I've ordered a ridiculously cheap wifi endoscope (£12 on Amazon!) to be delivered today, and will check the camshaft cover part number when it arrives. If the number confirms the revised cover profile, then the only explanations I can think of are that:
1) PSA had a modified 8mm chain version which Vauxhall used when the Vivaro C was launched in 2019
2) That my van suffered the problem within the three year warranty period and had the modification performed before I acquired it in January 2023.
Regarding the oil, I've discovered (see post 28 in this thread - https://www.berlingoforum.com/thread-23596-page-3.html) that PSA are indeed now recommending this new Total Quartz Ineo RCP 5W-30 engine oil:
https://total-cdn-lmdb.afineo.io/ORIGIN ... 700062558
Here in the UK Opie Oils sell this in 5l cans for £35.10 or in 20l "lube cubes" for £130.62 (equivalent to £32.65 for 5l).
So, whether or not my campervan has already had the 8mm chain mod, my plan is to switch to this oil and change it oil every year. It's insured on a limited mileage policy (5000 miles) so that might ordinarily be overkill, but for the sake of around £40's worth of oil each year, it seems a worthwhile precaution!
I hope this information is useful to others, and will let you know what my endoscope shows when it arrives!
Cheers,
Alan
Juan Sheet wrote: ↑Mon Feb 26, 2024 6:09 pm @Conrod: No PSA never switched from 8 to 7 to 8. Affected engines always had the 7mm chain and only now are they being replaced with a stronger 8mm chain where the symptoms present.