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#1
10-13-2017, 07:49 AM
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Anyone ever use an oil accumulator?
These devices drastically reduce start up wear to almost none. When you shut the engine off, it pumps pressurized oil into the engine and maintains the pressure until you start the engine again.
I read here and got interested. building an aux oil tank to increase oil capacity This guy explains it better than i do. https://www.youtube.com/watch?v=vyaGoj60A6s My question is where to install it?
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. 
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#2
10-13-2017, 08:50 AM
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A true dry sump system would be one project and an accumulator would be another. A dry sump would require major surgery to the pan and pump, an accumulator is just plumbed into the oil circuit. I used an Accusump on on my race car, which had a 400 HP high compression engine with high lift cams. It also prevents oil starvation on fast turns, where centrifugal forces can push the oil away from the pickup.
I can't imagine why you'd need one with a Mercedes Diesel. My 602 has 418,000 and barely uses oil. Oil pressure is good even at idle. Through the years I've replaced a couple of worn lifters, but we can argue about whether that's start up wear or not. As for fast turns, if you figure out how to go that fast in an old Diesel, let us know. If you really want to waste your time and money, tee an accumulator into the turbo feed line. Use a solenoid valve controlled by a manual switch. Done.
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#3
10-13-2017, 12:23 PM
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Quote:
If you are truly interested in one of these, they are popular on the VW Samba web forum, under VW 181, aka the Thing. Several Thing owners use them and they are not super costly
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Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6
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#4
10-13-2017, 05:41 PM
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One of the reasons diesel engines enjoy long life is the fact that the fuel itself is a lubricant therefore start-up wear is at a minimum.
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#5
10-13-2017, 07:13 PM
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Large stationary have prelube pumps. Some truck / earth moving equipment has a oil pump on the back of the starter. ( the stater motor is powered up but the solenoid isn't triggered during pre lube. )
An accusump has limited benefit in a road race car. In long sweeping high g corners where oil in the pan moves away from the pickup and pressure drops, the accusump will run out of oil and then be somewhat slow to refill if the pressure pump was sized properly. Remember in a 1 g corner, oil in the pan is at a 45 degree angle. A dry sump is much better. Making a dry sump pan is trivial if the original pan is steel. With an aluminum pan, I'd put a fitting on the side of pan + a dip tube to the bottom + screen and call it a day. However, a dry sump has about zero benefit on a street car.
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