|
|
|
|
|
#1
11-04-2010, 02:46 PM
|
|||
|
|||
|
no oil pressure
I have a 1975 240D that hadn't been started in 10 years. I got it going but can not get any oil pressure. Here's what i have done:
any help would be really aprreciated. I really like this ol' car and what to get her on the road. Jack 
|
|
#4
11-04-2010, 04:31 PM
|
||||
|
||||
|
If you can see oil spraying on the cam lobes then you know you have oil pressure. Make sure the gauge is hooked up. Sometime when the leak people will cap them off.
However yours just might be stuck from sitting so long.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
|
|
#5
11-04-2010, 04:36 PM
|
|||
|
|||
|
I don't know about the '75 240D but my '74 280C (gasser) has an electric sending unit for the oil pressure. Does the 240D have the manual or electric gauge?
Is there an oil line leading from the filter housing through the firewall and under the gauge console?
|
|
#6
11-04-2010, 04:43 PM
|
||||
|
||||
|
240D's had a manual oil pressure gauge.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
|
|
#9
11-04-2010, 05:16 PM
|
||||
|
||||
|
if the filter is bypassed, then there's no pressure being built in it and it wont show, If I recall the pressure line feeds from the filter itself
__________________
hum..... 1987 300TD 311,000M Stolen. Presumed destroyed
|
|
#11
11-04-2010, 05:49 PM
|
||||
|
||||
|
not sure. I'm just roughly aware of where that line goes to. Others will chime in
__________________
hum..... 1987 300TD 311,000M Stolen. Presumed destroyed
|
|
#12
11-05-2010, 01:29 AM
|
|||
|
|||
|
Has the filter body been off the crankcase ? Is the gasket fitted correctly?
|
|
#14
11-05-2010, 04:27 PM
|
||||
|
||||
|
I had very nearly exactly the same issue with my N/A OM.617 --An engine that I had completly rebuilt around 2 years ago.....
(N/A OM.617 has a oil-system near the same as your OM.616....) The Oil-pump was well within spec, so was not replaced, but carefully checked and cleaned, as well as the relief valve. at the time I primed it with a thick gear oil.... The engine sat there on the floor for 2 years until recently when I fitted it to the chassis and got it all ready to fire up. I filled the oil-filter with oil (Vertical filter and allowed the oil to drain down into sump and further re-prime the pump etc. I then fitted the filter element and re-filled the housing. With no injectors fitted, I near completely flattened the battery trying to get oil flow--let alone Pressure, spinning it over..... --None at all..... During this time, I pulled the oil-pump drive Skew-Gear from the Rt. hand side of the block in front of the I.P. checked it etc--I had replaced this drive gear as it was worn, as well as its bush-bearings-- replacement was perfect, right size/length, compared to original (Which amazingly I still had!) and engaging in pump--No probs there.... Cut a LONG story short, The ONLY way I could get the thing to prime was to remove the oil-pump drive skew-gear (For the fourth time!) and use a piece of dowel with a slot cut in the end and spin between my hands Clockwise to drive the oil-pump directly and then sudden resistance was felt and oil started to fill into the filter-housing--which I had removed to see the flow....  Looks to me that the speed a Starter cranks the engine just Isnt Enough when the oil drains back after a Long time, but as soon as it fires up, running at 800rpm+ all is well.... Its been fine ever since, Start the engine and you have pressure within 1 second or so. Hot running pressure is 2 bar + idling... Crank only and you dont seem to get much if any pressure if its been standing overnight.... You say that you SEE oil flying round the cam if you start the engine? --If so, you Must have oil-pressure! Look in from the Left to the Right Through the Oil-Fill cap hole with a torch when its running--Should see jets of oil directed at the cam-lobes from the oil spray-bar  -This will Confirm Oil-Flow and at least Some pressure Mercedes 'Manual' gauges have been known to Leak.....(Ive seen two leaky gauges, Makes a Hell of a mess!)--Check for horrible black stains on the transmission-tunnel carpet where your right leg goes when sitting in there.... I wonder if this happened years ago, and someone just disconnected and sealed the line, so the gauge no longer works....?
__________________
http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.  W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year....
|
 |
| Bookmarks |
|
|
Linear Mode
