Rattling, diesel noise when in motion

[Yupster Dog]

The exhaust guys *did* remove a heat shield from one of the converters they said was loose, but that didn’t solve it.

Ill crawl underneath tomorrow and investigate the mounts. Just looking for wear in the bushings, or did Ford do something weird with these?

Put a jack by the mounts and give a little lift. You will know if something is wrong. Also watch the exhaust manifold when you are doing lifts pipe end and engine side, could be broken or loose bolts that the exhaust guys could not see. If it is a exhaust leak you will eventually be able to see a darker spot where it is leaking.

some people run without those heat shields but i would put that back in. It was put there for a reason.(might even lead you to the problem)

 

[07navi]

Agreed, don't run it without heat shields. Noises can come from many places, it's just a process of elimination.

 

[Franklin Jones]

However, make 100% sure that you also don't encounter that rattling sound for a couple seconds after a cold start.

well, sh*t.

Very cold start up, and I *do* get a rattle for 2 seconds.
Turn it off, try again, no rattle.

I take it this is the chain tensioners?

 

[JExpedition07]

IWE solenoid and vacuum check valve likely causing the grinding, new IWEs will still engage when not supposed to with vacuum problems. Startup rattle means likely chain tensioners coming due.

 

[Franklin Jones]

Do a test drive with both VCT solenoids disconnected.

Test drive with both sensors disconnected, no change.

(Though the engine was definitely sluggish at low rpms.)

 

[The Wiped Cam]

well, sh*t.

Very cold start up, and I *do* get a rattle for 2 seconds.
Turn it off, try again, no rattle.

I take it this is the chain tensioners?

Test drive with both sensors disconnected, no change.

(Though the engine was definitely sluggish at low rpms.)

Congratulations, sir. Your life just got a little more interesting Startup rattle is an extremely bad sign on this particular motor. Could you pay a couple dollars to a pro to properly diagnose that as a startup chain rattle? If it is a busted tensioner causing this, then your motor has just turned into its own lunch. A 5.4 3v with a bad tensioner should be parked right away until you have the funding ready to undertake parts replacement.

Summary: if you have a startup chain rattle, your 5.4 3v will begin to eat itself soon.

BTW: Could you post a video or a soundbite of the rattle you're hearing while driving? IWE replacement on factory installed hubs can have unusual results, mostly pertaining to the axle support needle bearings. This failure mode has nothing to do with startup rattle though.

 

[07navi]

Congratulations, sir. Your life just got a little more interesting Startup rattle is an extremely bad sign on this particular motor. Could you pay a couple dollars to a pro to properly diagnose that as a startup chain rattle? If it is a busted tensioner causing this, then your motor has just turned into its own lunch. A 5.4 3v with a bad tensioner should be parked right away until you have the funding ready to undertake parts replacement.

Summary: if you have a startup chain rattle, your 5.4 3v will begin to eat itself soon.

BTW: Could you post a video or a soundbite of the rattle you're hearing while driving? IWE replacement on factory installed hubs can have unusual results, mostly pertaining to the axle support needle bearings. This failure mode has nothing to do with startup rattle though.

It depends on the rattle, if it just rattles for 3 seconds it could go on like that for a very long time as the tensioner quickly regains it's composure and it all returns to normal. They don't always totally collapse and suck up your oil pressure.

 

[07navi]

well, sh*t.

Very cold start up, and I *do* get a rattle for 2 seconds.
Turn it off, try again, no rattle.

I take it this is the chain tensioners?

Yes and the second time you started it the tensioner had already filled with oil and was acting normal. Some take overnight or longer to drain down.

 

[Boostedbus]

It’s also worse when the engine is warm.

It does not do it at idle - idle sounds GREAT.

It does not do it in park, no matter the RPMs.

Doesn’t the symptoms quoted above rule out chain tensioners? If I’m understanding correctly, this rattle only occurs when the vehicle is moving.

 

[Franklin Jones]

Alright folx- here’s the sound.

It REALLY sounds like a rasping exhaust, and please ignore the slaps of the joints in the road.

(And also forgive the shaky video. I’m trying to record the sound and drive at the same time. )