Clicking noise coming from engine (2002 v70)

02V70 · Post by **02V70** » 20 Aug 2022, 12:41

After I put the engine back together after replacing the head gasket, and after a few weeks, I started hearing a ticking noise coming from somewhere. I have attached a video file with the noise. The noise only happens on idle, and goes away when driving or reving. I think it happened because I put something together wrong. It sounds like it may be coming from where all the pullys and belts are.

Post by **jonesg** » 20 Aug 2022, 17:54

i'd pull the timing belt cover and watch the belt at idle.

02V70 · Post by **02V70** » 06 Sep 2022, 19:41

I pulled the cover and didn’t see anything different happening when there was a clicking noise. However, I did notice it only happens when the A/C is on. I can’t really tell where the noise is coming from, but it doesn’t sound like it’s coming from the compressor. I attached a video showing the noise coming and going with the a/c compressor.

Post by **xHeart** » 07 Sep 2022, 07:30

To me it is a viberating sound from plastic material -- loose belt cover housing, not properly fastened. A careful look at the edges of the belt may not be a clue, but the belt tensioner may provide a clue.

Engine Timing Cover Casing:

Post by **jonesg** » 07 Sep 2022, 10:19

does the aC blow cold air, sounds like the clutch isn't fully engaging

02V70 · Post by **02V70** » 07 Sep 2022, 10:46

The A/C seems to work intermittently.

Jonboy74 · Post by **Jonboy74** » 07 Sep 2022, 11:25

02V70 wrote: 07 Sep 2022, 10:46 The A/C seems to work intermittently.

You might want to have a look at the compressor cycling. I personally ended up having a weak clutch and had to do the “bread clip” trick (though I used cable ties instead) to get it cycling properly.

Jonboy

Post by **jonesg** » 07 Sep 2022, 18:06

02V70 wrote: 07 Sep 2022, 10:46 The A/C seems to work intermittently.

there ya go then.
Get a strong light and watch the AC clutch, its probably not locking , just clicking.