Radiator Cap

Reply Subscribe

Thread Tools

Search this Thread

Aug 8, 2015 | 08:24 PM

troy676

Thread Starter

Mountain Pass

Joined: Mar 2012

Posts: 161

Likes: 0

Radiator Cap

I've read here that ford has a 20lb psi cap for the 6 liter.....true... false? would you know the part#?

Thanks

Aug 9, 2015 | 08:29 AM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 59

False. 16 psi cap. 9C3Z-8101-A

Josh

Aug 9, 2015 | 08:37 AM

troy676

Thread Starter

Mountain Pass

Joined: Mar 2012

Posts: 161

Likes: 0

OK..Thanks again

Aug 9, 2015 | 08:46 AM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

Likes: 25

From: Middle Tn.

They redesigned the cap in 2007 but didn't change the psi rating.

Aug 9, 2015 | 12:39 PM

troy676

Thread Starter

Mountain Pass

Joined: Mar 2012

Posts: 161

Likes: 0

Had any experience with the Mishimoto Low Temperature Thermostat?? This 6 liter of mine seems really sensitive to heat. and with heat you have more pressure in the cooling system. So i'm tying to keep this thing as cool as possible. I've done gaskets and studs.

Thanks

Aug 9, 2015 | 12:50 PM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

Likes: 25

From: Middle Tn.

Ideal would be between 196 and 205. Diesels don't have spark plugs and rely on compression and heat to fire. They are very inefficient when run too cold. The 180's is too cold.

Aug 9, 2015 | 06:40 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 59

Quote:

Originally Posted by 69cj

Ideal would be between 196 and 205. Diesels don't have spark plugs and rely on compression and heat to fire. They are very inefficient when run too cold. The 180's is too cold.

I agree. My 6.0 is way happier at 199-201 than 190. I have been fairly pleased with my Mishimoto 200 t-stat.

As for the OP, what do you mean heat sensitive? Is it puking coolant on the regular?

Josh

Top 10 Ford Truck Tragedies

Joe Kucinski

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

Aug 9, 2015 | 09:31 PM

bismic

Fleet Owner

Joined: Nov 2003

Posts: 27,881

Likes: 3,595

Personally I have had no issues w/ the OEM degas bottle cap.

Aug 9, 2015 | 10:57 PM

#10

78fordman

Cargo Master

Joined: Oct 2003

Posts: 2,833

Likes: 4

From: Jefferson, Iowa

Radiator Cap

Quote:

Originally Posted by Bullitt390

How does it do towing? Does it raise everything 10 degrees or not really anything?
I have the updated cap without any issue.

Aug 12, 2015 | 07:31 PM

#11

troy676

Thread Starter

Mountain Pass

Joined: Mar 2012

Posts: 161

Likes: 0

driving the truck by itself. Pressure would go to 8psi with my empty enclosed trailer it goes to 11 psi. temp truck alone is 190 with trailer 204. on level ground. I just replaced the rad, I bleed the air out of it, put the cap on and drove it hard and it developed only 1 psi. What does that mean?? It has never puked out the bottle. and I just did gaskets and studs.

Thanks