Alternator Mounting Bolt --

[Bill C.]

Hey ---

What would be a typical head mark for the 1-1/4" mounting bolt?
I have the incorrect aftermarket and want to get the right one for the car.

Thanks in advance.

[Edward J.]

Re: Alternator Mounting Bolt --

Bill, the correct markings is WB w/three lines , I asked this question a few months ago for my 72 sm. block. also I beleive that TR ,RSC. the bolt length is not suppose to extend pass the threaded end on alternator .a dark split lock washer and a .90 thick washer.

[Bill C.]

Re: Alternator Mounting Bolt --

Ed,

Thanks a BUNCH!

[Rich P.]

Re: Alternator Mounting Bolt --

Bill,

bolt is 1" not 1-1/4"

Rich

[Bill C.]

Re: Alternator Mounting Bolt --

Rich - thanks for the clarification.

Would you know if configuration that Ed mentioned for the size and color of the flat and lock washers are the same for a bigblock with PS?

[Rich P.]

Re: Alternator Mounting Bolt --

Bill,

yep it's the same. BB with PS just switches the mounting position but the bolt is the same. Sometime in 68 (I think) they switched from the star washer to a regular split ring lock washer. Also leaning more twards the grade 5 as opposed to the grade 2.

Rich

[Terry M.]

Re: Alternator Mounting Bolt --

Most of the 1969L to 1972 alternator adjusting bolts I see are WB, Grade 5, but here is an unusual one from a mid-production 1970. Please don't follow the herd and buy the reproduction WB Grade 5. It is all too obvious.

[Bill C.]

Re: Alternator Mounting Bolt --

Terry - Thanks.

I found this grade 5 bolt and purchased it. I have several other "rsc" bolts on my car.

It seemed feasible.