Blubbing noise when idling

[Denzil]

Hi guys

I recently performed an Italian tune up on my Mk 1 Leon Tdi FR 150, and now when it's idling it is making a blub blub blub noise. It sounds like a Subaru Impreza.

It's never sounded like this before. It drives exactly the same, but I'm worried something may have broke or popped off.

Any ideas?

 

[Thai-wronghorse]

Is it smoking excessively?

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[Denzil]

No more than usual.

 

[sockpuppet]

Is it a blowing sound like a blown exhaust? I had that sound when the camshaft wore a hole in one of the lifters.

 

[Thai-wronghorse]

Camshaft was my initial thought.
Can you get a video/ audio clip of under the bonnet when it's running.

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[Rich-I-Am]

Whats an Italian tune up?

 

[Thai-wronghorse]

An Italian tuneup usually refers to a process whereby a motor vehicle engine is run at full load for extended periods in order to burn carbon buildup from the combustion chambers and exhaust system.

 

[Denzil]

The cam is on its way out.

 

[Denzil]

Hi guys

Just for info, it was the camshaft that needed replacing.

If you suspect yours is on its way out, a good way to diagnose it is to stick it in neutral and give it some high revs. The clattering noise will be more noticeable when the revs drop.