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Old 03-10-2009, 06:10 PM
whunter's Avatar
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Location: Metro Detroit, Michigan
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6010700146 Diesel fuel return valve/banjo bolt

Fuel injection pump starvation with good a good lift pump is becoming more common as the bypass valve spring gets weaker with age.
A weak bypass spring allows too much lift pump pressure to flow back to the fuel tank = starving the injection pump for proper fuel volume.

The solution is to install a new (or good used) bypass valve for your engine application.

Diesel fuel return valve/banjo bolt, back of injection pump by engine block, at nylon return line going to fuel filter housing.

MB# 6010700146
http://www.pelicanparts.com/cgi-bin/ksearch/PEL_Search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&description_side=0076030121 02&GoSearchSideFlag=&command=DWsearch&command=DWsearch&REFINE=Y&FORUM_REFER=&SUPERCAT_FLAG=Y&make=MB Z&description=6010700146&x=44&y=15

Application list:

OM601. 911, 912, 921, 940, 941

OM602. 911, 912, 930, 931, 938, 939, 940, 941, 942, 946, 947, 948, 961, 962, 990, 991, 993

OM603. 912, 913, 931, 960, 961, 962, 963, 970, 971, 972

OM616.963

OM661.911

OM662.911

NOTE:
You should replace the banjo bolt/valve seal rings at this time.

Two of the following
Seal ring
MB# 007603012405
http://www.pelicanparts.com/cgi-bin/ksearch/PEL_Search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&description_side=6010700146 &GoSearchSideFlag=&command=DWsearch&command=DWsearch&REFINE=Y&FORUM_REFER=&SUPERCAT_FLAG=Y&make=MBZ& description=007603012405&x=26&y=8


Fuel injection pump starvation with a good lift pump
Fuel injection pump starvation with a good lift pump

NOTE – All prices on special order parts subject to change without notice.

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Last edited by whunter; 11-02-2012 at 01:50 AM.
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