Ok...i'll start off with the fact im on my 3rd starter. I have a 67 chevelle 350. I have been having trouble shimming it correctly. I just bought a new starter from O'Reily's with a limited lifetime warranty. I've had this newer starter for about a week. Everytime i crank it, it makes the most horrible grinding and crackling noise ever. Well long story short. After Hourless Minutes Of Research Today I finally found out that the proper way to shim the starter for my Vehicle Is to ONLY Shim the Outer Bolt with Half Shims. So I Hop right under there and start off with 1 shim on that **** outer bolt. didnt start up **** or right till i had about 7 shims on it and whadaya know.. VROOM!! Just to make sure it was fixed I started it about 8 or so times..so no probs...So I Leave then after i get to my next destination.....Guess what i hear when i go 2 crank it again.....YEPP u guessed it ......HORRIBLE GRINDING NOISES. So Im like WTF. Might I Mind you Im in front Of My Girlfrineds House...so now i look like a total Bum that cant afford a mechanic work..(lol...which is partly true)....anywho...I add 3 more shims to that outer bolt. It was my last shim. So i get up hoping it worked. so I Give it a crank and it still sounded horribly grindly...but it DID start...so i left and went home...
As soon as i get home and home i called the Local Auto Store and ask a few ?'s...he said it should bolt on and workd good with no shims im like WTF i've tried everything from 1 WHOLE shim to 6 whole shims...none of them worked good until i started doin the HALF SHIMS to the outer bolt..anywho the guy was saying something about the teeth on the starter may be worn out. So i take a look at my flywheel and it looked good little wear nothing serious....then i pulled the starter and looked at the teeth. Im no expert but from all the test cranking and grinding the past few days on that **** starter the Starter Teeth look Wore and smoothed down at an Angle. So I think that the teeth on it are done for. Also The Guy at the store was telling me something about different starters with different starter bolt patterns couldnt make a Huge difference. I told him the starter Bolts are Diagonal....But Later as I Pulled the starter I also seen that there is another Hole Which is a straight across instead of diagonal.
Could This make a difference if i Got a Starter with straight across bolt pattern or diagonal bolt pattern?
Are my starter teeth worn out?