Topic: Firewall detail

[bbs428]

Just got through painting the engine bay of the 69 mach 1 (San Jose) and it looks great...probably to good, 

 

But didn't the firewall get sprayed with the sound deadener also?  If so, was it complete coverage or?

[J_Speegle]

Just got through painting the engine bay of the 69 mach 1 (San Jose) and it looks great...probably to good, 

Seeing your car was around the 17xxxx's I've included some examples from that period below

But didn't the firewall get sprayed with the sound deadener also?  If so, was it complete coverage or?

Not sound deadener but an adhesive they used to seal all the openings. No it was not complete coverage, instead around or over every spot where there was an opening in the firewall was the plan except for the ground wire and screw which was added later.

Around (this time period and plant)

- heater wire, heater mounting bolts, heater hoses , any brake clip, throttle linkage, wire or electrical junction box, steering column, master cylinder or booster...you get the idea

[bbs428]

Spot on Jeff. Appreciate the pic's!

I got just the stuff to muck it up a bit, then I'll topcoat that.

Thanks mate,

Brett

[Anghelrestorations]

The 69 Assembly manual actually shows where to seal around the openings....and from what I have seen some cars had it put on real sloppy.  You would see some overspray on the wires and heater motor...and I think on the heater hoses as well if I remember correct. 

[specialed]

Jeff what is up with that rh brake line splice in your SJ photo a west coast thing as i see someone is selling 1 on e-bay.Dont recall that on dearborn i work on or is it manual drum brake thing?

[rockhouse66]

Jeff what is up with that rh brake line splice in your SJ photo a west coast thing as i see someone is selling 1 on e-bay.Dont recall that on dearborn i work on or is it manual drum brake thing?

Ed - you guessed it; the splice is a manual drum brake thing.

[J_Speegle]

I got just the stuff to muck it up a bit, then I'll topcoat that.

"Top Coat"

[specialed]

What is the purpose for it ? All cars i work on have disc brakes & lines are 1 piece . Are drum brake lines easy to install in 2 pieces?

[rockhouse66]

Ed - I am equally puzzled; must be something about the shape of the drum brake hydraulic line that makes it difficult or  impossible to route through the apron in one piece?  I haven't had mine apart to be able to answer that question, but it appears all drum brake cars are this way, with that union in the PS brake line.

[bbs428]

So the adhesive was the last thing sprayed on the firewall, over the paint?

[ruppstang]

The drum brake line has a U shape on the end that will not fit through the shock tower hole. Marty

[Anghelrestorations]

You can see better here the problem with that part of the brake line.  I thought it was a mistake the first time I saw it, but now see it on all 69 and 70 front drum brake cars....

[J_Speegle]

So the adhesive was the last thing sprayed on the firewall, over the paint?

It was sprayed on the firewall long after it was painted black, so yes - over the paint.

Guess it was just the term you used - no problem just wanted to be clear on my explanation

[J_Speegle]

You can see better here the problem with that part of the brake line.  I thought it was a mistake the first time I saw it, but now see it on all 69 and 70 front drum brake cars....

Correct - not a San Jose thing but a design used at all the plants for non-disc Mustangs

[specialed]

Makes sense after seeing marcus photo. I remember having a drum brake mach 1 years ago & after seeing the splice in the line i thought the line had a leak somewhere & somebody repaired it on the end