Broken crank keyway?

[wood6078]

That's all I can figure that's wrong with the beast. I was fighting timing issues for awhile. It wouldn't stay in time with a new t-belt, so figured cam sensor bad and replaced dizzy. Did good for about a day, so I reset the dizzy and took it for a test drive. On the way back home, it sounded like a belt squalling and then she died. I got to walk a couple miles and pulled it home. I figured the belt broke, but it's tight. Only problem - the crank turns w/o the cams. Only thing I can figure is the keyway broke for the crank gear. Is this common? But long story short, it's for sale. I figured I'd give you guys first dibs. I'll get a thread started in the for-sale section ina bit to let you guys see it. I was just wondering how common it is for the keyway to break.

[devonianwalk]

It is very common on the first gen 1.6L Mazda Miata. I'm not sure about the Pathy's though?

[5523Pathfinder]

Yes, its kind of common. You need to tear down the timing belt and inspected both keys(crank pulley and timing belt gear). Some have gotten away with a repair, some have had to replace the engine or at least the crankshaft. Inspect before you get carried away.

[MY1PATH]

I fill welded the broken areas and re-cut it to fit a larger keys. I did all this on the vehicle. I think I had 1x0.125" grinding wheel on the dremel.

[Precise1]

I've heard of it a few times, once by RedPath88, but didn't think it to be often, much less 'kind of common'. I bow to superior experience...

 

B

[MY1PATH]

In 10K I get to do the 94's belt. If I run into the same thing I'll know that it is common.

Edited August 23, 2011 by MY1PATH