Rear Crossover on intake manifold
02-04-2010 | 05:52 PM
#21
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From: NW Michigan
are guys still doing this? also is it imperative to do it on both sides of the intake? i may do this on my 496's and have a t fitting on one side or the other with a pressure relief valve. seems sensable.
02-04-2010 | 09:54 PM
#22
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From: Tennessee
I always do it. However, I dump the lines overboard. I not only use it to eliminate any steam pockets at the rear of the heads and intake, but I also use it to control water pressure. I will start out with a #4 coming out of each side. They run to a tee and dump overboard. If I need to get rid of more water, then I will up the hoses to #6. My dump hose is a #10, so I can go up to (2) #8 hoses from the rear of the intake to control water pres.
I do not run a check valve on it because I want it to flow water all the time. You could run hoses to the front of the engine, but then it will not work to help in controlling water pressure. That is always not nesseccary, but it is nice if you need it. You must run a hose from each side of the rear of the intake since there is no crossover to tie the 2 sides together.
Eddie
I do not run a check valve on it because I want it to flow water all the time. You could run hoses to the front of the engine, but then it will not work to help in controlling water pressure. That is always not nesseccary, but it is nice if you need it. You must run a hose from each side of the rear of the intake since there is no crossover to tie the 2 sides together.
Eddie
02-04-2010 | 10:15 PM
#23
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Joined: Feb 2009
Posts: 8,356
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From: NW Michigan
I always do it. However, I dump the lines overboard. I not only use it to eliminate any steam pockets at the rear of the heads and intake, but I also use it to control water pressure. I will start out with a #4 coming out of each side. They run to a tee and dump overboard. If I need to get rid of more water, then I will up the hoses to #6. My dump hose is a #10, so I can go up to (2) #8 hoses from the rear of the intake to control water pres.
I do not run a check valve on it because I want it to flow water all the time. You could run hoses to the front of the engine, but then it will not work to help in controlling water pressure. That is always not nesseccary, but it is nice if you need it. You must run a hose from each side of the rear of the intake since there is no crossover to tie the 2 sides together.
Eddie
I do not run a check valve on it because I want it to flow water all the time. You could run hoses to the front of the engine, but then it will not work to help in controlling water pressure. That is always not nesseccary, but it is nice if you need it. You must run a hose from each side of the rear of the intake since there is no crossover to tie the 2 sides together.
Eddie
So if I understand you correctly don't really bother tieing into the front jackets. only rear. Makes good sense. Also like the idea of dumping if out and forgeting about the pressure valves. Those are known to NOT always work either. Also as long as were on the sub what is ideal pressure again?
Thanks
John
Last edited by getrdunn; 02-04-2010 at 10:19 PM.
02-04-2010 | 11:06 PM
#24
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Joined: Jun 2006
Posts: 14,914
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From: Lake Conroe, TX.
I always do it. However, I dump the lines overboard. I not only use it to eliminate any steam pockets at the rear of the heads and intake, but I also use it to control water pressure. I will start out with a #4 coming out of each side. They run to a tee and dump overboard. If I need to get rid of more water, then I will up the hoses to #6. My dump hose is a #10, so I can go up to (2) #8 hoses from the rear of the intake to control water pres.
I do not run a check valve on it because I want it to flow water all the time. You could run hoses to the front of the engine, but then it will not work to help in controlling water pressure. That is always not nesseccary, but it is nice if you need it. You must run a hose from each side of the rear of the intake since there is no crossover to tie the 2 sides together.
Eddie
I do not run a check valve on it because I want it to flow water all the time. You could run hoses to the front of the engine, but then it will not work to help in controlling water pressure. That is always not nesseccary, but it is nice if you need it. You must run a hose from each side of the rear of the intake since there is no crossover to tie the 2 sides together.
Eddie
Theoretically, It would just be minor metal shavings that would exit with the water, but ???????????????
02-05-2010 | 03:36 AM
#25
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From: Tennessee
02-05-2010 | 09:57 AM
#28
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
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From: Elkton, MD
I'm running #6's to a "y" connector, then a single #6 overboard. Helped me lower water pressure a few lbs. and control the temps! 
Also, I put the dumps on the side of the boat so I could peer overboard to confirm I'm pumping water at any given time.
Also, I put the dumps on the side of the boat so I could peer overboard to confirm I'm pumping water at any given time.
02-05-2010 | 10:34 AM
#29
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From: Tennessee
Yes, it will still benefit you by not allowing steam pockets to form in the back of the engine.
Eddie
03-15-2012 | 07:24 PM
#30
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Joined: May 2011
Posts: 81
Likes: 9
From: OC california
Yes I know this is old, but going through reading stuff.
Would this still work if I ran the hoses to the back of my exhaust wherer I have another place I can remove the plug and put in another fitting?
Would this still work if I ran the hoses to the back of my exhaust wherer I have another place I can remove the plug and put in another fitting?
