Filling manifolds with antifreeze?

[SAshton]

Pretty sure it's a no but when filling manifolds with antifreeze can you fill too much and have it enter the engine when it gets to top of riser? Engine is off so no exhaust pressure. What stops antifreeze from entering engine? Should I fill until I hear it exiting exhaust in the outdrive? I have the never dry joint style


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[Great lakes pirate]

The water/antifreeze doesn't have a chance to mix until it exits the elbow. Since the elbow is turned down at a 18 degree angle your friend gravity doesn't allow the water to back flow down into your engine.

When I fill my engines with antifreeze at the thermostat housing I never get any antifreeze to go up and over the elbow's. They are about 10" higher than the t-stat housing.

 

[BillK2632]

No, like mentioned above the water/exhaust mix on the downside of the elbow. I fill mine at the thermostat housing - fill the block, then pour a gal or so in each manifold hose until it runs out the exhaust.

 

[SAshton]

I thought so but just wanted to be sure the water meets the exhaust on a downward angle. Thanks!


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[SAshton]

I do the same thing and then run on muffs with the winterizer kit from camco for a minute until antifreeze comes out exhaust while running.


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[Great lakes pirate]

No, like mentioned above the water/exhaust mix on the downside of the elbow. I fill mine at the thermostat housing - fill the block, then pour a gal or so in each manifold hose until it runs out the exhaust.

What manifold hose? The one that connects to the bottom of the riser? I would think that since the t-stat housing is below the top of the elbow it would just come out of the t-stat housing. I have never been able to get AF up and over the elbows.

 

[BillK2632]

The hose that runs from the thermostat housing to each manifold - when I lift the hose up to pour in the AF, it must be higher than the riser. Maybe your risers are higher than mine - I have a 4.3 with the older one piece manifold / riser.

On mine I have 4 hoses on the thermostat housing:

1. Big one to the water circulating pump.
2. Inlet from raw water pump (I have an Alpha, so the hose comes from the drive > powers steering cooler > thermostat housing
3. An outlet hose to the front of each exhaust manifold.

To fill with antifreeze I:

1. Pull the 5 blue plugs to drain the block, water pump elbow and manifolds.
2. Pull the large hose for water pump at the thermostat housing side - fill with 2 gal antifreeze until it comes out the thermostat housing - block is full.
An alternate method is to remove the thermostat and fill that way.
3. Pull the two hoses going to each manifold at the thermostat housing - fill each with 1 gal antifreeze until it is full and I hear it run out the exhaust - manifolds are full.

 

[Great lakes pirate]

3. Pull the two hoses going to each manifold at the thermostat housing - fill each with 1 gal antifreeze until it is full and I hear it run out the exhaust - manifolds are full.

When you pull the hose off of the t-stat housing you now have a opening that is lower than the top of the elbow and lower than the hose you are filling. I am confused how the AF gets higher than the elbow but doesn't come out of the t-stat housing.

 

[BillK2632]

When you pull the hose off of the t-stat housing you now have a opening that is lower than the top of the elbow and lower than the hose you are filling. I am confused how the AF gets higher than the elbow but doesn't come out of the t-stat housing.

Yeah, I understand what you are saying, I'll have to pay attention when I do mine next month. I lift the hose up so I can pour in the AF, so at that point it is higher than the riser AND when I connect the hose back a little AF spills out. But AF definitely runs out the exhaust - like I said part of it probably is that my risers probably are not as high as yours since they are the older style AND I don't have any spacers or anything like that. Keep in mind also that the riser would not fill to the top with AF, just trickles out when the manifold is full.

 

[Searayguy185]

Can't you just by one of those winterizing kits that you pull the 5 plugs drain all water and then run 5 gallons of antifreeze through the muffs and you are done? It seems silly to pull hoses off and try to pour into those.

 

[Bt Doctur]

I do the same thing and then run on muffs with the winterizer kit from camco for a minute until antifreeze comes out exhaust while running.


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Unless you drain everything first, thats the quickest way to a new motor and bad advice unless you include"drain everything first"

 

[bbwhitejr]

Can't you just by one of those winterizing kits that you pull the 5 plugs drain all water and then run 5 gallons of antifreeze through the muffs and you are done? It seems silly to pull hoses off and try to pour into those.

Unless you remove the thermostat, you will run the risk of the stat being closed and get none in the block. I can pull the one hose, pour in 4 gallons faster than you can hook up muffs and try to put it in the block with the stat closed....your choice...

Bennett

 

[BillK2632]

I agree, not a fan of the sucking in method. Drain and fill is the only sure way to do it. But I'm not getting into this discussion in July!:smt009