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Thinking of changing to Shell Helix Ultra 0w40 oil, recently had change to Petronas 5w40 which did make a difference. Car doesn't get out much, sits all week and on weekend does minimal miles, the noise does quieten as the temperature rises but never fully goes, from outside an audible tick can be heard on both sides but would say it is louder on bank 1-3.
Mine seems to have settled today, just drove it around in normal driving and took it on a steady 3000rpm run for 10mile, seems much better when warm so starting to think it is a lifter not holding, would say it's definately on bank 1-3 (drivers side in UK)
Geflackt how did you get on and if now sorted what do you think it was... I have noise both sides so think it could be faulty lifter(s) the noise is worse when cold but soon settles to a barely audible tick with revs when warm, it is getting better as I use car after the oil change to 5w40. I have checked the plugs on 3,5&6 (also replaced) and they looked fine. I am having terraclean/decarbonising done tomorrow and will see how it goes
All checked and oil changed, instantly car was quieter and on drive home noise has almost gone...long story but car was serviced in July 2014, major including plugs before I bought by garage selling. I contacted garage to find out oil used and they said 10w40 Mobil super semi.. After few emails I advised this wasn't A40 approved and few days later received email to say think they used Mobil 3000 fully. So not taking chance (cars only done 500 miles since July) decided to have oil and filter change using 5w40 fully A40 approved, after change and running with fuel pump fuse out to turnover, codes cleared and car starts no smoke, runs smoothly and ticking started to die away...fingers crossed that's it but will live in hope.
In garage at moment, he has traced to bank 6 He suggests bore scope in and if that looks ok then valve train I have put a fuel cleaner in and running a tank of shell v-power and must say it's much quieter today. It probably is the bores as has 75k miles on but doing limited mileage/summer car so should be fine for few years I hope then will sell and move on
I have a ticking noise which seems to get a little louder as car warms which gets faster with revs. Cars had major service including plugs and coil packs, having another oil change this weekend as not sure right oil was used, dealer said at first they used Mobil 2000 10w40 semi then when challenged as not A40!they changed to Mobil 3000 fully 5w40... Not convinced. Cars only done about 500 miles in 8 months so wondering if sticking lifter or if anyone else had had similar?