no oil pressure in engine ,please tell me what to check before i am gone start removing oil pan to check oil pump?what else can cause the problem?

Is there no oil pressure as verified by looking into the valve cover (meaning no oil flow)?

Or is there no oil pressure as indicated on your oil pressure gauge?

If it is the latter, it may be your oil pressure sender. This little device is located under the oil filter. Access is a pain on a OM603, W124, and probably similar on your SD. It has only one wire that runs to it. Search on this website and you will get directions for where to find the sender. And if it is the problem, when you disconnect its wire, the indicated oil pressure will peg at its highest level. Then you have found your problem, and the new part costs $50 or less (depending on what brand you need). Hope this is your problem, because it is alot easier/smaller job than if you actually have no oil pressure.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

no oil flow .

That model engine can drop the windage tray bolts into the pan. Bolt gets into the pump and locks it.

I have a used pump available.

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Present
1987 300SDL
1991 300SL
1990 560SEL
2001 ML320

Past
1969 200D 1979-82
1983 300SD 1984-85
1972 250C 1982-02
1995 S350 2011
1997 S320 2012

I was reassembling my engine (completely) when the engine was out I turned crankshaft to rise oil in the engine manually before starting engine.Start adding oil (pump start rising oil in the system)after cranking with starter oil came back to oil pan.Dip stick was showing in the middle (no over max). Pump down?how much $$$$ for used pump?

$30 + postage. Time to pull the pan and do a complete inspection. May not be the pump. The bolt problem I mentioned happens when the engine is in service, not during assembly. I can be contacted at northamerican22@aol.com, John

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Present
1987 300SDL
1991 300SL
1990 560SEL
2001 ML320

Past
1969 200D 1979-82
1983 300SD 1984-85
1972 250C 1982-02
1995 S350 2011
1997 S320 2012

If you're reassembling the engine it might just be lack of prime. I'm a little out of my element here, but you might be able to pull the injectors and get more speed. I've heard of people packing the oil pump with grease to get prime after a rebuild. You might also be able to hook up two batteries in series to spin the starter for a very few seconds with 24 volts. Anyone know if the Bosch would handle this?

I'm sure others will chime in with ideas.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

thanks to all of you who responded to me, i did not prime enough.Now we have heavy vacuum leak.

black vacuum line which shut ip didnt hold vacuum what is causing the problem?

Work back from the shutoff valve. There aren't that many things that could be bad between the valve and the pump.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

In engine compartment i recheck ---everything is good,than i build air pressure in black line 2psi it is leaking in side car under steering wheel ,remove finishing panel black line is as spare line ,than i connect brown line with blue strip to ip it start shuting down engine only small problem didnt lock rear doors.Engine 603.970 350sd.

The central locking is run by a pump in the trunk, not engine vacuum.

Vacuum goes from the small line going to the brake booster, to the key switch, then to the shutoff valve. Sounds like you have a leak at the key switch.

The trim below the steering wheel is easily removed, pop off the plastic covers and you'll see the screws, and remove the gray plastic retainers from the bottom by giving them a 1/4 turn.

-J

If the engine was apart, then the oil pump will not be able to overcome the check valve in the oil filter housing, if the oil duct between the pump and the filter housing was not primed.
When assembling the engine, instal the filter housing first, turn the block upside down, fill the duct from the pump to the filter housing with oil and install the pump.
Now it's to late for this, but you can loosen the 4 bolts of the filter housing , pull the housing away from the block and crank the engine till oil oil squirts out.
No oil pressure after assembling a 60x engine is a common problem.

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76 240 D. Bought in 1998 for $25.
85 300D. Got it for free with a bad engine. ( Sold )
60 Unimog 404. What was left of it, was given to me. Now powerd by 617A.
88 560 SEL. Bought without engine and trans. Now powerd by 617A.
67 250 SE. Cuope. For resto or sale.
64 220SE. For resto.