Coyote coolant fill

[Rian_Colorado]

Hello all - it's ALMOST that time!

I'm running a gen3 coyote with the Moroso expansion tank setup (check valve installed etc). I went to fill everything up yesterday, but he system only took a little more thank two gallons of coolant. I was expecting it to take nearly 4 as others have mentioned. I filled the system via the upper heater hose port on the DS of the motor. Once it was full I had coolant coming from the hose itself as well as overflowing from the port. I have the entire car sitting level on the ground.

I'm assuming that I have air in the system, and that the coolant isn't being able to get past air somewhere. (ie - I need to burp the system somehow).

Can anyone provide some input on how one gets the remaining coolant into the system?

Thanks
Rian

[egchewy79]

what port are you referring to?
if the thermostat is closed, by filling the heater hose, you're only getting coolant into the intake/block, water pump, but nothing into the radiator.
if you have a filler neck on a T piece, fill from this and open the petcock on the top of the radiator to get coolant into the radiator and lower return hose. stop when fluid starts coming out of the upper radiator petcock. close the petcock and continue to fill until fluid comes out of the filler neck.

[JohnK]

If you've plumbed the coyote using the OEM-style cooling circuit and Moroso tank, you should be able to fill it from the Moroso tank.

[edwardb]

X2. Fill from the Moroso tank. Get as much in as you can. The system is self-burping. So run it through several heat cycles checking the coolant level each time. You should be able to add if it's not filled. Continue to keep an eye on it once you start driving. It will stabilize and be fine.

[Rian_Colorado]

175066

This is the port that I'm filling from (note - picture is from prior to radiator install - full system is installed now)

I began filling with the Moroso tank, but that filled after about 1 gallon. The Moroso tank is ultimately lower than other parts of the system (installed in similar location to others (ie Paul and many more). That didn't surprise me, so then moved to the upper heater hose connection to fill remaining.

I can tell that the radiator has fluid in it, as squeezing both the upper and lower radiator hoses causes the fluid to rise in the tube. With the Moroso tank, you eliminate the upper radiator petcock and install a hose back to the expansion tank (hence can't open that port)

The thermostat being open/closed makes sense to me - but how to open? It's controlled by the ECU....

Rian

[Rian_Colorado]

Thanks Paul - I was thinking that I might really need the motor running in order to fill the remaining. Wanted to get some fluid in it prior to operating. Should probably be fine until the pump is running and the thermostat opens - the I should be able to add the rest of the coolant...

RR

[Alan_C]

For reference, see post #3 which has the refill procedure for the 4.6L DOHC. Although you do not have the crossover tube, most of the procedure should apply. Raising the front wheels helped when filling, may help with the Coyote too. I have a 2nd Gen Coyote going into another project and plan you use the procedure as a reference.

https://thefactoryfiveforum.com/showthread.php?36870-4-6L-Crossover-tube-bolt&highlight=refill+procedure

[edwardb]

175066

This is the port that I'm filling from (note - picture is from prior to radiator install - full system is installed now)

I began filling with the Moroso tank, but that filled after about 1 gallon. The Moroso tank is ultimately lower than other parts of the system (installed in similar location to others (ie Paul and many more). That didn't surprise me, so then moved to the upper heater hose connection to fill remaining.

I can tell that the radiator has fluid in it, as squeezing both the upper and lower radiator hoses causes the fluid to rise in the tube. With the Moroso tank, you eliminate the upper radiator petcock and install a hose back to the expansion tank (hence can't open that port)

The thermostat being open/closed makes sense to me - but how to open? It's controlled by the ECU....

Rian


Thanks Paul - I was thinking that I might really need the motor running in order to fill the remaining. Wanted to get some fluid in it prior to operating. Should probably be fine until the pump is running and the thermostat opens - the I should be able to add the rest of the coolant...

RR

Kind of wondered if you had the lowered tank installation when I made my original post. You're doing exactly what I did. Fill as much as you can through the Moroso tank. Then as much as you can through the LH heater hose connection. Then cycle the engine through several full temp runs and keep topping off the Moroso tank. Well, within about 1" of the top. That's where I keep mine. You should end up with about 15 quarts total. There was a lot of debate about the lower location for the Moroso tank in my Coupe build thread. Some said it would be OK, others said don't do it. I can say after three seasons and nearly 6,000 miles, it's fine. Engine temp in the Coyote is well controlled and it's never been an issue. BTW, the thermostat technically isn't controlled by the ECU. It's a typical mechanical piece like they've been for years. Motorcraft BR3Z8575D. 190 degree. The ECU controls the cooling fan and the thermostat opens/closes based on coolant temp.

[Jryasko]

Tip on filling the Gen 3 Coyote in a Roadster. If plumbed like OEM with the Moroso tank leave the small hose ( with check valve ) off the radiator stem to fill. This will allow the radiator and entire engine to fill. You should end up with a 4 gal fill. Then start and run through a couple heat cool cycles as suggested and check tank. I figured this out after a couple fill and drains. 1 other tip if the tank is not installed yet, I had a friend weld in 2 alum bosses with NPT threads to install 2 sight glasses on the tank to make it easier to check. As Paul said the Control Pack ECM controls the cooling fan perfectly on the Gen 3.