water flow diagram

[Doug Durako]

Greetings. Winter is near again in the Midwest. For many years, I have used the "gravity flow" method of pumping antifreeze up from the lower unit impeller through the cooling system. I run on the muffs and the hose until thermostat opens, then switch to a funnel and antifreeze to the muffs. When it comes out green from the exhaust ports at the bottom of the drive housing, I fog the motor and shut 'er down.<br /><br />This year, antifreeze never made it to the motor. Mechanic said the impeller tube was not hooked up correctly. He fixed it free because he is a good guy.<br /><br />Does anyone have a good diagram showing the tube setup from the impeller housing all the way up into the motor?

 

[Blk-n-Blu]

Re: water flow diagram

dd, Try this page :<br /> http://www.boatered.com/forum/topic.asp?TOPIC_ID=51323

 

[rodbolt]

Re: water flow diagram

careful with that method.<br /> just cause its green coming out does not mean the block is full. at idle the t-stat spends most of its time closed and all your solution is driven out the manifolds and risers.<br /> good luck and keep posting and quit using the green stuff. it kills all sorts of stuff. use something like ban frost 2000 which is a proplyne glycol made for closed cooling with low toxicity

 

[Don S]

Re: water flow diagram

Mechanic said the impeller tube was not hooked up correctly. He fixed it free because he is a good guy.

If that tube had not been hooked up, you would have had an overheat problem for the simple fact that there would be no way for the water from the pump to get to the engine.<br />Did you by any chance seperater the upper and lower units to replace the impeller and miss the tube on reassembly???? Something none of us pro's have ever done. <br />It's easy to miss, so don't panic if that is what happened. But if you didn't have it apart, I would be asking what those guys were really talking about.<br /><br />Don't know of any diagrams, but basically there is a tube that goes into the water pump that connects to the water passage in the upper unit. From there it goes into the hose that goes through the transom.

 

[Doug Durako]

Re: water flow diagram

Don---yes, he had it apart. I was trying to follow what he was telling me--exactly what you said. But I was getting water when the hose was on and I was turning about 1K rpm---it just would not go through with my bucket and gravity method.<br /><br />Rod---I'll try the ban frost 2000. I always do this in the rock at the end of my drive to kill the weeds. I water it down well with the hose so no neighborhood pets are tempted by it.<br /><br />Thanks!!

 

[tommays]

Re: water flow diagram

i hope you dont drink well water<br /><br />tommays

 

[Bondo]

Re: water flow diagram

Ayuh,<br />And,<br />Dry Blocks Don't Freeze....................

 

[Doug Durako]

Re: water flow diagram

Bondo----Greetings----To get the water out, I only see two blue twist drains---one on each side where the rubber tube enters the bottom of the riser. I can't see any drains anywhere else. Do I just need to pop these two? They only seem to drain about eight ounces of water per side.<br /><br />I popped them 'cause that is where I was looking to make sure anti-freeze is moving throughout the system. I also pulled the main hose going to the water pump on the front of the motor and only got another 8 ounces of water there.<br /><br />Would that be all I would need to drain? Or is there more water lurking someplace?<br /><br />Thanks!

 

[Bondo]

Re: water flow diagram

Hi dd, Unless you have some Fancy Draining System..??...<br />

Would that be all I would need to drain? Or is there more water lurking someplace?<br />

My Guess is that you Still have a Block Full of water............ <br />The Block drains on a Chevy are Below,+ Behind the the blue 1s you found........<br />There'll be 1 Just ahead of the Starter, just above where the Block turns into the Oil Pan......<br />The other 1 is Just ahead of the Oil Filter, at the same elevation...........<br />Also,<br />If you've got P/S,+ it's Cooler lays Under the engine.........<br />Just loosen 1 of the water hose clamps,+ Pull an end off........<br /><br />Leave the Outdrive Down, so it doesn't take on any rainwater..........