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Which starter motor for my car?

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gtc:
You have U2U.

Mattrix:
So now I just have to work out which one will be best without breaking the budget. I'm still yet to jack up the car and have a look at the bolt pattern (just haven't had a chance, probably will tomorrow though), but the Ecklers site has this one for sale for 1970 - 1981 models  - http://www.ecklers.com/corvette-engine-starter-small-body-for-automatic-transmission-cars-1970-1981.html - which is a staggered design. Have also found this one - http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=190518430342&ssPageName=STRK:MEWAX:IT - and this seller has some others too that are all similar and similar prices. All these starters look the same to me (in terms of quality) so I just can't tell which one I should get (and budget is important, because if it costs too much I'll put it off for too long and the poor car will just sit there!).

Mattrix:
So I ended up buying this one

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=310309235104&ssPageName=STRK:MEWAX:IT

And I had heard that you could replace old 9 tooth starters with new 11 tooth ones. Well, I bolted it all up, and it is grinding my flywheel horribly. For what reason, God only knows. I had thought that maybe I could pull the 9 tooth gear off the old one and slide it onto the shaft of the new one, however I can't get the new one's solenoid off (some weird, small star shaped heads on the bolts that I don't have a tool for), and there is a bearing preventing the gear from coming off the old one's shaft (can probably work out how to get that off, but am reluctant till I know what the problem is). So, I'm at a loss. And I don't really want to keep working on it till I figure out why it's not spinning the flywheel properly. I would be happy to wait out for an answer but for the fact that at the moment my daily is rooted (smoking beyond repair... crappy old falcon. Have tried everything but can't stop the copious amounts of smoke) and the Vette is the only car I can drive until I sort out a replacement. Daily has been rooted since Sunday, and I can't afford to not have a car on the road as I need it for work... :(

help

gtc:
Presumably the grinding you are hearing is because the teeth aren't meshing correctly. Reasons could include: pinion gear is the wrong pitch for your ring gear, or the pinion is too far from or too close to the ring gear, or the pinion is overshooting or undershooting the ring gear.

I note that the details for the starter you bought say: 'Drive Plate Size  11" or 168 Tooth', so that's pretty specific as to what it it supposed to fit.

In my experience, bad meshing will likely cause damage to the ring gear and that requires fixing by filing or replacement otherwise you get into a vicious circle of ring gear damaging pinion, and vice versa.

At this stage I would strongly advise getting it to a local Chevy mechanic. Perhaps the Northern region members can suggest somebody.

Reklaw:
Hi Matt, looks like you're in a spot of bother. Presuming it's the correct starter for your car (staggered design, tooth count etc.) then there's a few other possibilities.
1. There's some conjecture about the quality of some of the products sold by that vendor. Let's hope that there's nothing wrong with the new starter.
2. With some aftermarket starters, they supply you with shims to go between the starter & block. There's some specs about how much clearance you should have between the pinion and flywheel teeth, I forget the measurements, and the shims assist in correctly positioning the teeth. Did you get shims with the starter that you bought? If so, you might have to add shims and improve the mesh by trial & error.

As GTC says, you probably should get the car to someone who knows what there doing.
Unfortunately I don't know of anyone in Newcastle.
Bob

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