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Exhaust leak ?

605 Views 4 Replies 3 Participants Last post by  immattj
When it rains it pours! My a/c still on defrost my brake fluid disappearing I fixed that tiny hard hose or so I thought that goes to the firewall so took out my seats and pulled out my carpet to follow it inside till I got frustrated and walked away after a while I get under my truck just looking around and I see this! It's the bottom of my header gasket u ham see a gap where it's not sealed. Nothing is leaking out but could this be the source of my vacuum leak where my header pipes meet the engine? Or is that considered an exhaust leak and that's why I smell gas bad when I start it. Whatever it is it doesnt look right at all! See my pictures any advice?


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and that's why I smell gas bad when I start it.
. . . and an exhaust leak wouldn't cause you to smell fuel at start-up. You probably already know this, but that's something you really need to figure out--that could turn into a fire.
When it rains it pours! My a/c still on defrost my brake fluid disappearing
. . . and as far as the disappearing brake fluid, I guess the first check would be for puddles under your truck & if you find any, then trace the puddle to the applicable brake line and replace it. Here in the rust belt, I have wound up changing a bunch of brake lines on my old beaters.

But what I was really thinking about was a thread on one of these forums where the OP was losing brake fluid & couldn't find a leak and I think it turned out that fluid was gtting drawn into the brake booster (via the vacuum in the booster & a bad seal either in the booster or the master cylinder, I canot remember). That was a while ago I read that thread, and I have no personal experience with that happening to me, but that is what came to mind when I read about your disappearing brake fluid.
. . . anyway, as to that last post I made re your disappearing brake fluid--I got into the book a little bit to familiarize myself a bit, and "the booster unit consists of a single housing divided into two by a tandem diaphragm. . . . The booster pushrod, which connects the booster to the brake pedal & master cylinder, is attached to the center of the diaphragm."

ON EDIT: sorry, I was looking at the book some more and I think I got some of that wrong, hence I edited part of it out. Extending into the booster, from the master cylinder, is "the primary and secondary pistons." I am thinking that there must be seal(s) on the piston (much like a piston ring) that keep the fluid in the master cylinder and out of the booster. So I think what I must have read was that one of those seals must be where the leak occurs that lets brake fluid out of the master cylinder & into the booster where it gets sucked through by vacuum.
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