99 ford explorer 5.0 engine noise
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New User
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99 ford explorer 5.0 engine noise
Hello folks. I have a 99 explorer xlt 5.0. I noticed a few months ago that on startup the engine is
making a valve-like ticking noise .its pretty loud and didn't do this before. sounds like its comming from the passenger side of the engine.
Now when it warms up it almost goes away completely. I have changed the oil and filter with no
change. What do you think?
thanks
making a valve-like ticking noise .its pretty loud and didn't do this before. sounds like its comming from the passenger side of the engine.
Now when it warms up it almost goes away completely. I have changed the oil and filter with no
change. What do you think?
thanks
Mountain Pass
Joined: Jun 2006
Posts: 230
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My 1997 MM 5.0L with 103K miles has developed a similar noise. Actually, it sounds like one of those old exhaust manifold temperature risers going bad (remember those?). They don't have on of those things hidden in there somewhere do they?
Logistics Pro
Joined: Jan 2001
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From: Fort Smith
The Explorers and Mountaineers with the 302's have been known to develop a passenger side exhaust manifold leak. That was going to be the next thing I asked about, but went with the valve cover first because if a gasket is bad, cover is loose, etc, once heat and pressure is built up, it could be sealing his problem (reason the noise is going away once the engine heats up).
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thanks
thanks for the responses guys. I have not noticed any leaks and it doesn't seem to use any oil.
I have in the past replaced the spark plugs and wires and noticed the nuts being loose on the
exhaust manifold on that side. I will recheck that and also check the valve cover. This valve
noise I'm hearing I thought might be and exhaust leak but my thoughts were would an
exhaust leak quiet down after it warms up? If I find out whats up I will let you guys know.
I have in the past replaced the spark plugs and wires and noticed the nuts being loose on the
exhaust manifold on that side. I will recheck that and also check the valve cover. This valve
noise I'm hearing I thought might be and exhaust leak but my thoughts were would an
exhaust leak quiet down after it warms up? If I find out whats up I will let you guys know.
Mountain Pass
Joined: Jun 2006
Posts: 230
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I don't have any signs of an oil leak around the valve covers either so I will check my exhaust manifolds for leakage also (as soon as the temp gets above 40 and stays that way for a couple of days). Hmmm, that rise in temperature may be a few days away according to the weatherman. I'm just a big sissy when it comes down to standing outside in sub-freezing weather.
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Elder User
Joined: May 2004
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From: Webster, NY
my Mountaineer used to do that... as CobraXP mentioned above, the 5.0L in these things are real prone to an exhaust leak in the passenger side manifold. When mine was replaced the ticking sound went with it (it was replaced due to rust elsewhere). The ticking would usually stop after the engine warmed up.
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Elder User
Joined: May 2004
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From: Webster, NY
In my case I opted to go OEM... time was critical and I did not want to do both sides... I payed and arm and a leg for the work... but these 5.0s are so tighly packed in there that for a home mechanic (actually a parking lot mechanic as I did not have a garage back then) it was beyond what I wanted to undertake. Now that I have a garage I might have considered doing it myself... but only after asking around to see how hard it might be to do. As I said, those 5.0s are packed in there real tight!
Logistics Pro
Joined: Jan 2001
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From: Fort Smith
If you have the opportunity and need to replace manifolds, I suggest changing to the FMS headers or the Torque Monsters. I would recommend TM's twice as much and three times on Sunday over the FMS's, but both are better than stock.
The 302 is form fitted the the Explorer. I always said they made a jello mold of the engine compartment and made things to fit from there. The headers are fun to install, but they are not so bad a person with 'normal' mechanical skills can't do. The first time I changed to FMS headers, it took me roughly 12 hours. I changed to the Torque Monsters last summer and it took me 4 hours and some change to swap from FMS's to the TM's.
The 302 is form fitted the the Explorer. I always said they made a jello mold of the engine compartment and made things to fit from there. The headers are fun to install, but they are not so bad a person with 'normal' mechanical skills can't do. The first time I changed to FMS headers, it took me roughly 12 hours. I changed to the Torque Monsters last summer and it took me 4 hours and some change to swap from FMS's to the TM's.