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Old 02-03-2007, 09:45 PM   #1
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What is it?

On my engine I have a large brass fitting where the red circle is on this diagram. It has a pipe which runs from it down to where I think is the poppet valve at the bottom (circled in blue)
What does this do? Can it be removed if its not really needed?
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Old 02-03-2007, 09:47 PM   #2
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On my XR2 the pipe out of the blue circled bit goes straight out to the cowling and the brass fitting at the top is blanked!
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Old 02-03-2007, 09:50 PM   #3
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Quote:
Originally Posted by scottyboy View Post
On my XR2 the pipe out of the blue circled bit goes straight out to the cowling and the brass fitting at the top is blanked!
Does your XR2 have two tell tails?
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Old 02-03-2007, 10:00 PM   #4
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Yup!
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Old 02-03-2007, 10:07 PM   #5
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I wonder what its all for then?
Have u got a fitting in your block for a water pressure gauge?
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Old 02-03-2007, 11:22 PM   #6
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its to do with cooling.
you will have poppet valves and thermostats and stuff in your fishing motor. the race motors do away with all this cus it creates restrictions when on it!
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Old 02-03-2007, 11:45 PM   #7
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Quote:
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its to do with cooling.
you will have poppet valves and thermostats and stuff in your RELIABLEfishing motor. the race motors do away with all this cus it creates restrictions when on it!
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Old 03-03-2007, 09:41 AM   #8
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This will be the Red Divider BrassTee Bypass to the Poppet Valve Blue Circle Assembly. and best left in place (Water Pressure Relief Valve, really) You can remove it & bypass if you want well on the old V6's you could dunno about this modern stuff.
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Old 03-03-2007, 12:56 PM   #9
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Quote:
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I wonder what its all for then?
Have u got a fitting in your block for a water pressure gauge?

Yeah comes out of the top of the head from memory?
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Old 03-03-2007, 03:33 PM   #10
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Should come out at the top of the exhaust chest cover.
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Old 03-03-2007, 03:49 PM   #11
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Should come out at the top of the exhaust chest cover.

Knew it was around there somewhere!
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Old 05-03-2007, 05:32 PM   #12
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Rob have a look qat that manual I posted pages
4A-16
4A-36
Calling it an Idle Shuto Of Valve

4-19
4-32
Calls it a Water Pressure relief Valve
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Old 05-03-2007, 08:55 PM   #13
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it vents any air from the block . i,ve got a mod you can make to a one peice plate to enable you to keep the poppet valve and stats in and have about 3-4 psi water pressure at idle instead of nothing also helps prevent cold seizing when the heat drops out the block suddenly
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Old 05-03-2007, 09:03 PM   #14
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Quote:
Originally Posted by sinkunit0 View Post
it vents any air from the block . i,ve got a mod you can make to a one peice plate to enable you to keep the poppet valve and stats in and have about 3-4 psi water pressure at idle instead of nothing also helps prevent cold seizing when the heat drops out the block suddenly
Hows that work then?>
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Old 05-03-2007, 09:42 PM   #15
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the adaptor plate has a bit welded under where the poppet goes with a dump out the side so vary pressure
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Old 07-03-2007, 01:00 PM   #16
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also helps prevent cold seizing when the heat drops out the block suddenly

Why would the heat drop out the bolck suddenly? I allways thought cold seizing was caused by letting the motor warm up to quickly, i.e ragging it when its cold.
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