As Phase 2 of my R300K 'recommissioning', I need to sort a timing belt replacement (the existing is 5 years old). To my shame I've not done it myself before, and reading up it seems the perceived wisdom is to change the tensioner at the same time? A quick removal of the covers turned up the following:- I'm assuming I have the dreaded automatic belt tensioner there? There is lots of noise in historic posts about these being c**p but I take it that this only really becomes an issue with mega-bhp, rev-happy, full-on track-day or race applications? It's been fine up to now (road plus occasional track days on a standard 160bhp engine) so I have kind of answered my own question, but for research purposes,at what point does the need for the manual tensioner (which seems to be an engine out and drill / tap new holes job) come into play?