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View Full Version : LT1 Circulation Water Pump Rebuild


EricB
09-16-2009, 02:50 PM
FYI;
If anybody had a LT1 with a water leak from the back of the engine circulation pump (at the cam drive), it can be repaired vs. replacing the whole pump. I'll attempt to detail in the next few days but needless to say I fixed mine (new seal, bearing and drive shaft) for about $65 (and my labor).

1redTA
09-16-2009, 11:26 PM
On street driven lt engines a leking waterpump will take out the opti spark most of the time. Most of the street cars run a car electric pump and plug the cam drive with a freeze plug. I am new to mastercraft boats and not familiar with the marine version of the lt. Forgive any ignorance but I didi this to my street driven TA with 400+ rear wheel horse power

Jaysonsmith
08-29-2010, 11:02 AM
I'd like to hear how you did that. Mine is leaking.

1redTA
08-29-2010, 12:38 PM
you can get an electric pump http://www.summitracing.com/parts/MEZ-WP118/

you have to plug the front of the engine where the pin drive comes thru the timing cover also.

blackcreek
08-29-2010, 03:51 PM
On street driven lt engines a leking waterpump will take out the opti spark most of the time. Most of the street cars run a car electric pump and plug the cam drive with a freeze plug. I am new to mastercraft boats and not familiar with the marine version of the lt. Forgive any ignorance but I didi this to my street driven TA with 400+ rear wheel horse power
No opticrap on the indmar, they use a northstar based system. Crank inductor wheel and hall effect sensor pickup.

JimN
08-29-2010, 04:04 PM
As long as the pump cools the heads first like it does on the LT-1, it should be fine.

How much current does the electric pump draw and what's the flow rate?

EricB
08-30-2010, 04:02 PM
Visit this site for LT1 rebuild:

http://www.smokinvette.com/corvetteforum/showthread.php?t=2812

He shows you how to rebuild and the Kit is availabel on-line.
Why put on electric?