Firewall Question
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Firewall Question
Hi Guys,
I have a 1969 ford f-250 ranger, I am getting a tremendous amount of hot air coming through a hole in the firewall where the brake arm meets the firewall. Is there a gromet or way to seal this up that you are aware of??
Thanks
I have a 1969 ford f-250 ranger, I am getting a tremendous amount of hot air coming through a hole in the firewall where the brake arm meets the firewall. Is there a gromet or way to seal this up that you are aware of??
Thanks
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
There is a seal on the pushrod, but what air that could pass thru it, would barely blow out a match!
More than likely you need a new steering column seal. 1969: There are three different types.
I need to know two thing: With or without P/S? What is the last 6 digits of your trucks VIN?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
What brake "arm" passes thru the firewall? I don't know of any. The master cylinders pushrod has a rubber seal on it, but any air that could blow past it, would barely put out a match.
There is a large rubber seal at the bottom of the steering column, butts up against the firewall. If a tremendous amount of hot air is blowing into the cab, I would suspect this seal has been compromised.
There are three different seals, and since your '69 has P/S, there are two types used in 1969, Bendix & Ford. Before/from serial number D96,001 is the deciding factor, so the last 4 digits of the VIN are worthless to me.
There is a large rubber seal at the bottom of the steering column, butts up against the firewall. If a tremendous amount of hot air is blowing into the cab, I would suspect this seal has been compromised.
There are three different seals, and since your '69 has P/S, there are two types used in 1969, Bendix & Ford. Before/from serial number D96,001 is the deciding factor, so the last 4 digits of the VIN are worthless to me.
Posting Guru
Joined: Jun 1999
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You're both right. When the rubber boot that is supposed to surround the brake pedal rod/plunger that goes into the master cylinder ruptures or wears out, the boot draws up against the back of the master cylinder and you get a lot of hot air in through that hole in the firewall. I figured the part was obsolete when this happened on mine, so I didn't bother trying to source a replacement. I got a chunk of foam pipe insulation, cut it about 6 inches long and split it and used it to fill the gap around the rod/plunger...also put some lube on the side that surrounds the rod/plunger. It's long enough to stay put and lets the rod/plunger work like normal, plus no hot air in the cab unless I open the floor vents.
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