Water Pump Question....

[EricG]

I got back from a great day running and found a lot of water in my bilge. While I was flushing out the salt-water, I found the problem....water is Pouring out of my water pump (not the crank mounted one, but the normal circulating pump).

My questions;
Is there a difference between a Marine and Auto circ pump?
My motor is a 350 (according to the valve covers, it's a 350FLV - possibly a chris-craft model?). Are the circ pumps from the mid 70's fairly standard - or what numbers would I need to look up which one I need?

Any info would be appreciated. Thanks!!

-EG

[mattyboy]

yes it is a chris craft model 350flv we just converted the 350flv in the cig to a crossover system eliminating the circ. pump one less belt and a whole lot less plumbing


Matty

[GKricheldorf]

The marine water pump also has a ceramic seal and brass impeller. So the automaotive pump will not work.

[EricG]

Thanks for all of the responses. I pulled the old pump this AM and I'm a little concerned that it was a non-marine pump, since the impeller was solid rust, it doesn't seem like it was brass :eek:. Also, it had a GM part number stamped on it...but maybe that is normal. I got a new pump today but I'll have to go to another place tomorrow to get the hoses I need.

I have another question:

Should I use permatex on the gaskets when I install the new pump? Also, does anyone know what I should torque the bolts to?

Thanks again for all of the help...

-EG

[MOP]

Yes to using a good sealer on the gaskets, it is also a very good idea to coat the hose nipples and the inside of the hoses with non hardening gasket compound rubber hoses can corrode things pretty bad. The book shows 30lbs torque for the 5.7.

Phil

[EricG]

Thanks again for the advice! That's exactly why I love this place...somebody always knows the answers :biggrin:

Hmmmm, putting the boat back together just in time to fly out of town until the Lake Chelan gathering...boy I hope this fixes the problem!!

Thanks again,

EG

[Cuda]

I always use #2 Permatex.

[Rootsy]

Exclusively found in my toolboxes

Permatex ULTRA BLACK... for anything without a lot of heat on it (exhaust manifolds, etc)...

UNLESS

you can aquire some Loctite Gasket Eliminator.. the dark red stuff.. watch out it is nasty, sticky, goo.. but it is the best.. hands down... it doesn't harden either unless it is severely heat cycled... and a little goes a long way...

but anyway.. yes put a thin layer or small bead of whatever you end up using all of the way around the gaskets...

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