I realize that this is an older thread but I had/have the exact same problem - wobbly balancer after installing new crank bolt.
I have a 1991 Montero 3.0 with 133,000 miles - all original. It had the "old style" crank bolt in it and after reading threads on this forum, I decided to have my mechanic install the "new/correct" style crank bolt and washer (part #11A01A022 - bolt; MR994412 - washer). During a timing belt replacement, I provided my mechanic with the new style bolt/washer and when he gave the car back to me, it had a rattle/wobble at the balancer/crank pulley. He removed the bolt and installed another bolt he had on hand (similar to the longer old style, incorrect original bolt) and the wobble went away and all is fine for now.
That said, I now have a random crank bolt that is not the original, long bolt nor is it the correct newer style bolt/washer but the car is running perfectly (no wobble/rattle).
My questions are:
1) For my 1991 Montero 3.0, are part #'s 1101A022 (bolt) and MR994412 (washer) the correct part #'s for my application? I'm pretty sure they are correct but wanted to double check.
2) The new bolt/washer (1101A022/MR994412) was installed with the chamfered side of the washer facing the bolt head - is this correct or do I have it backwards?
3) Since the car is running correctly right now with the random, non-original crank bolt, should I leave it as is and be happy?
Thanks.