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#1
02-15-2004, 03:52 AM
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m104 crankcase pressure going out my oil leak?
My 96 E320 w/m104 used to have quite a bit of crankcase pressure when I took off the oil filler cap at idle. Now it has an oil leak I suspect to be the rear main seal (1qt every 2500 miles) and no pressure out the cap. Is all that blow by venting out the bottom of my engine? Is there harm (other than environmental) in this? THere has always been a lot of oil in the intake past the crankcase vents (car has 150k miles on it), not good for the throttle valve I am sure, so is it a silver lining the oil going out the leak instead of into the intake? I changed the plugs today they were clean but worn (around 20K miles on them I think).
Car has random misfire codes 300 and 304 I think (cyl #4) about every 500 miles when I let off the gas and then get back on it. It runs ROUGH until I stop (which I am forced to do by the rough running engine) then it runs smooth after I immediately start it back up. TIA, Tom
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RIP "Betsy" (Oo=*=oO) '96 E 3 2 0 (W 2 1 0) M 1 0 4 (Totalled) Spaces in sig so as not to screw up the SEARCH; every time someone searches for that MB they don't want my sig! 2004 Audi A8L '98 VW Passat 1.8T 5M '87 Alfa Romeo Milano 2.5L 5M '67 Impala convertible, 327cid 
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