Quote:
Originally Posted by gmog220d
I dug in my book, "Service Manual - Engines 615, 616, 617.91", published in 1980, and also found reference to the "heat shield" as a "nozzle plate". In section 05-117, "Removal and Installation of precombustion chambers", there is a photograph looking down into the chamber and there's one of these old style heat shields visible. There is also a cut-away diagram that shows this older style.
Apparently by 1980 they were still using the older style. The text in 05-117 for sure references replacing these "nozzle plates" when installing the injectors, but makes no mention of the newer "resilient" style. I wonder when the design changed, exactly.
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The publishing date does not reflect when the stuff was written. On US Books you would look at the copyright date and it also may give dates when they were reprinted. The CD has no dates.
My Car is a 1984 and I pulled the Injectors in 2007. The Injectors appeared to have been the originals 27 years old with 198,000 miles on them (and worn out).
If you look at it from that perspective an Engine with the old Top Hat Nozzle Plates by 1980 could indeed have never had the Injectors pulled out for someone to changed to the heat shields. Reason enough to keep it in even the newest copy of the manual on an older engine.
Again looking at it from that perspective does not indicate they were using the Top Hat Nozzle Plates when they were building Engines in 1980.
Also my 1982 Volvo diesel uses the same new style Heat Shields as the Mercedes and there is no mention in any book I have see of the Nozzle Plates. I suspect it is the same with the VW Diesel Rabbits.
Attached is where I got the info on the bottom of the 2nd page and 3rd page.