Oil Pressue Gauge - Mercedes-Benz Forum

 
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post #1 of 2 (permalink) Old 04-09-2005, 02:35 PM Thread Starter
BenzWorld Junior Member
 
Date registered: Jan 2004
Vehicle: 1970 280SE
Location: Laurel, MD
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Oil Pressue Gauge

My 1970 280SE's oil pressure gauge has recently started fluctuating. Normally after an oil change, the gauge would be to the top (45) upon start of the car and even when coming to a stop.

Recently, the gauge will drop to 15 when coming to a stop. The engine feels slightly "sluggish" when accelerating until the gauge is again to the top (45), which takes about 3 seconds. Difference here is the drop to 15, sluggish engine, and delay in pressure. Previously, even if there was a drop in pressure, the engine wasn't sluggish and the pressure was restored with a second of accelerating.

I've just had an oil change (is 5 quarts enough for this 6 cyl engine?) with new fuel, oil, and air filter. She's running smoother (air filter was ugly) but this oil pressure thing seems to be either fuel/air mixture problem...or compression. Any ideas?
rgarner is offline  
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post #2 of 2 (permalink) Old 04-10-2005, 01:47 AM
BenzWorld Senior Member
 
Date registered: Jan 2005
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RE: Oil Pressue Gauge

It sounds like some one has altered the timing,hence the sluggish performance,this will cause the engine to idle down too far and this will cause the oil pressure guage to read low.Make sure you get someone to do a proper tue up,not just plugs and points but a Mercedes tune up.Thses engines will idle at 300RPM and the guage will only read 1/2 way,nothing to be concerned about there ,but if it only reads that far at driving speed then you really do have a problem.
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