Catkev
New member
Hi,
I recently acquired 2005 2GM20F diesel. Previous owner stated that the engine was blowing black smoke so I suspected injection timing issues. Removed pump and injectors and had them professionally serviced. When I removed the pump I noticed one of the shims had been mangled and was partly folded on itself effectively doubling its thickness. This wouldn't have helped the timing. I bought a new set of shims and am now trying to set up the pump timing.
I seem to be not getting much fuel into the pump so I can do a spill test. Have throttle lever set at half open as noted in the workshop manual. The throttle lever has about 10-12mm movement when observed from the idle adjustment point. Is this a normal range of movement for this engine? I'm thinking the lever operation is controlled by the governor and the range of movement is possibly greater when the engine is running .
A related issue is that the injector pump has a return line set up. What I found was that when bleeding the fuel filter and injection pump fitting fuel pumps out the return line but doesn't seem to be getting into the pump. Have temporarily blocked off the return line in the hope that I can bleed air out of the system.
Would be interested if anyone else has encountered these issues on their engine and any guidance on how to get the pump timing sorted.
I recently acquired 2005 2GM20F diesel. Previous owner stated that the engine was blowing black smoke so I suspected injection timing issues. Removed pump and injectors and had them professionally serviced. When I removed the pump I noticed one of the shims had been mangled and was partly folded on itself effectively doubling its thickness. This wouldn't have helped the timing. I bought a new set of shims and am now trying to set up the pump timing.
I seem to be not getting much fuel into the pump so I can do a spill test. Have throttle lever set at half open as noted in the workshop manual. The throttle lever has about 10-12mm movement when observed from the idle adjustment point. Is this a normal range of movement for this engine? I'm thinking the lever operation is controlled by the governor and the range of movement is possibly greater when the engine is running .
A related issue is that the injector pump has a return line set up. What I found was that when bleeding the fuel filter and injection pump fitting fuel pumps out the return line but doesn't seem to be getting into the pump. Have temporarily blocked off the return line in the hope that I can bleed air out of the system.
Would be interested if anyone else has encountered these issues on their engine and any guidance on how to get the pump timing sorted.