Marbling 4.0
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Joined: Dec 2003
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Marbling 4.0
Ok, so I bought a 99 xlt 4x4 with the 4.0. It runs great but it does have the marbly sound at idle. Other than being a little noisy, does this present any serious problems? What causes it, something in the valve train I would guess.
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Joined: Jul 2002
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Welcome to the club. It sucks, but everyone says it won't hurt anything. It is embarassing though when you pull into a parking lot and everyone turns their head with a raised eyebrow 
It doesn't do it all of the time, but MAN is it loud sometimes.
It doesn't do it all of the time, but MAN is it loud sometimes.
Posting Guru
Joined: Sep 2003
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From: Dixie - Tennessee
My dad's 2000 4.0L made the same noise.He stopped buying cheap-o 87 octane and started buying it at BP.It doesn't make any noises now.Just a smooth running engine.I just thought that I'd let you guys know that it helped his.It might be worth a try.
Nightrain
Nightrain
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Joined: Jan 2003
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From: Durham, NC
Originally posted by Nightrain
My dad's 2000 4.0L made the same noise.He stopped buying cheap-o 87 octane and started buying it at BP.It doesn't make any noises now.Just a smooth running engine.I just thought that I'd let you guys know that it helped his.It might be worth a try.
Nightrain
My dad's 2000 4.0L made the same noise.He stopped buying cheap-o 87 octane and started buying it at BP.It doesn't make any noises now.Just a smooth running engine.I just thought that I'd let you guys know that it helped his.It might be worth a try.
Nightrain
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Joined: Nov 2001
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From: Los Gatos USA
Oh hi,
Yes the marbling seems to happen under very low load, like when coasting or lightly accelerating down a hill (as well as at idle). When I apply power it goes away.
Glen
99 ranger
01 f250 SD
Yes the marbling seems to happen under very low load, like when coasting or lightly accelerating down a hill (as well as at idle). When I apply power it goes away.
Glen
99 ranger
01 f250 SD
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Joined: Nov 2003
Posts: 36
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I have been trying to figure this one out...
I have 2 maybe answers
1) A brick is loose in the cat and until the cat heats up
the brick gives off a marble ping sound.
2) Someone told me the torque converter is trying
to disengage and can not due to being gummed up...
I will investigate further this Spring ... Too cold here to
work on it in the driveway!
I have 2 maybe answers
1) A brick is loose in the cat and until the cat heats up
the brick gives off a marble ping sound.
2) Someone told me the torque converter is trying
to disengage and can not due to being gummed up...
I will investigate further this Spring ... Too cold here to
work on it in the driveway!
