4.0L clicking
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Cargo Master
Joined: Aug 2002
Posts: 2,117
Likes: 8
From: Over Yonder, MN
4.0L clicking
Hi everyone, i have a friend with a 4.0L V-6 in a 93XLT explorer with about 120000 miles on it and it has started to make a loud clicking around the passengr side valve cover only when its put into drive or under a load sounds fine in park even if you rev it only under a load, it does it at any speed, if you have any ideas please help i want to help him out before it becomes any bigger of a problem as he doesent have alot of money for this kinda thing. THANKS
96 Bronco, Eddie Bauer, 351w, auto
96 Bronco, Eddie Bauer, 351w, auto
Senior User
Joined: Oct 2002
Posts: 286
Likes: 0
From: USA
4.0L clicking
He might try flushing the engine, and getting some fresh oil and filter. Here's a flush I just did on one of my vehicles that has 100k miles on it(not an 4.0). I drained the existing oil but left the filter in, and put in fresh and cheap 5W30 oil (3 quarts). I then added about a quart of ATF and let it idle for around 15 minutes, reving it up now and then (this should help clean out some deposits). Then I drained the oil again, and added an K&N High Performance Oil Filter ($10), and Mobile 1 5W30 (You probably want to use 10W30). Last I replaced the air filter. The car is now quiet as can be and has noticeably more power.
Good Luck.
Good Luck.
Senior User
Joined: Dec 2002
Posts: 282
Likes: 0
From: USA
4.0L clicking
>Hi everyone, i have a friend with a 4.0L V-6 in a 93XLT
>explorer with about 120000 miles on it and it has started to
>make a loud clicking around the passengr side valve cover
>only when its put into drive or under a load sounds fine in
>park even if you rev it only under a load, it does it at any
>speed, if you have any ideas please help i want to help him
>out before it becomes any bigger of a problem as he doesent
>have alot of money for this kinda thing. THANKS
>
>96 Bronco, Eddie Bauer, 351w, auto
Could be a worn push-rod. I have read one article that indicates some 4.0 litre's may suffer from high wear at the pushrod/rocker contact area.
-Larry
>explorer with about 120000 miles on it and it has started to
>make a loud clicking around the passengr side valve cover
>only when its put into drive or under a load sounds fine in
>park even if you rev it only under a load, it does it at any
>speed, if you have any ideas please help i want to help him
>out before it becomes any bigger of a problem as he doesent
>have alot of money for this kinda thing. THANKS
>
>96 Bronco, Eddie Bauer, 351w, auto
Could be a worn push-rod. I have read one article that indicates some 4.0 litre's may suffer from high wear at the pushrod/rocker contact area.
-Larry
Senior User
Joined: Dec 2002
Posts: 290
Likes: 0
From: morristown usa
4.0L clicking
my 2.9 b2 does this aswell. not mention the truck is shot. personnaly ive herd that it could be pushrods cam lifters bad valve adjustment ect. i dont know what causing it and the truck goes for sale soon (after i swap the trans in my tempo) and it wont be my prob then. although im curius to know what it is.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
4.0L clicking
I've got a 92 exploder that does something similar to that. Mine makes a muffled knock under load, I think its piston slap. If yours is the same it could be piston slap. If it was in the valvetrain, it would do it all the time. I also had an exhaust manifold gasket blow out on mine, that made exactly the sound you describe, only under load. Something else to think about would be a head gasket. Hope I didn't confuse you too much. Good luck!
Senior User
Joined: Nov 2002
Posts: 164
Likes: 0
From: Seattle USA
4.0L clicking
Rule out the Head Gasket by checking the oil hot. Is it milky? Nope, didn't think so. Exhaust manifold Gasket? Okay, probably not, but start the car and check anyway. It will be a ticking noise and you'll feel warm air come out wherever the crack is. Valve train. Now we're getting somewhere. Sorry to say it but valve train will make more noise (when cold) under a load, and when warmed up it may not make any noise at an idle. So, use a stethescope and listed to the passenger side valve cover. I have had cars that did this and changing the lifters (simple project) solved it. Cheap and easy. Don't go ripping your car apart trying to replace every little thing. Get the right tools and make an educated guess.
Good luck.
Good luck.
