[W126 Coupe] 1991 560 SEC Fuel Pump Replacement

[Dick Spellman]

Henry,

To second that opinion.. remove the entire package and do the r&r work 
on a bench then reinstall.  Kinda thought I'd expressed that in an 
earlier post re: 'massive fuel leak'.

Where you will have two lines and wonder which one needs clamping, go 
for the larger diameter hose with the second outer casing that should 
feed to the fuel filter left side as I recall.  That should stop the 
tank leakage while you work at the bench.  Set-up so the rear of the car 
is at your doorway to allow the fuel and fumes to evaporate more easily. 
  Keep away from light bulbs, open flames all that stuff during the 
entire  process.  No lamps other than a Piezl headband model or 
something similar for safety.  I use my trail Piezl and it is safe.  So 
something  battery operated should be safe.  No AC incandescent drop 
lights, light sticks and so on.  No cell phone.

Be sure and tighten things with care and you should be okay.  I always 
have a warm body (wife/kid) sit in the car after I think I am done and 
turn the ignition switch on/off to energize the fuel pump(s) while I 
watch for leaks before starting the engine.  You could jumper the fuel 
pump relay if you are solo I suppose but, it would take you a few 
seconds to move from front to rear to observe and then back 
again...better to see if a warm body can give you a hand and reduce the 
timing to bare minimum.  Yeah, safety is a big thing with fuel so take 
extra care.

Not a pro, just a hack and having fun too but, be safe and good luck,
Dick