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#1
10-25-2008, 11:12 PM
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IP o-ring life
Well almost two years ago I changed my o-rings on my 1992 300D 2.5. Almost two years and almost 50K ULSD miles later it is leaking again. I am guessing this is a pretty reasonable service interval. Anyone have any thoughts?
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My Daily : 96 E-300 Diesel with 195,000 miles Retired: 92 300D 2.5 T 345K miles and for sale Retired: 95 E320 157K miles and currently parked with blown engine Both retired cars are for sale as is my w124 shop inventory 
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#2
10-25-2008, 11:24 PM
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Seems rather short to me; was the O-ring Viton or Buna rubber? I always make sure I get Viton, and it seems to last a long time.
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'98 E300 DT '87 190D 2.5 turbo RIP '92 S500 Sold '03 3.2TL-S A-Spec
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#3
10-26-2008, 12:42 AM
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Its strange, 110,000 miles so far and after 10 years, I have no leak on my OM616 turbo which is driven in hot and cold weather condition in India nor the 300D turbo which is used in Staten Island.
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99 Gurkha with OM616 IDI turbo 2015 Gurkha with OM616 DI turbo 2014 Rexton W with OM612 VGT
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#4
10-26-2008, 12:57 AM
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Your OM616 does not have rubber o-rings like his OM602.
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#5
10-26-2008, 01:01 AM
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Quote:
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99 Gurkha with OM616 IDI turbo 2015 Gurkha with OM616 DI turbo 2014 Rexton W with OM612 VGT
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#6
10-26-2008, 12:31 PM
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Seems like a short lifespan to me but USLD is still relatively new and perhaps this is what we will come to expect of Buna....?
My 606 has 2-3 times as many orings as yours. All but the DV's were changed to viton 3 years ago and its doing fine.
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Terry Allison N. Calif. & Boca Chica, Panama 09' E320 Bluetec 77k (USA) 09' Hyundai Santa Fe Diesel 48k (S.A.)
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#7
10-26-2008, 09:14 PM
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Yeah. I got whatever they had at the MB dealer. I don't know what the compound was. I know they started leaking pretty quickly after I started using ULSD regularly. Could be I torqued them a little too tight. I know I am a pretty high mile driver but so are several others on the forum!
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My Daily : 96 E-300 Diesel with 195,000 miles Retired: 92 300D 2.5 T 345K miles and for sale Retired: 95 E320 157K miles and currently parked with blown engine Both retired cars are for sale as is my w124 shop inventory
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#8
10-26-2008, 11:36 PM
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Perhaps you can do what I did; take an original oring to a bearing/seal specialist and ask for a set of Viton orings; they will cost you about 20cents each and will be way better than the Buna rubber orings coming from the stealership. Even with ULSD, they will last a long time.
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'98 E300 DT '87 190D 2.5 turbo RIP '92 S500 Sold '03 3.2TL-S A-Spec
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#9
10-27-2008, 01:01 AM
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The dealers stock is Buna.
Go to fryerpower.com (a forum member) and get a viton set for your engine. I do beleive they last longer.
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Terry Allison N. Calif. & Boca Chica, Panama 09' E320 Bluetec 77k (USA) 09' Hyundai Santa Fe Diesel 48k (S.A.)
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