Heater install question... Square drive bolt in engine block?

Might call heater craft to see if they sell you the tee.

http://www.heatercraft.com/heater-hose-fitting-kit/

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Originally Posted by brain_rinse

Thanks, Joe! That should work great, assuming I can find the splitter.

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I believe i may have that splitter...i can check

I have that left over...I was wondering what it was for.. :) I think I saw that at homedepot, if not let me know you can have this one for cost of shipping...

I found the parts I needed to make the T, thanks guys.

Another question... I'm thinking I only need one shutoff valve, on the hot side. If the heater core were to get a leak, shutting the hot side only should keep water from flowing through the system, right? Same principle with the hose connections that parrot added... If I did this only on the hot side I should be able to blow the water out the other side. I'm using the low idle wye http://www.heatercraft.com/low-idle-...5-hb-x-5-8-hb/ so the water would just dump out the bottom of the boat when winterizing. I think... Anyone see an issue with my approach?

Better to be safe than sorry or have to add it later.

I added 2 couplers so when you winterize you will be able to see when all the water is out when blowing the lines or adding antifreeze. If not you'll have to guess.

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I had two myself, cheap easy insurance..

I was thinking fewer cuts in the hose/points of failure more than anything. If the cold return line was attached to the block it would be a no-brainer though, I agree. Thanks for input. Maybe I should start drilling some giant holes and forget about these little details. :)

The heater hose is easy to cut and add the shut off to. i added mine along the rear locker run.. and one on the top of the block. the hard cut was the slow idle wye tube. I never was able to get to the larger hose to add that, then traded the old boat anyhow. Not sure how the new one is configured.