Alan - reading old posts, this one when you were a guest so a long time ago, I think you said the bolt that holds the starter brace on your late 64 to the block was a 5/16-18X1/2 indented head E with a dimple and gold in color which I interpert to be yellow cad or dichromate. Is this right? On my 64, #5788, this bolt is 5/16-18X5/8 indented LG with captive conical and yellowish plating which appears to never have been refinished. Just looking for an indication that it might be correct. My starter mounting bolts are also yellowish grade 8 indented...both of them.
Starter Brace Bolt - Alan Drake
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Re: Starter Brace Bolt - Alan Drake
Alan - reading old posts, this one when you were a guest so a long time ago, I think you said the bolt that holds the starter brace on your late 64 to the block was a 5/16-18X1/2 indented head E with a dimple and gold in color which I interpert to be yellow cad or dichromate. Is this right? On my 64, #5788, this bolt is 5/16-18X5/8 indented LG with captive conical and yellowish plating which appears to never have been refinished. Just looking for an indication that it might be correct. My starter mounting bolts are also yellowish grade 8 indented...both of them.
Larry-------
I've never seen a GM starter mounting bolt that was chromate washed (i.e. yellowish or goldish). I'm not saying none were so-finished but I have not seen one. This includes both original bolts as well as GM SERVICE bolts, old and later. However, I've definitely seen aftermarket replacement starter bolts (e.g. Dorman) that were so-finished.In Appreciation of John Hinckley- Top
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Re: Starter Brace Bolt - Alan Drake
Larry, does the starter bolt have a head mark? I am with Joe on the chromate wash, I have pulled hundreds of GM starters over the years and none with that coating. I think GM called out for it's spec. coating when its was off the norm. I think A dull Zinc or Cad. was the norm. Alan or Joe may have the book with the spec.sNew England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight.- Top
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Re: Starter Brace Bolt - Alan Drake
OK - I pulled my long one and it is a little yellow and the plating looks too good to be 52 years old....and both are grade 8 whereas I see a lot of sets for sale where the short one is grade 5....but to answer the question...they are indented hex with flange and six (grade 8) lines and a center "round" C...looks like an open O. I'll just replace them. While old ones may have been zinc they appear to be like worn black phosphate after the years in most of the pics I see.
But my brace mounting bolt is still yellow/gold. I'm going to attempt to find the Alan Drake post which said his was yellow. That's what my original question was about. And I failed to mention in my bolt description that the conical washer was also serrated.- Top
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Re: Starter Brace Bolt - Alan Drake
Well not sure what I was talking about however here is the bolt that attaches the starter brace to the block.Attached Files- Top
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Re: Starter Brace Bolt - Alan Drake
Here is what you said- Doing some last minute detailing in the starter area and would like to report my findings;
Please see AIM page D142, my comments are on 9 (the brace) and 11 (the shield) alone with their hardware. And please see bottom for my question!
Hear is what I found:
Screw 10 that bolts to block is a one piece screw with an angled lock washer molded into it (not sure of proper name) it is 1/2 head and1/2 in length. The lock washer has citrated bottom edges and a groove about 1/8 inch from outside edge making it appear to be two parts from a bottom look. The top of the head is recessed down about 1/16 inch with a 3/32 shallow hole in center. At 9:00 a raised letter “E” appears.
Screw 12 which holds the shield to the brace is a 5/16 head 3/8 long with a flat washer molded into it. Top is recessed with a large “G” and an “L” inside of the “G”.
Nut 5 is similar in construction to Screw 10, in that is also has angled lock washer molded into with same type bottom. Along the top of the washer a 1/32-inch raised marked can be seen opposite each flat of the head along the outside, except that the one at 3:00 is the letter “E”.
Brace, #9, has the letter “V” just above screw hole for 12 on the side facing the starter.
Shield, #11, on the flat area facing out (at right angle to screws) has a mark that looks to be CS and right beside that is the # 90.
All three hardware parts appear to have been a light gold, some still left.
Question – are they GOLD??
Just wanted to document since this area of car has not been touched.
Thanks
- July 12th, 2007, 11:34 AM
When taking pictures to document the bracket and shield area the markings on the shield were not as published;
Shield, #11, on the flat area facing out (at right angle to screws) has a mark that looks to be CS and right beside that is the # 90.
the markings is a double "SS" which are overlaped.
Seems the computer has a better eye than me, must be age. SORRY
- Top
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Re: Starter Brace Bolt - Alan Drake
Sorry Larry for my confusion, so from my post
"Screw 10 that bolts to block is a one piece screw with an angled lock washer molded into it (not sure of proper name)
Nut 5 is similar in construction to Screw 10, in that is also has angled lock washer molded into with same type bottom."
Both those parts are a single part, not separate bolt & lock washer, just a novice on nuts/bolts back then and still.
I have no idea where gold came from (but I said it) So here is the "Nut 5" also for your reference.
Attached Files- Top
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Re: Starter Brace Bolt - Alan Drake
Alan,
I always thought the starter brace to engine block bolt was what you pictured but it's been discussed here that the 5/16" bolt had a attached lock washer.
The fixed serrated washer on your bolt always seemed tight against the bend in the starter brace, have you noticed that?- Top
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Re: Starter Brace Bolt - Alan Drake
Tim, I have no problem with a tight fit of that bolt due to the bend in the brace. A couple of thoughts here, there are two of these starter braces that GM used, the 3816511 which was replaced in 10/17/63 with the 3851294 for use on the 64 corvette.
The 3816511 is listed in GM catalog as being 5 7/16" long while the 3851294 measures 6" (# not from GM catalog)
So we have two of these braces floating around throughout GM both being used into the 70's and both on various V8 engines.
I would look at some AIM's for Camaro or Corvair, but do not have, to see just what bolt they list. The 64AIM lists bolt 273867 which I find no listing for (have limited catalogs)- Top
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