4.2 litre Ticking Question
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New User
Joined: Nov 2004
Posts: 2
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4.2 litre Ticking Question
I just purchased a 99 f150 with 99 thousand kilometers. All the maintenance receits are in the glovebox from day 1. The oil has been changed every 5000 k as recomended, however there is a tick in the engine that reminds me of a bent lifter. I know the previous owner and I know he would not have run the truck hard. Am I going in the wrong direction here or could the noise be something else?
Laughing Gas
Joined: Dec 2003
Posts: 751
Likes: 30
From: North Carolina
I also had a spark plug come loose, and it made the worst ticking sound. Let your truck cool, and then check the plugs by taking the wire's off one at a time, and gently try to wiggle the plug. Also, if there is a spark arcing somewhere, it will tick. Just unplug your underhood light, and raise the hood at night with the engine running. If there is a spark, you should be able to see it. Just some alternate ideas.
Junior User
Joined: Jul 2001
Posts: 81
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In response to the tick in your v6, I have a 99, and it has had the "tick" since I got it new. It sounds like an exhaust leak, it also sounds worse when your next to a brik wall or some area where theres an echo, I wish someone could explain what it is. 
Senior User
Joined: May 2004
Posts: 282
Likes: 0
From: B'ville, WV
Hag,
You may just have the same ticking noise that is common with this engine. Mine has done it since day 1 and now has 102,000 miles. It is the oil relief valve or oil pressure relief valve, can't remember exactly what it is called now. Do a search in the 4.2 forum. You'll find the question has come up before.
You may just have the same ticking noise that is common with this engine. Mine has done it since day 1 and now has 102,000 miles. It is the oil relief valve or oil pressure relief valve, can't remember exactly what it is called now. Do a search in the 4.2 forum. You'll find the question has come up before.
