Coolant flow direction for Coyote?

[tcollins]

I'm plumbing a Vintage Air heater in my hot rod and I'm not sure which direction the coolant flows from the heater hose ports. This is needed for placement of the heater control valve that comes with the Vintage Air unit. Does anyone know?

16246

[TomZ 33]

On the tube that you have the arrow on - the flow is from the heater core to the water pump. Check on the Ford Racing site - go to the Crate Engine page and load the page for the Aluminator NA - on that page, down toward the bottom of the page is a very good instruction manual for the Coyote engine. Complete flow diagram, engine oil system priming procedure, torque spec's etc. Try this link:
http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-6007-A50NA.pdf

[bansheekev]

Passenger side hose hose flows to the heater core and the drivers side hose is the return.

Keep in mind that the Coyote expects continuous flow through the heater core path which means the cutoff valve supplied with the FFR Vintage Air heater won't work as it is a one-way on-off valve and will stop the flow. Some are omitting the shutoff valve all together and letting the coolant flow though the heater core all the time and others are using a bypass valve (allowing the coolant to flow but bypass the heater core). I'm going the bypass route but haven't sourced the bypass valve yet. I have read that one from a mid-90's Ford Ranger pickup works well. Search the site and you will find references to it...

Kevin

[tcoon]

I'm not sure why you say the Coyote expects continuous flow...if you don't hook up a heater at all and just plug off the ports, there is no flow either and that doesn't appear to be a problem? Educate me!

[TomZ 33]

From the Aluminator instruction sheet noted above "If a heater circuit is not used then the heater supply must be connected to the heater return to allow air to
be purged from the right hand cylinder head and provide sufficient coolant flow through the right hand cylinder head. Install a 5/16" (0.3125) diameter restrictor in this hose." That would be why you don't want to just plug the heater hoses off!

[tcollins]

Thanks...very helpful!

[bansheekev]

What Tomz 33 said... Used for head cooling.


From the Aluminator instruction sheet noted above "If a heater circuit is not used then the heater supply must be connected to the heater return to allow air to
be purged from the right hand cylinder head and provide sufficient coolant flow through the right hand cylinder head. Install a 5/16" (0.3125) diameter restrictor in this hose." That would be why you don't want to just plug the heater hoses off!

[teesalmon]

It seems to me that you could install a tee right at the heater outlet on the passenger side, then run the heater bypass hose with the restrictor to the lower tee'd section on the metal heater inlet on the driver's side head. Thoughts? My Coyote is still in the box, so there may not be enough space to do what I suggested. However, I am really glad I read this since the FFR instructions don't mention this. I am also wondering if a properly bled system really needs this or if this is just protection to prevent an air pocket getting stuck in the head. I know Ford uses the pressurized coolant bottles to help remove air en-trained in the coolant. They are sometimes called de-gas bottles. Never-the-less, I think I will make sure coolant can flow from one head to the other with the proper orifice in one way or another. Thanks for pointing this out, I probably would have missed it.

[DaleG]

Discussed many time is the past. I wanted to be sure, so installed this: http://www.oldairproducts.com/catalog/advanced_search_result.php?keywords=50-1555&osCsid=52182fbdc71a58ac9d5fb87565845920&x=33&y=14

You will need some fancy hose bends, but they are available from many sources.