C2 Ignition Switch

[Donald H.]

Question regarding function of 66 ignition switch versus 67 ignition switch

Per my AIMs the 66 ignition switch is 1116673 and the 67 ignition switch is 1116686.

Per the 67 TIM&JG - the ignition switch is checked to make sure you have to push the key in slightly to go into ACC.

I read in another thread that this was a change from 66 switch to 67 switch.

There is nothing in the 66 TIM&JG regarding this function and the key in my 66 switch does not need to be depressed to go into ACC. Is this correct functionality for the 66 switch?

The reason I ask is that I assume my 66 ignition switch is an aftermarket as there is no Delco-Remy logo on the bakelite end. But if it is functioning correctly I don't want to chase NOS or used switch. I saw an NOS on Ebay for $155 but there is not Delco-Remy logo in it either!!


Thanks,

Don

[Donald H.]

Re: C2 Ignition Switch

Also, are there any identifying markings on an original 1116673 switch?

I found one listed from Chicago based seller with a less than stellar reputation and if I decide to purchase it, I'll ask for some pictures.

Thanks,

Don

[Larry M.]

[David L.]

Re: C2 Ignition Switch

Also, are there any identifying markings on an original 1116673 switch?

I found one listed from Chicago based seller with a less than stellar reputation and if I decide to purchase it, I'll ask for some pictures.

Thanks,

Don

Don,

The 1116673 switch has the number "673" on the metal housing. GM # 1116673 was replaced with GM # 1116686 ("686" on housing) in May 1967 as per Chevrolet Parts History (service parts).

Dave

[Larry M.]

Re: C2 Ignition Switch

Don,

The 1116673 switch has the number "673" on the metal housing. GM # 1116673 was replaced with GM # 1116686 ("686" on housing) in May 1967 as per Chevrolet Parts History (service parts).

Dave

Dave:

Per my 1967 AIM, the "686" switch was shown on the ignition switch drawing dated May 1966. So I would have to say that it was used in production for the entire 1967 model year. It may have been released to "service" later in 1967 as you stated.

Larry

[Russ S.]

Re: C2 Ignition Switch

66 does not need to be pushed in(further)

[David L.]

Re: C2 Ignition Switch

The 1966 models (and previous year models) use the "octagon" key (#32318) while the 1967 models use the "octagon" key with the letter "A" stamped on it (# 320296).

[Donald H.]

Re: C2 Ignition Switch

66 does not need to be pushed in(further)

Russ, do you know if 66 judges check to see if the key DOES NOT need to be pushed in to go into ACC?

In other words, Can I get by with using a 686 (67 type), or will it fail ops since you need to push it in some to go into ACC?

Thanks,

Don

[Leif A.]

Re: C2 Ignition Switch

Russ, do you know if 66 judges check to see if the key DOES NOT need to be pushed in to go into ACC?

In other words, Can I get by with using a 686 (67 type), or will it fail ops since you need to push it in some to go into ACC?

Thanks,

Don

Don,

I can speak to a '67. When mine was judged at a the Lone Star Regionals, the judges checked to be sure the key had to be pushed in to turn to ACC. I'm going to bet that when they check your '66 they will want to be sure it does NOT need to be pushed in to turn...IMHO.

[Russ S.]

Re: C2 Ignition Switch

Don, It was never checked during four PV attempts and has never been checked in opps on my 66.

Russ, do you know if 66 judges check to see if the key DOES NOT need to be pushed in to go into ACC?

In other words, Can I get by with using a 686 (67 type), or will it fail ops since you need to push it in some to go into ACC?

Thanks,

Don

[Donald H.]

Re: C2 Ignition Switch

Thanks.

Even though the one I have isn't a Delco-Remy, it does functions correctly. So I may just leave well enough alone.

Don

[Peter L.]

Re: C2 Ignition Switch

Don - Per the Corvette 1966 OWNER'S Guide, OPERATING INSTRUCTIONS, IGNITION SWITCH (p.5), "The key must be pushed in while turning to the ACCESSORY position for operating the accessories when the engine is not running."

The original '66 "1116673" (embossed "673") & '67 "1116686" (embossed "686") Delco-Remy ignition switches used in Production had this feature; but unfortunately the version of the Delco-Remy ignition switch that came out as the replacement for the the '66 & '67 Corvette had the same p/n 1116686 & was embossed "686" does not have this feature. So, GM's practice of using the same part number for a differently designed part such as an ignition switch has a history & has presented serious issues recently.
From the Flight Judging perspective if the design feature is not observed in the Operations, I would expect a deduction to be assigned; but if the design feature is not observed in a PV, I would expect it could result in a failure if not corrected in the allotted time. And I would not count on it not being checked in a PV.
Pete

[Donald H.]

Re: C2 Ignition Switch

Don - Per the Corvette 1966 OWNER'S Guide, OPERATING INSTRUCTIONS, IGNITION SWITCH (p.5), "The key must be pushed in while turning to the ACCESSORY position for operating the accessories when the engine is not running."

The original '66 "1116673" (embossed "673") & '67 "1116686" (embossed "686") Delco-Remy ignition switches used in Production had this feature; but unfortunately the version of the Delco-Remy ignition switch that came out as the replacement for the the '66 & '67 Corvette had the same p/n 1116686 & was embossed "686" does not have this feature. So, GM's practice of using the same part number for a differently designed part such as an ignition switch has a history & has presented serious issues recently.
From the Flight Judging perspective if the design feature is not observed in the Operations, I would expect a deduction to be assigned; but if the design feature is not observed in a PV, I would expect it could result in a failure if not corrected in the allotted time. And I would not count on it not being checked in a PV.
Pete

Yep, I see that now in the owners manual. So I wonder what the difference was between 66 "673" and 67 "686"?

I checked the Ops section of the 66 TIM&JG and there is NO mention of depressing the key to go into ACC. However, the 67 TIM&JG states "The key should not be able to rotate into the ACCESSORY position unless depressed firmly into the lock while rotating".

Don

[Peter L.]

Re: C2 Ignition Switch

Don - The electrical operations end, i.e., external & internal contacts & mechanisms, of the original production "673" & "686" are identical; but the machining on the inside of the ignition lock cylinder bores are different. So, while the operation of the "push in" with the key to move to the ACCESSORY position is basically the same, there is a difference in that operation between the two original ignition switches.

Pete

[Russ S.]

Re: C2 Ignition Switch

Peter, Can a switch that doesn't need to be pushed in be converted to one that does need to be pushed in?

Don - The electrical operations end, i.e., external & internal contacts & mechanisms, of the original production "673" & "686" are identical; but the machining on the inside of the ignition lock cylinder bores are different. So, while the operation of the "push in" with the key to move to the ACCESSORY position is basically the same, there is a difference in that operation between the two original ignition switches.

Pete