I have a Cummins ISC 350.
When it's cold it has a small fuel leak. After it warms up the leak stops. Any ideas what the problem could be.
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4 replies to this topic
#1
KURTDEN
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Posted 23 December 2012 - 07:22 AM
#2
DickandLois
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Posted 23 December 2012 - 08:33 AM
It sounds like a seal issue, but could you tell us where the leak is located. Fuel filter, fuel line, fuel pump area? Thinking the leak is in / or on the low pressure side of the fuel system if it seals up when the engine warms up. The other possibility is a leak in the fuel return path.
Rich.
Rich.
#3
peterdube
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Posted 25 December 2012 - 10:03 AM
I have a 330 ISC My lift pump did this.It left a spot in the driveway the size of a half dollar. It's an easy fix.Just tighten the 3 1/4" bolts 3/8 of a turn and problem solved!!! Use a 7/16 sprocket with an extension. Can all be done from top of engine. Should take 20 min. Very easy fix!!!!!!!!!!!!!!!!
GOOD LUCK
Peter from Maine
GOOD LUCK
Peter from Maine
#4
KURTDEN
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Posted 26 December 2012 - 08:02 AM
Thanks, I'll give that a try.
Kurt
Kurt
#5
KURTDEN
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Posted 29 December 2012 - 09:18 AM
I checked the 3 1/4 bolts on the lift pump, tightened them and have not had any more leaks. Thanks for the very helpful tip.
Kurt
Kurt
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