Topic: 1970 Dearborn Choke Cable Grommet for Alternate Factory Location?

[Mike_B_SVT]

Hey Fellahs,

I'm interested in getting some sort of grommet for the choke cable on my '70, which is missing.  But my cable doesn't route through the "normal" hole.  In fact, I don't even have a hole cut in the normal location!  Lazy line worker?  Maybe.

So I've found a few possible options for a grommet, but I'm not sure how well they will actually fit in the hole.  Any insight would be appreciated.

https://secure.cougarpartscatalog.com/380634-s.html
Speedo Cable Grommet - Replaces Ford part number 380634-S.

https://www.npdlink.com/store/products/grommet_rubber_repro-169675-100.html
GROMMET, Rubber, repro, fits both antenna cable at cowl and choke cable at firewall.  353626-SA

If worse comes to worse, I could just go with punching a hole the normal body plug that most folks have in this spot. 
Offhand, does anyone know what size or part number this plug would be?

Here is a pic of my firewall ~ you can see the dimple where the hole was supposed to be cut.

[7Lscjracer]

Original choke cable grommet was 379160-S, but I don't know the size.
That hole looks like it would fit the typical body plugs seen elsewhere on the car.
You could make a hole in the center of one of them easily enough with a hollow punch.
Last I checked, the grommet wasn't repro'd which is odd since the choke cable is.

[jwc66k]

Original choke cable grommet was 379160-S, but I don't know the size.

Did you check the 69-70 Mustang Hardware Spreadsheet in the library?
Jim

[7Lscjracer]

Did you check the 69-70 Mustang Hardware Spreadsheet in the library?
Jim

Not in this instance, I'd made note of the part number some years ago when wading thru an assembly manual.

[Mike_B_SVT]

I did some more digging after I posted and found some info that Ed Meyer posted a while back on the Boss 302 forum;
http://www.boss302.com/smf/index.php?topic=74795.0

It sounds like there were two styles of grommet used, and a change in late '69 (early '70 MY).

Manual choke '69 & '70's appear to have used one of the following;

- a 1/2" hole just above the throttle cable, with grommet 379160-S
http://www.mansfieldmustang.com/03-26.JPG
*White sleeve is used for throttle cable on '67 cars (as I understand it).

- a 1" hole just above the wiring harness, with grommet C7OZ-18912-S (5?)
https://www.npdlink.com/store/products/grommet_rubber_repro-169675-100.html
http://dennis-carpenter.com/antenna-lead-wire-grommet/p/C70Z-18912-S/

[jwc66k]

Did you check the 69-70 Mustang Hardware Spreadsheet in the library?

Not in this instance, I'd made note of the part number some years ago when wading thru an assembly manual.

In this instance you should. Listed there are some measurements and a reference to source with a picture.
Jim

[J_Speegle]

Interesting question since it appears that the hole is missing and the original grommet might not seal

I think the challenge would be where the grommet would have come from since the one typically used of wiring passing through the firewall would have been preinstalled at the sub contractors making the wire looms. Far, far away from the assembly plant so its not like anyone could run and grab and "extra"  Just thinking out loud

Always possible since the grommet was already on the cable that it just got shoved through the other hole and left unsealed or with a poor seal. Would check to see a worker might have thrown some dum-dum around the hole or tried some other way of quickly sealing it to keep things moving


Did look at other 70 Dearborn Boss 302 equipped cars built around the same time as your car was built and all the others had the normal hole in place and in use just in case your was possibly not the only one to get missed 

[7Lscjracer]

353247-S-A2   0   N.L.   ?GROMMET?   GROMMET,INSULATING,ROUND   1   CHOKE CABLE@FIREWALL,B302

This is all I could find in your spreadsheets Jim, but that 353247 number is news to me.
Looked at the new one from last Nov. and then the other one in the post underneath.
Where should I be looking to see the link to hardware pics also?

[jwc66k]

Part number 353247-S-A2 is shown in the 1969 Mustang Electrical Assembly Manual (AM0028) page 10 (ref E9-125-3) item 2. I've found no other reference to that part number. For the same application in 1970 (AM0033 pg 13, ref E0-125.3), grommet part number 379160-S was used. It's measurements (from 69 Ford Standard and Utility Parts, AM0205, pg 58) are    1/4ID,1/2OD,5/16T(NO OTHER DIMENSIONS). The service replacement for both 69 and 70 applications is 379009-S (same page as 379160-S).
It is common for Ford Engineering to find a part to use, only to discover that the source cannot supply it for any number of reasons, so a replacement is used. The next model year gets the same treatment, service somehow solves all those quirks with something else. Many times the replacement will "fit", same size mounting hole, same size hole for the choke cable, but the thickness is different. Those are observations, not documented. That's the best information I can find.
Jim

[jwc66k]

Some additional research has turned up a service "replacement". It's the same grommet used on 64-66 small blocks accelerator pedals to the accelerator arm, part number 379009-S (see NPD https://www.npdlink.com/store/?p=catalog&mode=newsearch&search_str=9A703-1A&parent=1&year=1966 - There are additional items in the "kit".) Will it work? Ford says yes. Can you tell it's a replacement? I won't say a word. If I was going to use this grommet, I would consider using weatherstrip adhesive (like 3M8008) to keep the grommet in place.
Remember, I won't say a word.
Jim

[7Lscjracer]

Thanks for all the legwork on this Jim.
An excellent, indepth explanation.
I would say this is the definitive thread on manual choke cable grommets to be found on the interweb.