What does this noise sound like?

[SkylabTech86IDI]

Sounds to me like I have a valve train noise. I want to say I’ve heard this noise before in a video and it turned out to be an exhaust valve guide or something similar. Likely wrong.

My guess is a loose rocker arm is being noisy against a push rod and they’re slapping into one another

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[SkylabTech86IDI]

Coming from the drivers side

 

[SkylabTech86IDI]

Either way gonna have to pop the cover off to take a look.

 

[Nero]

That sounds like a noisy diesel bruv.

But yeah sounds like a rocker tap. Hopefully it's not a cam follower that's not pumping up.

 

[Austin86250]

I agree sounds like what would be loose valves unfortunately there not adjustable

 

[david85]

Hard to tell on the video, but I think I can I hear just the slightest tink tink tink tink...

Not a knock, but a slight metallic tapping.

 

[SkylabTech86IDI]

Hard to tell on the video, but I think I can I hear just the slightest tink tink tink tink...

Not a knock, but a slight metallic tapping.

Yup, that’s the noise that I’m referring to. It’s a metallic tink.

Is it safe to drive it like this or should I take it apart sooner than later?

 

[david85]

To be honest with you I'm not entirely sure. Mine may have just started doing this intermittently. From what I hear, the rocker arms mounts are prone to wearing prematurely, so I may try replacing them all with 7.3 style.

 

[Rdnck84_03]

Is it safe to drive it like this or should I take it apart sooner than later?

I don't have enough service to watch the video until I get to town later. If is a lifter collapsing that could be a hard question to answer.

I have seen them go for years without getting any worse, I have also seen them make it less than a minute before complete valvetrain carnage.

 

[hacked89]

Run it with the driver side valve cover off to observe.

 

[Old Goat]

Not till you get to the front of the engine do I hear the tink tink tink metallic sound.
I hear that on mine in the front also, but very faint.

Interesting to see hat you come up with.


Goat

 

[SkylabTech86IDI]

Took the f250 out for another drive today, took about 3 good sessions of cranking using glowplugs and pedal pressed to the floor. Cranked longer than I should have on the 3rd round but it kept trying to fire. It continued to pull fuel from the rear tank the whole time.

Here’s another video where I think the metallic tink tink is very audible.

I have a stethoscope and used it around the injectors, areas on the block and on the valve cover. Didn’t hear anything like the noise that I’m hearing in their video.

It only comes when it’s warm at operating temperature

 

[Rdnck84_03]

It only comes when it’s warm at operating temperature

When the oil gets warm and thins down it could allow it past a bad lifter seal more easily.

A stethoscope can be a handy tool on a gasser but I would think it would be hard to differentiate what your hearing on an idi.

James

 

[IDIBRONCO]

A stethoscope can be a handy tool on a gasser but I would think it would be hard to differentiate what your hearing on an idi.

It's not as bad as you think. They work great on a IDI too.

 

[silverrex4]

Had same issue and posted. Turned out to be 1 blown lifter and 3 or 4 bad lifters with the retainers starting to fail. Take the rockers off and push rods and send a camera down and see if the lifter retainer is starting to come apart. Check out my photos, and you can see. It's the loud thump from intake that turned into light tap to eventually "Its a problem" lol keep us posted. Could be easy fix before thinking the worst.