Good bye crankshaft.
#1
Good bye crankshaft.
Well I was stumped for a little while, I heard a little chattering sound, esp. on WOT. Looks like I retired this motor just in time. Happy 200,000 miles to it though Can't complain.
The gear actaully had 15-20% play, that explaines the trouble getting it timed right.
The gear actaully had 15-20% play, that explaines the trouble getting it timed right.
#4
Another vg motor is being put together. Nothing crazy, fresh seals, rebuilt heads, and all the bolt ons swapped over. I'm going to try a different intake, I'm maybe 1-2 months away from have it running again, I'll have something up about it then.
#6
Warping the shaft like that Caused the pulley wobble I had in the past.
The newer motor will have a light under drive pulley, so it would be impossible for this to happen again.
Last edited by goon9; 12-01-2007 at 08:36 PM.
#8
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Wow that crank shaft is pretty FUBAR'd.
Was the timing belt pully loose? I know mine wasn't when I changed my timing belt and that sucker wasn't coming off.
Thats also common on 89-90 miatas, and the end of the crank will even break off in extreme cases. Usually though the timing retards so far the valves hit the pistons.
~Alex
Was the timing belt pully loose? I know mine wasn't when I changed my timing belt and that sucker wasn't coming off.
Thats also common on 89-90 miatas, and the end of the crank will even break off in extreme cases. Usually though the timing retards so far the valves hit the pistons.
~Alex
#9
#11
Had something similar on mine, caused by a combination of issues, firstly the previous owner had installed a woodruff key which was far too small, then after time the main pully bolt came slightly loose, which allowed the pully to 'wobble' on the key, by the time I tracked down the cause of the noise, it had damaged the edge of the keyway on the crank, but fortunatly only the top edge, once I fitted the correct size key, it sat properly down into the keyway (where there was no damage), and has been fine ever since.
#13
Let me know if you have a pic of how a normal Max's crankshaft look like. I'm currently Googling it and getting cars that isn't a Maxima and even predates a it. (Like 57 Chevys, etc)
Before I get flamed, I mean from goon's picture point of view
Before I get flamed, I mean from goon's picture point of view
#14
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The inner notch just looks exactly like the outer notch. Goons problem is just the left side (our POV) is worn from a weak woodruff key, or something like that I don't remember the exact cause of the problem. Might be a loose main bolt not sure...
~Alex
~Alex
#15
Here's a photoshop how it should look.
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