2.2 Hdi Become A Bit Rattly

[72dudes]

Hi All, (2001 2.2 HDi manual)

 

Opinions and advice please. Last few months have noticed the engine is sounding more rattly than usual:

 

Especially noticeable in first and second gears at light throttle openings, typically around 2000 RPM. (e.g. crawling around town). I would describe the noise as "tappety" if this was a petrol engine.

 

It goes off on wider throttle openings, but it is present at idle. Goes off if I apply light pressure to the throttle and increase revs to say 900 RPM from idle.

 

Oil temperature is not relevant as the noise is there whether engine is cold or hot. No additional vibration and average fuel consumption is steady at 44 MPG. Obviously no warning lights showing.

 

Last serviced in September by my normal indy specialist - no other faults.

 

Car has only done just under 70k so should be silky smooth still.

 

Any ideas or pointers?

[coastline taxis]

Without standing over the engine it Could be anything loose so would start by checking everything under engine bay is secure also heat shield on exhaust and the ***oops*** tray underneath. just a daft one but does it go off when you press the clutch

[Guest digitalinkjetman]

Without standing over the engine it Could be anything loose so would start by checking everything under engine bay is secure also heat shield on exhaust and the ***oops*** tray underneath. just a daft one but does it go off when you press the clutch

 

 

The exhaust heat shield on mine rattles just at the same rev range you are saying.

 

Ive been under there so many times trying to stop it, Im just going to remove it now when the weather is good enough!!

[72dudes]

Coastline: Thanks. No difference when clutch is depressed. Nothing obviously loose in engine bay.

 

Digitalinkjetman: Where would I find the exhaust heat shield - easy to get to for a complete non-mechanic?

 

I'd say the rattle is coming from the top of the engine towards the back. Could it be a lazy or worn valve?