I bought a rebuilt and supposedly correctly dated starter for my 70 300 HP automatic- correct part number per judging guide 1108430 dated O B 2 /all correct part# and date , the JG says it should have a aluminum nose with no paint- but this one has steel nose that has a bolt on pattern different from my engine. Can I unbolt the nose off my old improper dated starter and bolt it on the rebuilt proper dated starter ? What bolts get undone. I have never taken a starter apart- THANKS
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Re: 70 SB auto starter can nose be removed?
Remove the solenoid first. Then remove the two long bolts on the rear of the starter (opposite the nose), unscrew those and the nose will sort of fall off, you'll have to wiggle the nose off the bendix.
Gary B -
Re: 70 SB auto starter can nose be removed?
Be carefully not to let the shaft move while making the swap. If the shaft moves forward too far, the brushes will come off the commutator. You will then need to dismantle the starter, hold open the brush springs, and reposition the armature back in place.
I 3d printed a sleeve to aid doing this for my starter rebuilds.Comment
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Re: 70 SB auto starter can nose be removed?
Bob------
If the 1108430 starter has a cast iron nose, then it's been "reconfigured" somewhere along the way, probably when it went through a commercial rebuilding operation. Your starter should, indeed, have an aluminum nose. The correct nose is retained by TWO bolts, EACH 4-21/32" in length.
However, I do not understand why the cast iron nose starter will not bolt up to your block; it should bolt up to your block but it will not correctly engage your ring gear. Most 62+ blocks will accommodate any of the 3 different starter noses used in the C2-C3 period.In Appreciation of John HinckleyComment
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Re: 70 SB auto starter can nose be removed?
Could the issue be that the starter might be for a manual transmission?Comment
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Re: 70 SB auto starter can nose be removed?
Justin------
The GM #1108430 starter was a standard torque starter applicable to small block 1970-75 THM400 applications. As produced by Delco-Remy, this starter part number was equipped with an aluminum nose of GM #801188. However, the starter frame (the cylindrical steel component with the stamped part numbers on it) can easily be reconfigured with a cast iron nose and other parts to work with 69+ manual transmission applications.
Commercial rebuilding operations disassemble starter cores to their component parts and, then, build up rebuilt starters to whatever specs they need. When this occurs, it's only the "luck of the draw" that the completed starter will match the specifications of the part number stamped on the frame. Usually, they will not. In fact, a starter part number for, say, an Oldsmobile application might be reconfigured for a Chevrolet application. So, in the world of commercially rebuilt starters, the part number stamped on the frame means nothing. In fact,apparently to avoid confusion, lately I've noticed that some commercially rebuilt starters have the GM number on the frame ground out or covered with an adhesive foil tag showing the rebuilders catalog number.
The exact same thing is equally applicable to rebuilt alternators.In Appreciation of John HinckleyComment
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Re: 70 SB auto starter can nose be removed?
Joe, I think you are correct, the commercial rebuilder I bought this starter from apparently put a steel nose for a 4 speed on figuring most 70 Corvettes were 4 Speeds- my car is automatic SB A/C etc etc Any body have a aluminum nose that fits this for sale ?
THANKS ALL- BobComment
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Re: 70 SB auto starter can nose be removed?
Bob------
You could remove the nose from the incorrectly numbered starter you have and transfer it to the 1108430 but you'd also need to transfer the armature from that starter to the 1108430 as the armatures are also different.
Here are the parts you need if not recovered from your old starter; (nose here is replacement, non GM):
In Appreciation of John HinckleyComment
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