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

[brain_rinse]

Finally starting on the heater install and have a question on where to install the "hot" hose. I have a sensor on the top where Al installed his so am thinking the location Jester shows in the pics here would make the most sense.

https://forum.moomba.com/showthread.php?9877-Winterization-Procedure-with-pics-by-Al&p=82556#post82556 (https://forum.moomba.com/showthread.php?9877-Winterization-Procedure-with-pics-by-Al&p=82556#post82556)

The problem is that the bolt at that location has a square head and nothing in my tool box fits it. I thought just a 3/8" extension would work but it's a little too big. Ideas? Maybe they did that so guys like me don't remove it?

[mcdye]

My '02 factory install was above the starter on the block. That appears where Jester's is located at. It is just a block plug.
My '10 was on the manifold next to the thermostat housing.

[brain_rinse]

Do you happen to have a pic of the 2010 location? I'm good with the dipstick location if I can figure out how to get the plug out.

[parrothd]

https://forum.moomba.com/showthread.php?10840-Heater-Install-in-2006-LSV&highlight=heater+install

[brain_rinse]

https://forum.moomba.com/showthread.php?10840-Heater-Install-in-2006-LSV&highlight=heater+install
Thanks, but that's the Al I was referring to. I've got a sensor in that location.

[parrothd]

I added 2 garden hose couplers so you can winterize easier. What about the other port on top?

Sent from my Nexus 4 using Tapatalk 2

[brain_rinse]

Also a sensor... I like the hose coupler idea!

[mcdye]

'02 - 1 Connection to the block port above the starter and the other to the water pump.

[jmvotto]

Dan, I used this splitter that came with the kit and added the t stat there and a shutoff valve.

Post 3. Pic 4 below.

https://forum.moomba.com/showthread.php?14872-another-heater-install-help&highlight=Heater

[brain_rinse]

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

[jmvotto]

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

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

[mcdye]

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

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

[parrothd]

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...

[brain_rinse]

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-wye-1-25-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?

[parrothd]

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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[jmvotto]

I had two myself, cheap easy insurance..

[brain_rinse]

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. :)

[jmvotto]

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.