Water pump question-gctid366330

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I have a marine water pump rebuild kit here that has the impeller of brass and SS bearing, and seal..

My question is can I use a car pump if I replace the innards with the marine innards? Everything else

Is the same externally that I can see. I have a press and all to do the job. And it would be a great

Expense reducing thing.. Just asking..

Jim

[SuperiorDiver Seasoned Member Find all posts View Profile Close SuperiorDiver]

I assume you are referring to the circulating pump, not the supply pump. On one of my 7.4 Litre engines, I did replace the water pump with a conventional automotive pump, still running after 15 years. But, the boat is operated in fresh water (Lake Superior), open cooling system.

[2850Bounty Supporting Member Find all posts View Profile Close 2850Bounty]

Jim, need more information.

Will this new engine be raw water cooled, or equipped with a Closed Cooling system?

If CCS, then you can easily use the Automotive Circulating pump. It won't know that it's installed in a Marine Engine unless you tell it!

If raw water cooled, then you must use the Marine version if you want any longevity from it.

The impeller will be bronze, the rear cover will be SS, and the ceramic seal is a bit different in-that it will not be lubricated with Ethylend Glycol.

I believe that the double bearings are the same.

These are nothing more than a SBC Short Body Circ pump housing, so the kit should work with either casting.

.

[Chief_Alen Guru Find all posts View Profile Close Chief_Alen]

Saltwater the vanes need to be brass otherwise the casting the same.

[Guest Close Guest]

SuperiorDiver wrote:
I assume you are referring to the circulating pump, not the supply pump. On one of my 7.4 Litre engines, I did replace the water pump with a conventional automotive pump, still running after 15 years. But, the boat is operated in fresh water (Lake Superior), open cooling system.

Yes Sir, Circulating pump is what I was refering to.. It will be in fresh water only. I was going to ask abut the auto type pump, but I did not want to start

any crazyness going here.

[Guest Close Guest]

2850Bounty wrote:
Jim, need more information.

Will this new engine be raw water cooled, or equipped with a Closed Cooling system?

If CCS, then you can easily use the Automotive Circulating pump. It won't know that it's installed in a Marine Engine unless you tell it!

If raw water cooled, then you must use the Marine version if you want any longevity from it.

The impeller will be bronze, the rear cover will be SS, and the ceramic seal is a bit different in-that it will not be lubricated with Ethylend Glycol.

I believe that the double bearings are the same.

These are nothing more than a SBC Short Body Circ pump housing, so the kit should work with either casting.

.

You funny guy Bounty.. "Unless I tell it..."

It is raw water.. So I'll change the inards eather way just to be safe..

Thanks a ton Guy's..