Getting rid of the primer pump - PeachParts Mercedes-Benz Forum

tubular031 · #1 11-19-2009, 10:13 AM

Mine is leaking and I was already going to add an electric helper pump to my car. Can I just remove the hose leading into the hand pump and plug it into the IP and bypass it completely? For fuel filter changes I will just turn the key and let the electric pump fill the filters.

Stevo · #2 11-19-2009, 10:19 AM

Your time and money might be better spent looking into oil leaks

tubular031 · #3 11-19-2009, 10:25 AM

no kidding! I already spend a few hundred on parts for this car! I have sitting in the garage waiting to go on the oil cooler hoses and all the gaskets/seals for the oilfilter housing and an oilpan gasket. That should fix most of what is left that is leaking! Already did the turbo oil lines and the return to the pan.

the big probelm I have is after sitting for a day or 2 all the fuel in the lines goes away and air enters so i have to prime the system again to run it. When I prime it I get a ton of diesel leaking out the pump!

MercFan · #4 11-19-2009, 10:36 AM

Quote:

Originally Posted by tubular031

...the big probelm I have is after sitting for a day or 2 all the fuel in the lines goes away and air enters so i have to prime the system again to run it. When I prime it I get a ton of diesel leaking out the pump!

Wouldn't you just want to replace the priming pump with a nice new one - it was pretty easy to replace and not so expensive as I recall...

How difficult was it to replace the oil return lines on the turbo? Something that I should do...

tubular031 · #5 11-19-2009, 10:46 AM

If I have an electric helper pump, what the point of the hand pump (other then priming if the electric pump fails)?

I pulled the intake and exhaust manifold with the turbo in one piece. it was not bad. only a little cussing and screaming

when you pull the tube leading into the pan out, get a pick and dig out as much of the rubber grommet as you can. I was not able to pull out the tube or even push it from underneath. I dug all the pieces out and the tube came out pretty easy.

MercFan · #6 11-19-2009, 10:54 AM

Quote:

Originally Posted by tubular031

If I have an electric helper pump, what the point of the hand pump (other then priming if the electric pump fails)?

Yeah, but how often do you have to use the Primer Pump manually?! Only once in a while after chaning filter then you don't touch it - electric one will work, but it's another thing that could break. Once a replacement manual pump is in place it will probably outlive the rest of the vehicle. My .02

Stevo · #7 11-19-2009, 11:16 AM

The new type hand primer pump is about $20 and once your fuel system is operating properly you probably wont need it till you run out of fuel or change filters.

tubular031 · #8 11-19-2009, 11:18 AM

Quote:

Originally Posted by Stevo

The new type hand primer pump is about $20 and once your fuel system is operating properly you probably wont need it till you run out of fuel or change filters.

where did you find it? allparts does not show a price they just have a quote link.

MercFan · #9 11-19-2009, 11:36 AM

Quote:

Originally Posted by tubular031

where did you find it?

This is what I replaced in mine:
http://www dot a u t o h a u s a z dot com - search for Diesel Primer Pump - as it won't let me post the complete url... PM me if you need the full link.

It's been leak free ever since and it works much better.

Stevo · #10 11-19-2009, 12:27 PM

Quote:

Originally Posted by tubular031

where did you find it? allparts does not show a price they just have a quote link.

Call Phil at "Buy Parts" at the top of the page.

tubular031 · #11 11-19-2009, 11:48 AM

I went under fuel pumps, pre fuel pump. that is where the quote link is. I emailed phil and he gave me the part number
BOSCH W0133-1715211 $16.22

I guess ill just order one on my next order. This car is going to nickle and dime me to death!

blackestate · #12 11-19-2009, 12:48 PM

I have gone to electric in the past for other reasons. It will work fine, but it is important that you find and fix the air leaks, They will turn into fuel leaks if you do not.

JB3 · #13 02-14-2010, 10:59 AM

on a related note- can someone tell me what size wrench is needed to remove the original stock screw in hand primer pump?

I have to go buy a wrench for this, and am not sure of the size

toomany MBZ · #14 02-14-2010, 12:09 PM

Quote:

Originally Posted by dropnosky

on a related note- can someone tell me what size wrench is needed to remove the original stock screw in hand primer pump?

I have to go buy a wrench for this, and am not sure of the size

Just use a pair of vice grips, you're tossing it out anyway, right?
But to answer your question, 24mm and you'll need a stubby.

barry123400 · #15 02-14-2010, 12:12 PM

Quote:

Originally Posted by dropnosky

on a related note- can someone tell me what size wrench is needed to remove the original stock screw in hand primer pump?

I have to go buy a wrench for this, and am not sure of the size

A dollar wrench cut down to fit in there for installation is fine. I think the size is 17mm. Usually just use vice grips on the old one to loosen it. Never use them to install the replacement. Someday I might get an old primer pump that is too tight to easily loosen with vice grips but not so far.