V70: Engine '13 V70 D5 - Ticking noise on start-up

[GMC]

Some advice please;

First noticed a couple of months ago, mainly because the window was down (summer), a very slight ticking noise when the engine started, usually disappears within a few hundred yards / half mile max.

Being honest, I didn't think anything of it but its now gradually getting louder - a high pitched metallic ticking noise, that increases speed with engine revs, it still disappears after a short distance.

Popped the bonnet, sounds to me as though its coming from the pulley area or possibly the alternator, AC pump, PS pump?

Full Volvo timing belt kit & aux pulleys & belts fitted approx 10,000mls ago.

Car is coming up on 103,000miles.

Just wondering if its anything common that anyone is aware of?

Thanks

[tommyweaves]

I'm probably stating the obvious, but the symptoms you describe are typical of hydraulic tappets building up oil pressure?

[GMC]

Thanks for that, but its not the tappets. Definitely from the RHS end of the engine. Definitely pulley/ or pump/alternator related.

Planning to disconnect the Aux belts & check every item that spins, lol

[seanc]

Originally Posted by GMC

Some advice please;

First noticed a couple of months ago, mainly because the window was down (summer), a very slight ticking noise when the engine started, usually disappears within a few hundred yards / half mile max.

Being honest, I didn't think anything of it but its now gradually getting louder - a high pitched metallic ticking noise, that increases speed with engine revs, it still disappears after a short distance.

Popped the bonnet, sounds to me as though its coming from the pulley area or possibly the alternator, AC pump, PS pump?

Full Volvo timing belt kit & aux pulleys & belts fitted approx 10,000mls ago.

Car is coming up on 103,000miles.

Just wondering if its anything common that anyone is aware of?

Thanks

Mine has been doing this for a while too... not gotten bad enough to be able to find it yet. I did have the aux belt screech at me after the car had sat in the sun all week without being moved, hasn't done it again yet....

[GMC]

Found it - AC Compressor! Think its the clutch on the AC pulley wheel.

Started the engine cold........was ticking away. Turned off the AC......gone.

Tested it driving also, AC on - ticking / AC off - quiet.

I see AC compressor clutch kits are available, I'll put another post up to see if anyone has fitted these or whether they just fit a new compressor?