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-   -   MCX knock sensors and drain plugs (http://www.mastercraft.com/teamtalk/showthread.php?t=57962)

jwroblew 10-25-2013 08:32 AM

MCX knock sensors and drain plugs
 
I want to add ball valves on the block drain plugs were the knock sensors go. If I put a tee there, with the knock sensor on one end and the ball valve on the other, will the sensor still work properly?

Timr245 10-25-2013 02:55 PM

Well when I bout my 08 X-2 they were unplugged laying in the hull from winterization, and someone put the wrong older style gm sensors in the holes. Not wanting to mess with them til after the season I simply plugged them in and left em lay. Boat ran fine all summer so I assume doing what you want wont hurt a thing. I myself just did it, if I could figure out how to get a pic on here I'd show ya what I did.

Timr245 10-25-2013 03:32 PM

1 Attachment(s)
Attachment 102556

This what I did on both sides. ALL stainless ran about $110. You can skimp on valves if ya want, but that's not my thing.

Rossterman 10-25-2013 04:59 PM

I'd be careful modifying as folks have shown. Knock sensor retards the timing to prevent internal engine damage from pre-ignition. Making a change to location or laying in the bilge means you no longer have this protection for the engine.

In the old days, it wasn't uncommon for engine "pinging" to damage an engine if not addresse. Had a old neighbor that ran cheap gas in his mid 70s car and would hear it pinging all the way up the hill to his house. Told him he better run a higher octane gas but was too cheap to spend the $. Engine went ~ 2 years before it failed :)

horseshoept 10-25-2013 06:48 PM

I would be worried something like that would break off while in use.

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carracer 10-27-2013 12:27 PM

Quote:

Originally Posted by Timr245 (Post 987847)
Attachment 102556

This what I did on both sides. ALL stainless ran about $110. You can skimp on valves if ya want, but that's not my thing.

Will you please post your parts list I am certainly interested in this idea. My concern is over the years the block threads will wear out and then what.... your idea will fix that concern.....


TKS..........

FrankSchwab 10-27-2013 02:48 PM

Quote:

Originally Posted by carracer (Post 988075)
My concern is over the years the block threads will wear out and then what

Well, put Brass plugs in the holes. The likelihood of Brass wearing out the cast iron of the engine block is about nil. After 100 years of removing/replacing the brass plugs, they'll wear out and you can replace just the plugs.

I'm not a fan of these kinds of drain valves. When I pull my drain plugs, I normally have to stick a screwdriver in the hole to knock the scale loose before the engine will drain correctly. With a valve in place, you'd never be able to do that.

FrankSchwab 10-27-2013 02:54 PM

Quote:

Originally Posted by carracer (Post 988075)
My concern is over the years the block threads will wear out and then what

Well, put Brass plugs in the holes. The likelihood of Brass wearing out the cast iron of the engine block is about nil. After 100 years of removing/replacing the brass plugs, they'll wear out and you can replace just the plugs.

I'm not a fan of these kinds of drain valves. When I pull my drain plugs, I normally have to stick a screwdriver in the hole to knock the scale loose before the engine will drain correctly. With a valve in place, you'd never be able to do that.

mikeg205 10-27-2013 03:00 PM

Quote:

Originally Posted by FrankSchwab (Post 988100)
Well, put Brass plugs in the holes. The likelihood of Brass wearing out the cast iron of the engine block is about nil. After 100 years of removing/replacing the brass plugs, they'll wear out and you can replace just the plugs.

I'm not a fan of these kinds of drain valves. When I pull my drain plugs, I normally have to stick a screwdriver in the hole to knock the scale loose before the engine will drain correctly. With a valve in place, you'd never be able to do that.

Frank - didn't know you were that old.. ;)

FrankSchwab 10-27-2013 04:25 PM

Quote:

Originally Posted by mikeg205 (Post 988104)
Frank - didn't know you were that old.. ;)

Get off'n my lawn! Go on, get outta here!

Dang whippersnappers!


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