'65 ground strap at firewall accelerator lever

[James R.]

Re: '65 ground strap at firewall accelerator lever

I have a 65 L-76. I just checked mine and I do not have the star washer on the accelerator lever.

Great discussion.

[Wayne M.]

Re: '65 ground strap at firewall accelerator lever

...., I can state with some certainty that loose star washers at ground screws were frequently left off (or put on the wrong side of the ground strap) because they were a PIA to install correctly.

John & others --- to illustrate your point about PIA, let's switch locations, [ref. '65 AIM, UPC 12, Sheet B3, Item 22 screw # 448645 and item 23 # 121753 lock washer] which ground the main under-dash harness to the underside of the birdcage just above the LH radio side panel (pic # 1). These are the same part #'s used for other radio grounding connections, as Michael H. has stated. However, these are almost always in pristine condition because of their sheltered location.

Pics # 2 and 3 show the screw off my '65 # 014xx (top) and '65 # 23564 (bottom). No washer on the latter (or tooth marks on either the bar or the eyelet), which may be explained by your PIA theory, especially since the guys couldn't wait to get out of the plant and go on vacation .

Also, you'll notice the screw on the late car has no self-tapping cutter lines, and maybe is NOT the # 448645 that the AIM shows for all these ground locations. The first pic is of the birdcage on the late car; note the ground eyelet was installed in the left hole; on my earlier C60 car, they used the right hole .

[William C.]

Re: '65 ground strap at firewall accelerator lever

So the washer on the 448645 is not a captured washer, correct, and thus if used should be called out on the AIM??

[John H.]

Re: '65 ground strap at firewall accelerator lever

Hi John
Theoretical question.....what if.....
the '63-6 accel ground screw actually had the captured "star" washer supplied as an assembly, wouldn't that washer be omitted from the AIM schematic?

Mike - If the screw had a captured star washer, it would be identified in the A.I.M. as a "screw assembly"; if not, it would just be called out as a "screw".

[Wayne M.]

Re: '65 ground strap at firewall accelerator lever

So the washer on the 448645 is not a captured washer, correct, and thus if used should be called out on the AIM??

Correct; the washer shown on the screw held in my fingers is separate, and J.H. has got your 2nd Q.

BTW, here's another use for the same screw # 448645 (per '65 AIM, U69, Sht A5, item # 3). No ground required as the band is just retaining the wax-coated capacitor cylinder. This is off my late '65, and the screw is the same as the top one I hold in the above post pics, which was on my earlier '65 car; ie has self-tapping cutting slots and no "L" headmark. So there goes the theory that all they had on that day was the OTHER type of # 448645 .

[Scott S.]

Re: '65 ground strap at firewall accelerator lever

Did a little research on this issue. The washer (#138489) shown in U69, sheet A3 between the ground strap eyelet and the accelerator lever appears to be an error in the 1967 Assembly Manual; that same part number is used in four other locations on the car, all of which are 3/8" split lockwashers (battery cable to solenoid, alternator bracket to exhaust manifold, etc.). Ground connections typically use external star washers, like the #121753 used at all the other radio ground locations.

edit:6-A212-A6C60-E3U69-A3

[Scott S.]

Re: '65 ground strap at firewall accelerator lever

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[Scott S.]

Re: '65 ground strap at firewall accelerator lever

Here's a pic of a NOS GM service replacement part purchased for a '67 427 435hp car, from back in the early 1970s. It appears to be cad plated.
Regrettably, the original GM parts number sticker fell of many decades ago.
I posted it.. in case any reader of this thread was interested. Years ago, I was dealing in NOS GM parts. This particular lever is one of the toughest big block Corvette parts to find in NOS condition. I've seen two or three in the last 35 years.
Ridge.

Ridge,

It looks like the NOS Accelerator Lever for L71 in your picture is a different part than the example on your L68. The '67 AIM says L36 (and L68?) uses Accelerator Lever GM 3901986 (UPC L36-A10). Adams says it was a new Lever for L36 in 1967 (p. 415).

The P&As call out both the small block Accelerator Lever (GM 3869750) for "67 Corvette (327, 427 H/Per.)" AND GM 3901986 for "67 Corvette w/H/Per. (427)".

I would expect to find the 435hp '67 Accelerator Lever in the P&A with a description like "67 Corvette (427, Sp. H/Per.)", but I don't see it. Do you know what the GM part number is for the 1967 L71 Accelerator Lever?