Start up rattle
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Junior User
Joined: Aug 2004
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Thanks jimw411. A friend of mine is doing what you suggest, but I was a little hesitant. I guess I needed a second opinion.
The owners manual calls for 5W-30 in a 4.0, next time I will try 5W-20 and see what it does.
The owners manual calls for 5W-30 in a 4.0, next time I will try 5W-20 and see what it does.
Elder User
Joined: Nov 2004
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From: Ventura ,ca. (near L.A.)
i'm surprised it calls for the 5w30, i thought all the 03's and newer took 5w20, my cousin has a 03 f-150 with a 5.4 and it even calls for the 5w20. You may want to make sure it's full of oil too. The chatter is sometimes related to being low on oil. You truck probably takes around 5 quarts for an oil change. Let me know what happens.
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Junior User
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I was suprised too! Even my 2001 Windstars 3.8 calls for 5W-20, but according to the owners manual (and I'm going to double check when I get home) the 4.0 is the only one that calls for 5W-30. The others (3.0 and whatever the 4 cylinder is) call for 5W-20.
Anyway, as soon as I get the chance I'm going to change the oil and see what kind of difference it makes. I don't think it's going to hurt the motor anytime soon but it still bothers me.
Anyway, as soon as I get the chance I'm going to change the oil and see what kind of difference it makes. I don't think it's going to hurt the motor anytime soon but it still bothers me.
Elder User
Joined: Nov 2004
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From: Ventura ,ca. (near L.A.)
Thats a good point ken, arent those OHC with a really long chain? i think he only has the problem at start-up though.
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Laughing Gas
Joined: Apr 2004
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From: Northern Maine
How many miles on it? Rod bearings can also rattle on a start up. For the most part, Lifters clatter or snap with a higher pitched sound. Rod bearings rattle or knock with a lower pitched sound. Both only last a second or two, while your oil pressure builds (longer when it is below zero outside)
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Junior User
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Just bought the truck a little over a month ago. It has 19K on it. It's fairly warm (80's to 90's) here. It doesn't rattle everytime I start it. Just from time to time, especially if it sits for a day or two.
Laughing Gas
Joined: Apr 2004
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From: Northern Maine
Bearings should not wear enough at 19K to hear them. My vote is that you have a valve train problem, most likely the lifters and that your next move would be to do what the others have suggested and try a different viscosity. I have a 2004 Explorer 4.0 that makes a lot of valve train noise upon start up if I dont fill the oil filter first. Good luck.
New User
Joined: Jan 2006
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My 2004 Explorer does the same thing at start up after it's been sitting overnight. It's been like that since just after the warranty ran out. I've tried different oil filters(Fram, Motorcraft, SuperTech, Purolator) all do the same thing. It's definitely lubrication related. If I remove the starter relay, crank the engine by jumping the contacts without having the ignition on for a few seconds, letting oil press. build up, and then reinstall the relay and start the engine normally. There is no noise. I think the oil is draining back out of the heads after the engine has been shut down over a certain period of time. The only fix I can think of is to install a preoiler to build oil pressure before the engine is cranked.