I need some suggestions to aid in keeping my new 5.4L SCrew cool. Live in Arizona 111 today, Robs some HP these summer months. Thinking of adding an electric fan has anyone done this? What were the results and what brand did you use? Are there any good aftermarket flex fans for the 5.4? What about a new thermo? Any manufactures and contact info would be much appreciated!

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2001 SuperCrew 4x4 Lariat "Loaded". Oxford White (No Stickers, Yuck!)
-Unique Alum. Wheels
-BFG 285 R16 ATs
-Billet Grill
-Stainless Werks Nerf Bars
-KC Driving Lights (in Grill)
-Airaid system
-Husky Mats, front & rear
-Husky Mud Flaps
-GPS (on board)
-Wired for phone (no accidents!)
-SnugTop, SnugLid Tonneau
-Killer Tint
To Come:
-Dual Exhuast, Flowmaster
-Poweraid kit
-Rancho RS 9000's & kit

 

Some things are easy, this might be one of them. Here are a few thoughts:

1) Invest in some quality synthetic fluids for the engine, tranny and rear differential. You'll notice some increases in power, smoother operation, and cooler temps.

2) Add some Redline Water Wetter, or some RMI-25 to your coolant. Either of these products will lower temps. This in addition to the 180F thermostat will help a bit.

3) There are many versions of fans out there and I'm not up to speed on them, but some I've heard do a great job of increasing airflow in the engine compartment. Anything, usually, is better than stock.

Just some thoughts,

Randy

 

I think a fan will make a huge difference. I'm currently searching for one, but am having trouble finding specific applications for our compartments. I suppose we have to be patient for now.

 

RandyW and Redbullsr:

Thanks for the replies I plan to go with synthetic engine oil next change. I do a lot of highway driving and only change every 5,000 or so. When to you recommend changing gear oil?

As for thermostat are you suggesting changing to a 180d? What is in the truck now?

Please let me know when you guys have some solid info on the fan. I think I definately want to go this way if for nothing else increased air flow to my airaid!

Looking for more responces!!!!

PS Water Wetter is great have used it in the past!!!

 

No problemo!! That's why we're here

If you tow a lot and with a heavy load (more than 3000 lbs) I would suggest changing the differential fluids right now!! I have been noticing a trend on the Ford-diesel page that the diff. fluids are breaking down much faster than Ford seems to think that they will.

I would think going to a bona-fide synthetic differential gear lube would fix the problem.
Some good choices are Amsoil, Mobil 1, Redline, and LE. You might have to do some investigation as to which product you need.

If you aren't towing alot or a heavy load, then its really up to you. You could change it out now and upgrade to a better fluid, but it may not be time.

When all else fails, check the book!!

Hope this helps,

Randy

 

RandyW:

Well, what about the daily drivers who tow maybe once a month? When should we change our differentials (miles intervals)?

Digodell:

What kind of truck are you driving?

Thanks

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1999 Red F150 4x4 5.4L XLT X-Cab
Towing Package
Corporate 9.75 Rear Axle, 3.55 Limited Slip
Corporate 8.8 Front Axle, 3.55 Open
K&N Generation II
Jet Chip
32x11.50 Super Swamper SSR
coming soon
Gibson Headers
40-Series Flomaster exhaust

 

Redbullsr,

From what I've seen most differential intervals are somewhere in the every 30,000 mile interval range. However, I haven't seen the owners manual of a F150 in some time. The F250-F350 folks are changing their fluid out of the diffs at as early as 15,000, but that's with heavy towing.

Because of what I've seen Ford put in these diffs. the fluid breaks down awful fast. If you only pull occasionally I would probably go to the 30,000 mile mark at the most and then change out the fluid. (might be a good time to invest in the Mag-Hytec cover too!!)
Some lubes out there offer a lifetime warranty for light applications, so you never have to drain the stuff again.

Randy