8. Get some parts. Wait, so what exactly are we replacing? Well, you can buy an entire rebuild kit (check out this link from whunter: http://www.peachparts.com/shopforum/showthread.php?t=240104) through Fastlane/AllPartExpress which includes the following:

000 091 10 19 SPRING
000 091 13 10 VALVE (X2)
023 997 87 48 SEAL RING
023 997 86 48 SEAL RING
000 091 17 80 GASKET
021 997 88 48 SEAL

If after reading this you want to replace everything, then buy the kit through the forum – it’s well priced and you get it all at once. I started out by running to the dealer to grab the o-rings, then back later for something else, then back later for . . . . you get the picture. Note that when I ordered the o-ring with part # 021 997 88 48, the dealer told me it had been replaced with # 012 997 72 45 – that is what I bought and used.

Here is what it all looks like. Note that this is a diagram of only the parts in the kit and this does not show all the individual components of the pump. Also, only one valve is illustrated, the other one lives under the top fitting (that the fuel return line attaches to):

Attached Thumbnails

 

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
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"Back off, man. I’m a scientist” ~ Peter Venkman