I replaced my valve stem seals after I noticed an increase in oil consumption, smoke from the exhaust, spark plugs with traces of oil, and a considerable amount of oil in the intake after removing the throttle body. After a few hundred miles, I rechecked my work: oil consumption was down where as now I don't even need to top up between oil changes (7000 miles ±), spark plugs are clean and dry, and there is no smoke coming from the exhaust. However, I removed the throttle body and found some oil seepage, maybe less than 5 ml. Is this normal after a valve stem seal replacement or should the intake be completely dry?

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1990 190E 3.0L

Oil from the breather puddles under the t/b. Pretty much normal to always have a bit there.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Sounds normal to me. It certainly doesn't seem to warrant pulling the head. When the time comes, however, these engines respond well to head work. The bottoms seem to last forever making a valve job worthwhile when the time comes.

Hope this helps.

Agreed, I did a valve job around 270k on my 300SEL and the bores were still full of crosshatching. Dry compression test revealed between 160-170psi on all six after the valve job.

Total cost was about $650 only, including machine work with all 12 new valve springs and all 12 guides replaced.

Car just spent 70 miles going 75mph yesterday on the way to dinner... no issues.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Dang that's cheap for a head gasket replacement and valve job. That's at least $900-$1,200 from an indy MBZ shop in the Sacramento, CA area.

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03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather

Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio

I did the work work myself, there is the differential in price.

Machine shop was about $325 labor only.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]