isc fuel pump? - Printable Version +- Rawze.com: Rawze's ISX Technical Discussion and more (http://rawze.com/forums) +-- Forum: Big Truck Technical Discussion... (/forumdisplay.php?fid=1) +--- Forum: Ask Your question... (/forumdisplay.php?fid=45) +--- Thread: isc fuel pump? (/showthread.php?tid=4774) |
isc fuel pump? - hookliftpete - 07-09-2019 Earlier this week I removed a couple of items from the exterior of the truck (2008 isc in a pete 335, just broke 100k miles) (auto tarp/gantry no longer used) which were making a whistle when driving above about 30mph. I thought that I could hear some other noises, but was unable to tell with the wind noises on the tarper. With that noise gone, I've got some sort of mechanical noise (metalic/clinking) which is audible above 1500 rpm and up. Gets louder with rpms, especially with fan/ac turned on. In the meanwhile, the fuel pump has had a very small leak. Is the pump likely the culprit? Truck does not start hard, mileage has been steady. I assume this thing does not have a ceramic pump like some of you with isx engines have... Checked the pulleys on the front of the block, nothing appears to be loose/sloppy. Also, cummins lists the overhead as needing done at 100k miles. Would that make noise if out of adjustment? When I did the injectors, everything under the valve cover looked good, no shavings or flecks, no wear that I could see. It's in for inspection Friday, but I'm hoping to have an idea as to what I'm in for before then, if this is a major issue...prob is, so I've learned over the last year. |