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#1
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Even though I have been a MB owner for over
18 years, I recently found your site: GREAT! I have a 1984 300SD and a 1963 190SL. SD Questions: 1. What should the oil pressure be after traveling on a long trip on the inter- state going 75 mph. (car has 221,000 miles). Really, want to know what would be normal with this mileage. 2. This year when I turn on the air conditioner, the car will idle great for maybe 5 seconds, then it will begin to idle rough. Other times, it will idle rough all the time with the air on. Previous years, idle was the same with or w/o air. Car idles as a gasoline car with air OFF. Cools great! 190SL Question: Car has webers with the "pancake"filters. Will installing the original silencer make the car sound much less nosiy? I realize this a long post. Answer only if time permits.....THANKS!! |
#2
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1) the weight of oil you use will affect the oil pressure when warm, I would expect that the oil pressure at idle, in gear, and warm after driving 75 miles would be 1-2bar or 15-30psi range with 20w50 oil in the engine.
2) The rough idle problem could be weak motor mounts(causing you to feel more of the engine vibrations), Loose A/C belt vibrating (have heard them where it felt like the car is comming apart), or possibly an idle rack limiter that the spring is weak which allows the injection pump rack to oscillate too far causing a "rocking" affect in the whole car. Re: 190SL That car was made before I was concieved, and I have only had the opportunity to work on one (brakes). Sorry can't help. ------------------ MB Medic 14 year MB tech 7 year shop foreman @ independent MB/Volvo shop |
#3
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Weber carbs are going to be somewhat noisy unless you construct a box to pull the air from outside the engine area.
------------------ MERCEDES BENZ MASTER GUILD TECHNICIAN ASE MASTER TECHNICIAN 27 YEARS M.B. TECH |
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