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#1
08-19-2004, 12:07 PM
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What is the likelihood of Oil Pump Chain failure?
After reading the post regarding the 602 oil pump chain failure, I am a bit concerned. I believe that the 606 engines use either the same (or a mildly revised) version of the same engine block architecture as the 602 & 603, (but obviously different pistons & cylinder head). It would then seem logical that they also use the same oil pump & chain as well.
Question: Is oil pump drive chain failure a fairly common occurrence on 602/603’s with high mileage? I just spent a lot of money on rebuilding my cylinder head, and even with 335,000 miles you could still see the original honing marks in the cylinder walls. So I figure I’m ready to roll along to 500,000+ miles with this car. It would really *suck* to have the oil pump chain ruin my grandiose plans. Opinions Please? Is this a legitimate thing for me to worry about, or do I need to up my dosage of anti-obsessive medications? 
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Current rolling stock: 2001 E55 183,000+ Newest member of the fleet. 2002 E320 83,000 - The "cream-puff"! 1992 500E 217,000+ 1995 E300D 412,000+ 1998 E300D 155,000+ 2001 E320 227,000+ 2001 E320 Wagon, 177,000+ Prior MBZ’s: 1952 220 Cab A 1966 300SE 1971 280SE 1973 350SLC (euro) 1980 450SLC 1980 450SLC (#2) 1978 450SLC 5.0 1984 300D ~243,000 & fondly remembered 1993 500E - sorely missed.  1975 VW Scirocco w/ slightly de-tuned Super-Vee engine - Sold after 30+ years. Last edited by RunningTooHot; 08-19-2004 at 05:16 PM. Reason: Title Change 
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