Knocking Noise from engine. At wits end....

[CedricSaxo]

Hi all first post and a desperate one. I have a knocking noise coming from my engine. It kicks in almost like a switch being flicked, halfway up my temperature guage at between 1500rpm and 2000rpm. Prior to this my engine is so quiet I can barely hear it. It started a year ago and below is a list of my attempts to rectify it.

1. Alternator belt changed/pulleys checked - No fault found
2. Alternator bearings replaced - Knackered and replaced but noise still present
3. Tappet clearances checked/adjusted - Engine runs quieter but knocking remains
4. Full service - Spark plug clearances checked during service
5. Oil treatment - oil replaced also coming out clean
6. Big end/conrod bearings replaced - Found to be worn but no damage to crank
7. Oil pump inspected and filter/pickup cleaned out - no blockages and working well oil pump tested in operation oil moving freely around engine.

The timing belt has been done in last 2 years, before anyone asks. Please help I am at my wits end!

[sri_130]

Post a video?

[CedricSaxo]

I'll see what I can do I'm not very with it with technology and don't use a smart phone.

I've been informed by a former Citroen Master Tech that my engine suffered from 'bearing rumble' of which there is a repair. Has anyone else experienced this or know of it?

What I am experiencing does match the symptoms he describes perfectly and I have had the lower bearings changed.