gulum1804,
Interesting that you are experiencing "timing chain stretch".
Who does your maintenance......authorized MB/FL Sprinter dealer shop.....an independent Sprinter shop.... DIY?
What engine oil have you been using?
What oil and filter change mileage are you using? 10k......15K.......20K (like the manual suggests)?
Do you run your engine to redline (I.E. > 3800 RPMs) often? (Do you run @ > 3200 RPMs all the time)?
Do you use a Scan Gauge II (or similar) so you can tell when your transmission needs to be manually
downshifted? (I.E. do you lug your engine @ < 2200 RPMs or do frequent stop and go like deliveries).
I have not heard that "timing chain stretch" (beyond what the hydraulic timing chain tensioner can accomdate)
is any sort of a recurring problem that occurs frequently.
You may be the first person I've heard of with this issue so it would be interesting to discover how you
drive and maintain your Sprinter to see if there is something you might be doing that causes or contributes
to "timing chain stretch".
Your post indicates you may have had this issue previously......was it on the same OM-642 3.0 liter V6 engine,
and at what mileage did it occur.
I've done > 1/2 million miles with all 3 USA Specification Sprinter engines (OM-647 2.7 liter Inline 5 cylinder, 3 OM-642 3.0 liter V6
engines, and one OM-651 2.143 liter Inline 4 cylinder (now with 192,000 miles), all of them sometimes towing
at ~12,000 lbs. CGVW, and have had no engine internal issues.....ever.
Inquiring minds would like to understand this issue and decide if it's a common issue or something unique to the
way you drive your Sprinter.
Roger