View Single Post
Old 03-25-2002, 09:51 PM
David C Klasse's Avatar
David C Klasse David C Klasse is offline
CheFrac is Back!
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
M104 motor seals/guides?

I do know that the early M103 motors were notorious for valve guides and seals needing early replacement. However, I still hear of it needing to be done on late M103 motors also.

This has spurred me to ask about my M104 motor in my 1995 C280. What is the average for guides/or/seals replacement? I now have 122k miles on mine, and I burn, on average, at most a quart of oil in 4-5k oil changes. Though there have been times where I noticed I needed probably 2 quarts between an oil change. Though I do drive hard, and do a lot of freeway driving with high revs, so I know that makes it more likely to burn oil.

My question, what wears the seals/stems faster, TIME or MILEAGE? I drive about 30k a year. Car still runs and performs like a champ... I am VERY good about oil changes, and other maintenance, but I do really drive this baby hard. What would one assume a good time to take off the head and/or do the seals or guides? Think I'd be good for 200k miles with my good maintenance, albeit a lead foot.

2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
Reply With Quote