Lower Alternator Bolt Headmarks 70 sb no AC

[Bill L.]

My 70 had headers when purchased so no point of reference.

What is the finish and headmark of the pivot bolt?

What is the finish and headmark of the bolt that attaches the lower bracket to the exhaust manifold.

Were both of these bolts painted with the engine? I am thinking so as the bracket is orange. If so should they show some orange or did the bolts get changed out when the alternator was mounted?


Thanks,


Bill

[Edward J.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill, I would say the lower bracket was orange, the adjusting upper bracket was semi gloss black, the adjusting upper bolt WB grade 5 zinc, the lower bolt I am thinking a C for the lower. head marks could be a number of different ones as always with most corvettes an sometimes the finishes depending on year.

[Mike E.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill,
I will try to look at my L46 later today. Still going somewhat slow 5 weeks after heart surgery, but always looking for excuses to go to the shop. Good exercise, right?

[Mike E.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill,
Bolt to manifold (lower) is R S C, while pivot bolt is T R. Both are grade 5 (3radial lines) and neither has any indication of orange paint. Have fun!
Mike

[Bill L.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill,
Bolt to manifold (lower) is R S C, while pivot bolt is T R. Both are grade 5 (3radial lines) and neither has any indication of orange paint. Have fun!
Mike

Thank you Mike!

God Speed with your recovery.

Kind Regards,


Bill

[Bill L.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill, I would say the lower bracket was orange, the adjusting upper bracket was semi gloss black, the adjusting upper bolt WB grade 5 zinc, the lower bolt I am thinking a C for the lower. head marks could be a number of different ones as always with most corvettes an sometimes the finishes depending on year.

Thank you Edward!

Kind Regards,


Bill

[Edward J.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill, one other small note on the alternator adjusting bolt, its threaded end should extrude beyond the alternator ear, generally they are flush. so the thick flat washer and lock washer and bolt makes the correct bolt flush.

[Bill L.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Bill, one other small note on the alternator adjusting bolt, its threaded end should extrude beyond the alternator ear, generally they are flush. so the thick flat washer and lock washer and bolt makes the correct bolt flush.

Thank you Edward. That is what I have for the Adjuster bolt with SBC head mark.

Kind Regards,


Bill

[Mike E.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

As per the first paragraph of the 70-72 JG, p. 127

[Bill L.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

As per the first paragraph of the 70-72 JG, p. 127

I need to really get a copy of the new JG.

Kind Regards,


Bill

[Mike E.]

Re: Lower Alternator Bolt Headmarks 70 sb no AC

Actually, the JG doesn't talk about your question, Bill. It spells out Edward's answer to the question you didn't ask. Sorry that I confused things.
Mike