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Posted: November-25-2012 at 2:21pm |
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Would anyone have a exploded view of the dual by pass system {cooling} or can one tell me just how much water is let in the engine block prior to the thermostat, fully opening?
thanks ... |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Linda,
I'm confused to what you are actually asking. The RWP always pumps the same volume. What the engine doesn't need via the T stat, the excess water goes out to via the exhaust. |
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They claim there are small openings? That allow this? |
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davidg
Grand Poobah Joined: January-07-2008 Location: NW Chicagoland Status: Offline Points: 2239 |
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Not sure whether this answers your question exactly or not, but, I drained my block and manifolds (PCM), and drained it into a bucket. It filled about half of a 5 gallon bucket. Hope this helps some.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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5 gallons at 3000 RPM for every 15 seconds is the norm. If the T stat does not open, there is NO water flow into the block. The "dual by pass" you are referencing is what I mentioned about water being diverted to the exhaust manifolds even when the engine doesn't need it.
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8122pbrainard-----See the above info from PCm-- Sounds like there is a certain amount of water that gets to the block, even before the thermo opens?
...Am I reading this right? Thanks again for all your help |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5796 |
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This is the same reason you don't have to warm up your engine in order to get anti freeze in the block when winterizing. Hollywood has posted a photo of a thermostat housing recently showing the bypass. Other than that I have no idea what you are asking.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Linda, I as well as Alan are obviously confused to your question??? What are you really concerned about? "not according to some in the forum"? Tell us more!! |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Linda,
You are being mislead by others who feel the T stat must be warm/open to allow the anti freeze to enter the block. This is a misunderstanding. A engine block has a in and a out. The T stat controls the out. When you pour in the the antifreeze it will go into the block via the low porting on the block. I'm sorry to hear that you via searching the site found some idiots that do not know what they are talking about!! |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13520 |
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Sounds like she did a suck up method without draining first, possibly without the engine up to operating temperature.
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75 Tique
Grand Poobah Joined: August-12-2004 Location: Seven Lakes, NC Status: Offline Points: 6130 |
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_____________
“So, how was your weekend?” “Well, let me see…sun burn, stiff neck, screwed up back, assorted aches and pains….yup, my weekend was great, thanks for asking.” |
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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No, antifreeze will not get into the block if the engine was not drained first. (and engine not hot).
So you need to know if the person doing the winterizing drained both block plugs before sucking the antifreeze. |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13520 |
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Full circulation if water doesn't mean it's all from the RWP.
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ty..... |
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65 'cuda
Platinum Member Joined: July-12-2005 Location: Cincinnati, OH Status: Offline Points: 1091 |
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Think about it this way, the thermostat is the EXIT from the block, the circulating water pump will circulate the water in the block until it warms to the temperature the thermostat will open, then the pressure drop described above will allow the raw water pump to replace that water with cool water from the lake, the presure balance occurs in the thermostat housing.
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8122pbrainard---------------- hoping that some made it.. for now-- temps dropped big time... If some made it then I'm hoping I have bought some-time............................!
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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If the block was drained prior to sucking in the antifreeze it got in, if the block was not drained it probably didn't at least not as much as you want in it.
Pull a drain plug see if you get antifreeze or water. |
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How about taking the thermo out and doing the suck up method? about 6 gallons.. Would this be ok? If i did get some for now then , i'm hoping time was bought..ty GUN! |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7957 |
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You got to remove the drain plugs.
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Hollywood
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75 Tique
Grand Poobah Joined: August-12-2004 Location: Seven Lakes, NC Status: Offline Points: 6130 |
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Those are excellent graphics to help clear it up HW. One question though. Even tho we are supposed to drain then pour, not suck it up, there are many that suck it up (with or without draining) If you go the suck it route (not that bad, if you drain first, right?) and the engine is cold (i.e. t-stat not open) Why does it not happen like your "cold" picture vs your "pour/suck up" picture. I believe I have heard people say the t-stat does not have to be open to successfully suck up AF, (because the t-stat controls flow out, not in) so what determins if the AF goes to the manifolds (Your "cold" picture) vs going into the block (your "pour/suck" picture)?
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21190 |
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Sucking up is usually a bit more cumbersome than pouring in (especially on a direct drive), but theyre both effective. Of course, you MUST drain first.
The difference between the cold vs. the pour/suck diagram is the presence of water in the block (cold) vs. empty (pour/suck). Fluid will not enter the block if its already full and has nowhere to go. Its going to follow the path of least resistance... which would be out the manifolds. If everything is empty, the port in the PCM t'stat housing that feeds the block is lower than the exit to the manifolds- so gravity ensures it will fill first. Not all thermostat housings are created equal though... so if trying to fill a non-PCM, the safe bet is to pour in through the large circ pump hose. |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7957 |
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So, if the problem is that the block wasn't drained and the drain plugs cannot be removed and it is going to get really cold before the boat can be fixed properly, I would punch holes in the freeze plugs and let everything drain and then pour 5 gallons of anti freeze through it and let it all drain out and fix it right come spring. Better than worrying all winter. This is a last resort hobbiest move that I've done in an emergency.
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Good Luck Linda - Hope it is OK.
This is the type of information that we can straighten out. |
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“Beer is proof that God loves us and wants us to be happy.”
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