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Bruce Lancaster · 10-17-2011, 08:59 PM

There are still alternative explanations possible! Cam, cam drive, pulley...
Test crankshaft "continuity" first; car in gear, distributor cap off. Push car forward, see if rotor turns. See if ratchet bolt that holds pulley up front turns. Does it turn when you turn pulley by fanbelt?? Is it loose or tight in crank?
Pull plugs...look in holes, push car some more. Do pistons move, or some pistons, or none??
I'm too tired now, but still lots of possibilities and tests to do. And if crank snapped...I would guess rear flange due to stress risers from seal.bearing mods.
Broken crank is alarmist until you have checked a lot of things...

10-17-2011, 08:59 PM	#3
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Day goes from good to bad in one shift There are still alternative explanations possible! Cam, cam drive, pulley... Test crankshaft "continuity" first; car in gear, distributor cap off. Push car forward, see if rotor turns. See if ratchet bolt that holds pulley up front turns. Does it turn when you turn pulley by fanbelt?? Is it loose or tight in crank? Pull plugs...look in holes, push car some more. Do pistons move, or some pistons, or none?? I'm too tired now, but still lots of possibilities and tests to do. And if crank snapped...I would guess rear flange due to stress risers from seal.bearing mods. Broken crank is alarmist until you have checked a lot of things...