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M116 Timing Chain guides
Bought a 1990 420SEL a couple of months ago with 96,500 miles. The PO had replaced the timing chain and guides back in 2004 at 73,000 miles. I was worried about the guides as it has not been a lot of miles, but 15 years has elapsed. Doing a bunch of research and look at videos made me very worried that the guides would be bad.
I borrowed my airplane mechanics’ borescope and took a look inside the motor. Luckily the guides still are mostly white with a slight discoloration. What does the group think? Thanks for your input. Stephen
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Regards, Stephen 2006 E500 Wagon “Werner”, 114,500 miles 1990 420SEL “Mr. C”, sold 1984 300SD “Dieter”, 2nd owner, 66,000 miles 2011 ML350 Bluetec “Baron”, Sold 2011 R Bluetec “Fancy”, Totalled, RIP 1994 S500 Coupe, Sold 1984 300SD 236,000, Sold 1979 300TD, Black Mariah, flooded in Katrina |
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Also make sure what ever oil you are running hasa zinc count 1200 ppm or Above! The rocker/cam geometry creates a LOT of force at that mating surface. Jono Sent from my SM-G960U using Tapatalk
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta |
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Thanks for the reply.
After I bought the car and changed the oil, I added some automotive camguard (aslcamguard.com/) to the engine. I have used the aviation blend of camguard in my Continental IO-550(Cirrus SR-22) with good results. I use the diesel version in my 1984 300SD. When I change the oil again in the SEL, I will send a sample to blackstone and see what the report says. Stephen
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Regards, Stephen 2006 E500 Wagon “Werner”, 114,500 miles 1990 420SEL “Mr. C”, sold 1984 300SD “Dieter”, 2nd owner, 66,000 miles 2011 ML350 Bluetec “Baron”, Sold 2011 R Bluetec “Fancy”, Totalled, RIP 1994 S500 Coupe, Sold 1984 300SD 236,000, Sold 1979 300TD, Black Mariah, flooded in Katrina |
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Thats about what they look like on my 420SEL and they were changed in 2001 and have about 90k on them.....
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#5
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Brad Penn 20/50 has been our pre-95 go to oil ever since everything started to get reformulated years ago. Never a problem despite Hard usage! Jono Sent from my SM-G960U using Tapatalk
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta |
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