First step to checking the timing is to remove the dist cap so movement of the rotor can be seen.
Next I rolled the engine over until the timing mark on the harmonic balancer is in view.
Next I rotated the engine one way until the rotor just moved. The mark is at the 8 degree BTDC mark.
I then rotated the engine back until the rotor just moved. The mark now rests at the 4 degree mark ATDC. So a total movement of 12 degrees.
Not good. From what I have read 4 or 5 degrees is normal wear. In a pinch up to 10 degrees might be OK if the engine is running smooth. 12 degrees is just too much. At idle my timing chain is flopping about and causing valves to open and close at the wrong time – thus the very rough idle. Once the engine is above 900 rpm or so it smooths out as the torque of the engine is keeping the timing chain taught. That explains why all my plugs are firing OK.
I will continue to drive the car this summer as is. I don’t plan any long trips. All I really need to do is have the alignment done, a new windshield installed and then a safety check so I can get it plated.
My project for next winter was an overhaul of the PS pump, control valve and piston. I need to replace the PS pump bracket so I’ll do all that when I install a new timing chain and gears.