1955 CC Hurricane Restoration

Alan I would be surprised if the rubber gears are not all the same size...that picture above is with the engine upside down.

I'm not sure anyone can look at a Chrysler marine cooling system and fully understand it. There are even provisions in the system for a minimum amount of exhaust back pressure. Rebuild the pump and go boating!

Water flow diagram for this mornings discussion

Gary S wrote: Have you found new impellers Alan or are they a hard find? Look to be the same type as Rogers.

I've got a definite source Gary, think we'll be in good shape.

89Martinique wrote: Wow, very interesting cooling loop. Why the exhaust manifolds first? Or is there no real explanation.

The exhaust manifolds preheat the water helping it reach operating temp much faster. This helps engine wear as the engine components warm up and expand to their correct tolerances faster.

Alan,
I like Joe am too lazy to look back, when you first fired the engine was it on a hose or pulling from a bucket?

BTW, looks awesome wet, cannot wait to see it. You must be quite proud, and you should.

Just be glad I left the same hat in the truck!!!! We would have looked real cute then!!

It was a treat to be there and watch it run in the water. It is absolutely sexy and is a head turner for everyone. They had everything from fishermen, guests in the campground and even a surprise visit from "Joe Dirt" drooling over this boat.

Once this small issue gets fixed I think it will be ready for the lovely couple to take a much deserved ride together!!

How exactly does this gear setup work?

The engine spins these gears(impellers) and the water is pushed by there gears?

Seems strange, never heard of using gears to push water. I figure you'd want a more plunger type like most of our boats.

C-Bass wrote: Gear style pumps are very common. Not sure how common in marine systems, but in general.

Makes sense, i guess i should have said it doesn't seem like it would be very efficient, but I'm wrong on a lot of things.

Yeah i wouldn't change it, i assume the water comes in at the top of those 2 gears and then is propelled through out the bottom?

turningpoint84 wrote: How exactly does this gear setup work? The engine spins these gears(impellers) and the water is pushed by there gears? Seems strange, never heard of using gears to push water. I figure you'd want a more plunger type like most of our boats.

Peter,
Sorry but once again you have inserted you foot into your rectum since you did no research nor have any knowledge on pump types before posting. Yes, gear pumps are very common especially on older marine engines. Here's the one I did on my 1927 Flexifour.

You could also have done a site search and found Older threads like "no super sucker needed"
I thought you were an engineer???????

or an air cooled VW oil pump

Looks to be a extremely well engineered cooling system. Gear driven pump that would be almost maintenance free. I would bet after you install the new rubber gears that it will not only pump efficiently but last for a lot longer than the new style impellers on current pumps.

Just went through back through this complete thread. What a journey Alan, I consider myself quite handy but no where near your talent.

Would love to make it to GL next week to see it in person as I remember what it looked like back at the 09 reunion.

Alan,

I noticed a truck w/a dark green trailer next to your truck on the morning of 7/5. I got a little excited thinking that maybe you had brought out the Hurricane that morning as well, but then I noticed the trailer was different that the pictures you posted.

Can't wait to see it running on the water. Too bad we are going to miss the trip to GL this year.

Scott

Alan, The more I look at that return hose from thermostat housing the more I see a source of air for the RAW pump to suck from instead of water. It would always be empty as the water would syphon back down after shutting engine off.

Without knowing what it looks like inside the thermostat housing. Externally it appears to have a good source of air from both exhaust dump points as well. So there maybe a endless source of air from the exhaust if they are open to that return hose. I doubt the thermostat would seal off the dump to exhausts totally anyway allowing a small bleed past. Any pictures of it disassembled. I thought about it all the way home on the plane. I still like the idea of that tap inline that would close it off and see if that gets the water pumping properly.