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T-Cut · 29th May 2020, 08:53

Could it be the 'Slack Tappet Simulator' (STS) as I call it?
Click: https://the75andztclub.co.uk/forum/s...rchid=17845112
Contrary to RAVE, the STS often occurs within seconds of a cold start (especially when the engine's not been run for a while and the fuel vapour cannister is saturated). The tapping follows the engine revs and will persist for quite a while. It's part of the emissions control system and and is quite harmless.

TC

29th May 2020, 08:53	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Could it be the 'Slack Tappet Simulator' (STS) as I call it? Click: https://the75andztclub.co.uk/forum/s...rchid=17845112 Contrary to RAVE, the STS often occurs within seconds of a cold start (especially when the engine's not been run for a while and the fuel vapour cannister is saturated). The tapping follows the engine revs and will persist for quite a while. It's part of the emissions control system and and is quite harmless. TC