

I think a Camel would have less corrosion and be in better shape. lol

The engine plan for now is to stay with everything original, but upgrade the heads to the coveted "swirl port". This would allow me to use the original cam, intake, and stock pistons......yet offer better flow and more HP. How much.......I'm not sure.

What's the stock HP of the 340? Is the plan to stay stock, or warmer?

This is kind of like re building a Sopwith Camel.

Update from the land of engines.......

I am currently working under the direct tutelage of Mr. Zach who is my guide through the jungle of Mopar casting numbers and options. I have sourced a few 340 blocks in my area and now its just a matter of price and logistics. I have also been sorting through head options for the rebuild. I will dive into that subject later.

For the time being, I have focused my attention on cleaning up the engine parts that I will reuse. I'm headed to a shop tomorrow that has a sand blaster and parts cleaner to try to clean the surfaces of the 30+ years of schmoo that have gathered upon them.

I also started pressure testing the exhaust manifolds.



Video 30

That lifter tray is awesome. Post a link of where you sourced that baby.

I will get my ear down with some of the Mopar guys on blocks and such.

EDIT: Also, post a picture of the front of that water pump housing. It looks like it may be the early housing from 69 and earlier. I thought most of the small block Mopars were Sans Circ pumps until later on?

I would imagine a RR impeller would be extra tough to source. I stock piled some of the early pumps for my car (accessories bolt to it that wont fit the later pump) but I would imagine swapping over to the newer pump in your case wouldn't be too hard since its easier to play around with accessories on a marine application. I think it was just my P/S pump that was the issue with swapping pumps. Alternator was ok.

jbear wrote: thanx Larry goggle

Well, I don't know why the Videos aren't showing up in the main body like they used to. Something must have changed in the format. If you know what I'm missing let me know. The links at the bottom of the post should still work.

Anyway, for those that cant watch, you can see the crack in the block above the water jacket. You can also notice in the pictures that the freeze plug directly below the damaged area is popped. I guess you can use this as a lesson to at least drain your block for the winter, even if you do nothing else.

I know it's a longshot, but if anyone on the site has a 340 block they aren't using, let me know and it will go to a good home.

Steve is a ham in a suit when the camera is on.

This is a bad discovery video.



Video 28

No he doesn't.

Tool Coordination

Style points for color coordinating the engine stand and extension cord!