Engine noise

[jacko16]

Hi there,

In my 2010 Aurion and after a day a rattle appeared from the engine under load at idle (ie in R or D sitting stationery or with A/C on). 

The Car have only 50,000.K

I have changed the Blet and the Alternator.

This noise is coming from the belt and pulley.

If I remove the belt its ok. No Noise.

Any Help?

Thanks

Engine hot or cold noise is still there when engine is under load. At Hi RPM there is no noise.

Thanks

Edited June 17, 2019 by jacko16
More info

[LordBug]

Could be the tensioner pulley. Maybe take the belt off and give that pulley a wriggle and turn it a bit by hand, if there's play then it definitely needs to be replaced.
Hopefully it's that and not a different bearing.

 

[campbeam]

I previously watched some YouTube videos about repacking sealed bearings. . When I recently replaced the alternator, I took the opportunity to repack both of the idler pullrys. Interestly, it was the upper idler pulley underneath the thermostat housing that was in more need of having to be regreased. Instead of a pick, I used a precision screwdriver with the smallest flat blade plus some silicon spray to help the process. I also used Castrol LMM grease, pushing the grease in with my finger plus also grease on the inside of the seal which then helps to push more grease into the bearing. 

https://www.youtube.com/watch?v=lf_sttobyyY

 

[AurionX2]

Yeah, sounds like a bearing, removing the belt takes the pressure off the pulley.

[jacko16]

On 6/17/2019 at 5:46 PM, LordBug said:

Could be the tensioner pulley. Maybe take the belt off and give that pulley a wriggle and turn it a bit by hand, if there's play then it definitely needs to be replaced.
Hopefully it's that and not a different bearing.

 

Ok Thanks will check.

[jacko16]

On 6/17/2019 at 8:49 PM, AurionX2 said:

Yeah, sounds like a bearing, removing the belt takes the pressure off the pulley.

Thanks.