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40 chevy brake problem


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hmcbandit
Anonymous Poster
hmcbandit@comcast.net

Jul 3, 2006, 5:39 AM

Post #1 of 4 (2006 views)
40 chevy brake problem Sign In

I have a 1940 chevy coupe with a 78 camaro brake setup (discs in the front and drums in the back).I can't get any pressure when I try to bleed the brakes, I have a new master cylinder and brake booster and new front and rear brake cylinders. The only thing that is original from the camaro is the proportioning valve. I have tryed bleeding with the car running and without, any ideas?Thanks


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 3, 2006, 12:08 PM

Post #2 of 4 (1998 views)
Re: 40 chevy brake problem Sign In

Ok, let's rock here! 78 Camaro brakes: Master cyliner needs to be bench bled if it wasn't and you might be able to do that while it's in the car. If you didn't do that you could pump that pedal till hell freezes over and get nowhere.

I believe in 1978 Camaro you could get power brakes or not and the MC might be different and if the push rod isn't at the right spot that could be a problem. With just a finger and engine off there should be some free play and then some resistance pushing on the brake.

With a helper and cap off of the MC push on brake VERY SLOWLY and see if there's any action in the reservoir. Again go slow as it can make a geyser and you DON'T want brake fluid all over the place.

Another trick is to use vacuum (hand held) pump with clear line so you don't suck brake fluid into your pump when you see it coming. Take it off right away if that works. There is also a tool that clamps to top of MC and applies pressure that gets things going.

Hit back if you are still having trouble -- I see what else I can think of, T



hmcbandit
Anonymous Poster
hmcbandit@comcast.net

Jul 5, 2006, 11:33 AM

Post #3 of 4 (1991 views)
Re: 40 chevy brake problem Sign In

I hooked a couple of clear plastic lines to the master cylinder outlets and had a good flow of fluide but as soon as I hooked the hard lines back up I still had no workable pressure. Not to sure what's going on.

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Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 5, 2006, 4:08 PM

Post #4 of 4 (1987 views)
Re: 40 chevy brake problem Sign In

If you are comfortable the MC is properly bench bled then just let it gravity bleed to right rear first or longest line and along to shortest in order. If you have a helper the pedal MUST be held down till a bleeder is tightened up again or it will just just suck air back in. With all the new brake parts it's all air right now and takes a while to get it all out. If unsure about bench bleeding hit back and I'll give you all the procedures which usually come with a new MC. The clear hoses MUST be held in brake fluid or again you are just sucking air back in. We'll get there, T







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