Higher flowing coolant filter
Thread Starter
|
Mountain Pass
Joined: Dec 2009
Posts: 229
Likes: 6
Higher flowing coolant filter
Would it be practical to tap into both heater hoses (inlet and return) for a higher flow rate instead of the tiny degass hose? I'm guessing the return heater hose is running along the firewall and Y-ing into the feeder hose under the degass bottle. 
Elder User
Joined: Jul 2006
Posts: 577
Likes: 0
From: Stevens County, WA
It wouldn't work well because when you select " max a/c" or "off" on your climate control, the flow to the heater core is shut off by a vacuum valve. Look under your hood and you will see the valve in the heater core hose beside the oil fill tube. Have someone inside the truck turn the dial to max a/c and watch the valve slowly close off the flow.
Thread Starter
|
Mountain Pass
Joined: Dec 2009
Posts: 229
Likes: 6
The coolant filters tap into the supply side of the heater hose before the climate control valve to feed the filter. I was wanting to run the larger diameter return hose and Y it into the return hose from the heater core right under the degass bottle. 
Would this still effect the climate control ? It seems like it should work and give a higher flow rate thru the filter.
Elder User
Joined: Jul 2006
Posts: 577
Likes: 0
From: Stevens County, WA
The coolant filters tap into the supply side of the heater hose before the climate control valve to feed the filter. I was wanting to run the larger diameter return hose and Y it into the return hose from the heater core right under the degass bottle. Would this still effect the climate control ? It seems like it should work and give a higher flow rate thru the filter.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
It won't flow more. Next time you have a filter in your hand, check out the discharge hole in the top. The Baldwin filters have a 5/32" hole, that's all. That is your limiting factor on flow. If you want to experiment with more flow, you could drill out a filter. Doing so crossed my mind when I first saw the filter.
Elder User
Joined: Jul 2006
Posts: 577
Likes: 0
From: Stevens County, WA
It won't flow more. Next time you have a filter in your hand, check out the discharge hole in the top. The Baldwin filters have a 5/32" hole, that's all. That is your limiting factor on flow. If you want to experiment with more flow, you could drill out a filter. Doing so crossed my mind when I first saw the filter.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
That was near Lee Vining CA.
Trending Topics
Senior User
Joined: Jan 2010
Posts: 434
Likes: 0
I think the biggest limiting factor is pressure differential. To achieve flow you need a pressure differential. you will not get any flow in the bypass if the inlet and outlet are tapped in the same hose regardless of whether the a/c valve is open of not...
The reason your tapping from that hose to the degass bottle is that those two regions have the largest pressure variation. You are limited by the pressure difference between the coolant manifold and degas bottle I don't think increasing the hose or filter sizes will help much...
The reason your tapping from that hose to the degass bottle is that those two regions have the largest pressure variation. You are limited by the pressure difference between the coolant manifold and degas bottle I don't think increasing the hose or filter sizes will help much...
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Mountain Pass
Joined: Dec 2009
Posts: 229
Likes: 6
It won't flow more. Next time you have a filter in your hand, check out the discharge hole in the top. The Baldwin filters have a 5/32" hole, that's all. That is your limiting factor on flow. If you want to experiment with more flow, you could drill out a filter. Doing so crossed my mind when I first saw the filter.
Thread Starter
|
Mountain Pass
Joined: Dec 2009
Posts: 229
Likes: 6
I think the biggest limiting factor is pressure differential. To achieve flow you need a pressure differential. you will not get any flow in the bypass if the inlet and outlet are tapped in the same hose regardless of whether the a/c valve is open of not...
The reason your tapping from that hose to the degass bottle is that those two regions have the largest pressure variation. You are limited by the pressure difference between the coolant manifold and degas bottle I don't think increasing the hose or filter sizes will help much...
The reason your tapping from that hose to the degass bottle is that those two regions have the largest pressure variation. You are limited by the pressure difference between the coolant manifold and degas bottle I don't think increasing the hose or filter sizes will help much...
Senior User
Joined: Jan 2010
Posts: 434
Likes: 0
When you say the same hose do you mean the one hose going to the heater core ? Because I am referring to the 2nd hose exiting the heater core which runs back over and under the degass and hooks to a Y fitting which is the main outlet hose for the degass. I was thinking about taking the Y fitting off which serves as a 3 way and putting a 4 way fitting in. But then again a larger coolant filter would be needed to get more flow if the baldwin filters outlet is only 5/32"nds.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
I see what you mean. I have not bought a filter yet. I see the coolant filter on my Kenworth all the time it has a 1 inch hole on top and I assumed the Baldwins had at least a half or 3 quarter inch outlet. I would like to fit one of those monsters under the hood. The filter alone holds 5 quarts. You could filter the entire system in 5 passes !!
The point about pressure differential is a good one. The heater supply hose comes directly off of the coolant pump. The greatest flow through the coolant filter will be when the engine thermostat is closed, and the heater control valve is closed. At that point all the coolant pump output is directed through the oil cooler, EGR cooler, and the coolant filter. When the heater control valve opens, most of the flow will go through the heater core. Then when the engine thermostat opens, even more flow will be sent to the engine cooling circuit. However, considering the small size of that hole, I think there is always more than enough flow to keep it fully supplied with all it can flow.
Thread Starter
|
Mountain Pass
Joined: Dec 2009
Posts: 229
Likes: 6
I'm letting my thoughts overload my brain but I wonder if the reason for the tiny outlet hose going back to the degass is so the filter won't overfill the degass. I did notice while doing a coolant flush the degass would take its time pulling down the coolant. After the flush is when I discovered casting sand and floating particles !!!!! I will not even drive my truck until I can figure out what to do about installing a filter !! I was going to order one but fabricating a higher flowing filter using a base off of a 18 wheeler and tapping into those two heater hoses came to mind. OVERKILL ? Probably but this should have been a priority for FORD since the first diesels came out in the 1980s !! I went thru a lot of water pumps on my 1985 6.9 632,000 mls.! I'm beggining to see why.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Yeah, you're over thinking it.
The very essence of a bypass filter is that it diverts a small amount of coolant through the filter, without ever compromising the proper funtion of the original system.
I think the Baldwin filter itself could use a little larger passage. I might do some comparison with the Napa product when I need filters. There is no way the hoses are a restriction. So don't worry about it.
The very essence of a bypass filter is that it diverts a small amount of coolant through the filter, without ever compromising the proper funtion of the original system.
I think the Baldwin filter itself could use a little larger passage. I might do some comparison with the Napa product when I need filters. There is no way the hoses are a restriction. So don't worry about it.