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My starter has power to turn over the engine but somtimes it doesn’t engage right and makes a weird noise, then if I put the car in neutral roll it back and then it somtimes engages right and I don’t have it shimmed because I feel it looks like the starter teeth’s aren’t going far enough into the flywheel teeth so shims wouldn’t help that?
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
If its not going all the way in its 2 reasons
either it needs shimming becasue its binding, it needs a matchstick of depth between the top of the teeth and bottom of the next groove
or its just a bad design and it is at its max extension. I had a lot of issues with the latter and took a lot of shopping to finally get a good one. I bought mine from East coast auto electric.
I fried my good starter recently and needed a quick solution so I wouldnt lose any cruise time over the fourth....anotherlong and painful story... The rebuilder said it ould be ready beffore the fourth so I obviously had to get another, cause everyone lies and the only "good" starters the parts stores had instock was a proform mini starter. I had to clock it but It actually had decent engagement and more than enough power for the big block
The Bendix drive on the end of the starter shaft may have taken a 'dump'. If that is the problem, you can change ONLY the Bendix and keep the [working] starter, rather than replacing the entire starter system.
P.S. If the starter solenoid has many years of service, you MIGHT want to replace that, while you have the starter removed.