Fuel leak on injection pump - Dodge Cummins Diesel Forum

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post #1 of 8 (permalink) Old 04-02-2012, 01:09 PM Thread Starter
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Fuel leak on injection pump

there is a little rubber tube that runs out of the pump on the back side and i think it is like an over pressure valve of some sort...but anyway it is spraying fuel put of ther when i drive but not at idle or even then i rev it up...it only leaks or sprays when im on the road


1990 Stock W350, 360 getrag, pump mods, straight pipe
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post #2 of 8 (permalink) Old 04-02-2012, 04:03 PM
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The O-ring is leaking on the pin that rides on the fuel pin.

2014/93 W350 DRW, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, G56 SBC Con-OFE, 3:07's axles, 2" skyjacker lift, air ride rear suspension,B&W flatbed
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post #3 of 8 (permalink) Old 04-02-2012, 10:52 PM
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Classic problem when you start messing with the fuel pin.

93 W250 LE Club Cab, AT, 3.91 Sure Grip, DE 4"exh, Cooler Tubz, BHAF, Gauges, POD's, M&H timing spacer, Gillette Diesel fuel pin & 60cm compressor, Star wheel turned, Power screw maxed, KDP and case bolts fixed, WVO conversion, Skyjacker, Rancho's
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post #4 of 8 (permalink) Old 04-16-2012, 01:54 PM Thread Starter
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how hard is it to replace and should i be worried about anything else in the pump...might as well replace anything else if i have to get into the pump

1990 Stock W350, 360 getrag, pump mods, straight pipe
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post #5 of 8 (permalink) Old 04-16-2012, 02:17 PM
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its not that hard to replace, i just did one. if you can do a gov. spring, you can do the fuel pin o-ring. here is a post to help you out.

Fix That Leaking Fuel Pin - Midwest Diesel Connection

1988 ramcharger w/ 1993 12v and 5 spd getrag, phoenix friction stage 4 clutch, denny t stage 2, s300 over a schwitzer 4lhr-753, DAP 5x.013's, 3200 spring, 140 gph lift pump, mighty diesel head bolts, Glowshift 3-in-1 gauge
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post #6 of 8 (permalink) Old 04-16-2012, 02:24 PM
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Fred D Where hid you get your seal kit from, and a part No.

92 D250 custom made bed, 190 inj., 16cm , electric cooling fan, 2nd gen air horn, 5spd., Dana 61 3.31 gears, 1 stage W/M set up

97 2500 4X4 auto DDP 40 HP injectors, no 8 fuel plate, homemade 3" intake horn, BD converter, BHAF, electric cooling fan
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post #7 of 8 (permalink) Old 04-16-2012, 02:33 PM
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funny story on that. I got the kit on ebay, a full reseal kit it said with the 3200 gov spring. Well I looked for the seal small enough for the pin and there wasnt one in there that would fit the pin snugly, they were all too big. So luckily I have a kit of o-rings any size imagineable and got lucky as there was one in there that fit. I believe the dimensions for the o-ring are on the thread i had posted.

1988 ramcharger w/ 1993 12v and 5 spd getrag, phoenix friction stage 4 clutch, denny t stage 2, s300 over a schwitzer 4lhr-753, DAP 5x.013's, 3200 spring, 140 gph lift pump, mighty diesel head bolts, Glowshift 3-in-1 gauge
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post #8 of 8 (permalink) Old 04-17-2012, 12:56 PM Thread Starter
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i have a kit like that too, ill probably do a gov spring and denny t fuel pin while im at it

1990 Stock W350, 360 getrag, pump mods, straight pipe
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