On our 24v there is one hydraulic lifter clicking, this appeared after i changed to Castrol synthetic oil last year. I have been living with this clicking but now that the gearbox is new the sound of this lifter stands more out since everything else is more quiet and smooth than before.
I have added some Molly hydraulic valve additive earlier but that showed no effect at all.
I have now been recomended a engine flush with Tunap (
http://www.tunap.com/en/ranges/automotive/products/p327.html ) - naturally i am a bit concerned over these cleaning stuff - will it cause even more problems.....?
They use it all the time at my friends workshop, but still i am not convinced.
What are your oppinions on this ? Any experience ?