Engine rebuild (questions)

[phaetn]

Also, my car had already converted to an electric fuel pump in the trunk. Are you talking about taking the lobe off the aux. shaft? Why would you need to? Can it break without the fuel pump on it or just to reduce weight?

My suggestion is to leave the auxiliary shaft as is, and just make sure that your auxiliary shaft pulley (and thus the shaft) is timed correctly relative to the crankshaft rotation. The issue is that that lobe can hit one of the connecting rods (#3 if I recall) if the auxiliary shaft is timed incorrectly. In other words, get all pulleys timed correctly, and you'll be good.

-Bryan

Yes, the issue is the lobe can interfere with a con rod. To answer jon8christine, I suppose if it hasn't happened in nearly fifty years it's not likely to, but I suppose the danger is if the timing belt breaks and/or slips too much it's possible that the block be destroyed by the con rod perforating it. The 1800 is an interference engine anyway (valves) but they could be bent to hell without destroying the block. The 2L is not an interference engine with respect to the valves so the cams can stop while the pistons cycle without any damage.

Some would say leave well enough alone (especially as an oil plug has to be inserted into the shaft); others say if you're no longer running a mechanical fuel pump why leave a lobe that could cause a catastrophic failure, especially on a 2L.

Cheers,
phaetn

[phaetn]

Thanks to CanadaDan, the engine and transmission are out. Tomorrow or the next day we will take off the head and start seeing what we will need to order.


He says the Aux Shaft lobe for the mechanical fuel pump doesn't interfere on the 1800 engine, though it does on the 1600 and 2000. Does that sound right?

Thanks, also, to Dave M for the loan of the hoist.

Cheers,
phaetn