2003 tune up
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Cross-Country
Joined: Feb 2018
Posts: 72
Likes: 26
From: Tomahawk
2003 tune up
My 2003 F150 is approaching 100,000 miles. Runs great, has the 5.4 in it. Thinking about getting the old girl a tune up. New plugs, wires, fuel filter, change transmission fluid, new belt, change antifreeze. What else? I plan on keeping her and getting another 100,000. Any thought's ? Thanks ! 
More Turbo
Joined: Sep 2017
Posts: 573
Likes: 145
Check the owner's manual for stuff to do at 100,000. i am thinking the PCV valve is due to be replaced. Air filter if it hasn't been done recently. If your going to do the coolant, check your hoses and maybe the water pump and thermostat. but those are optional.
Hotshot
Joined: Jul 2020
Posts: 10,331
Likes: 2,585
From: Near Salt Lake City
All the fluids
All the filters
Give it a 30k service
Lube all the door hinges and window tracks lube drivelines if applicable
Bunch of inspections
Do everything in the owners manual +
All the filters
Give it a 30k service
Lube all the door hinges and window tracks lube drivelines if applicable
Bunch of inspections
Do everything in the owners manual +
Cargo Master
Joined: Dec 2015
Posts: 2,911
Likes: 504
Excellent point, if OP wants to be proactive just do the intake manifold replacement before it starts leaking coolant.
Tuned
Joined: Jan 2012
Posts: 292
Likes: 25
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Cross-Country
Joined: Jun 2019
Posts: 95
Likes: 34
From: Southern Alberta
I like to clean the mass air flow sensor every once and a while with the appropriate cleaner. Also check the throttle body for cleanliness but if you do need to clean it do your research on the protective coating, I just use a dry shop towel and be gentile.
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Lead Driver
Joined: Sep 2002
Posts: 9,495
Likes: 2,019
From: North Texas
Idler pulley, tensioner, and verify the fan clutch still works well. Maybe voltage regulator brushes, they run about $6.
I am not a fan of 20 year old plastic end tank radiators, I would swap if in budget. The dual row one from an Expedition drops in and is what is in my '01 Screw.
I am not a fan of 20 year old plastic end tank radiators, I would swap if in budget. The dual row one from an Expedition drops in and is what is in my '01 Screw.
Laughing Gas
Joined: Sep 2013
Posts: 1,112
Likes: 101
From: North Idaho
I was able to use a pair of Vice Grips to crimp my radiator back together on my 2000 F-150. It hasn't leaked in the years since.
If I could find one of these trucks with low miles I'd go get a loan and buy it! 300,000+ miles on mine.
If I could find one of these trucks with low miles I'd go get a loan and buy it! 300,000+ miles on mine.
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Nightrain
1987 - 1996 F150 & Larger F-Series Trucks
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Jun 29, 2004 09:10 AM