rd28t - tdc / fuel pump timing
Currently researching a top dead centre ( tdc ) and fuel pump timing issue on my GQ RD28T. I have a gregory's manual and a proper nissan workshop manual for the engine and both only indicate how to locate bottom dead centre (bdc ) and not tdc on the engine for replacing the timing belt. When replacing the timing belt you turn the crankshaft until the bdc timing mark aligns with the appropriate timing mark on the timing case cover and the marks on the fuel pump and camshaft gears align with their appropriate marks. However instructions for fuel pump timing state turning crankshaft to tdc and measuring pump plunger movement. The problem is, this tdc mark does not seem to exist - this appears to be a major oversight. I do understand there are other methods of finding tdc on an engine however omitting the important tdc mark serves to make the issue more complex than is necessary. Or is this a case of just is and deal with it. In addition the nissan manual seemingly causes confusion by instructing you to read plunger movement on a dial indicator when the engine is on number 1 tdc compression stroke and referring to specifications, however upon reading the specifications relating to injection timing it states the following - plunger lift : 0.86 mm +/- 0.05 equivalent to BTDC 8 degrees ( before top dead centre ). As for the gregory's manual there are no instructions for fuel pump timing. If it is BTDC 8 degrees the only way of finding that point without crankshaft timing case marks is using a degree wheel placed in front of the crankshaft and thus complicating the issue further. So there you have it. Is it 0.86 mm BTDC 8 degrees or TDC and how do you locate these points on the crankshaft? Or I am overlooking something obvious. For anyone with experience on the RD28T engine and has confronted a similar issue, your feedback would be greatly appreciated.