PeachParts Mercedes-Benz Forum - View Single Post - Removing a Greasecar system in a 1974 240d

moon161 · #2 06-30-2013, 06:29 PM

I hear the Greasecar forum is policed, so to speak, a posting requesting a manual or removal how to may be deleted. I don't have a GC system, and there's no guarantee it was installed per documentation any way.

I do have a 2 tank system similar in design to a GC system tho.

GC excision SUGGESTIONS ONLY. Your mileage may vary, and you may turn it into a non-running car, IT'S YOUR HAND ON THE WRENCH, THINK ACCORDINGLY. Take notes & pics so you can undo what you done did, if need be.

To start I would identify any 'foreign' components, the VO tank, fuel lines, switching & controller will probably be obvious. Disconnecting may not be to hard, restoring stock condition may be a challenge, YMMV. Don't wear anything you need to wear again, VO can be messy.

They probably tapped coolant from the back of the head, and from the lower radiator hose. In a stock car there should be NO TEES in these lines. Cap the branch of the tee, or replace the tees w/ splices or replace the hoses w/ stock.

Fuel supply line probably goes to a 3 port solenoid valve. Remove fuel supply line and hose to the lift pump, splice them or replace w/ fuel line.

Fuel return line probably goes to a 3 port solenoid valve. Remove fuel supply line and hose to the fuel filter, splice them or replace w/ fuel line.

Secure and or cap loose and dripping ends. Clean any oil with mild detergent and water before it gets sticky.

You will have introduced air into the fuel system. Prime the by unscrewing the white knob next to the IP and pumping it a lot, or pump the black knob next to the IP, new or old primer depending.

Start and or troubleshoot no start condition until successful.

If successful, remove foreign components.

NOTE:
The bolts in the banjo fittings on top of the fuel filter together may have been replaced with solid bolts or blocked by weld or JB weld. If it goes through a banjo fitting, it should have a hollow core and a thru hole perpendicular to the shank near the head. If it should run without it, but it won't be stock.

I can almost guarantee that the hoses connecting the IP, lift pump and fuel filter are not in stock configuration. Typical re-routing changes the fuel filter from the pressure side of the lift pump to the suction side.

IIRC, stock routing, based on the used engine i bought is : Supply line> right angle filter > lift pump > fuel filter inlet > fuel filter outlet > cigar hose > IP inlet > injector hard lines > injector overflow lines > fuel filter > fuel return line. I don't have a stock fuel system for reference.

Fuel passes through the filter once on the way in, and passes through the filter mount on the way back to the fuel tank to vent air out of the filter.

Research stock configuration, procure needed parts and make it so.

Put removed components in box and post for sale here, craigslist, greasecar forum. GC may not let you post ad for used system.