Thread: Brake system

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All, I recently purchased a Dual-Reservoir Master cylinder from "Total Performance Inc." (BS-1531 1" piston bore) The tech guy at TP suggested that I use the "Tight Fit Master cylinder fittings for ease of installation" The issue I now have is that they leak brake fluid after sitting overnight. Have any of you used these fittings and encountered the same issue. The good old tech guy said they have never heard of this problem and that they have sold thousands of these fittings.

They are unable to give me a toqure spec or any consistant direction on the installation. One tells me to use teflon tap to stop the leak while another tells me to never use teflon tape.

Any help would be appreicated.

jc

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"New tight fit master cylinder fittings are designed for limited space issue problems. Will work on any GM or Ford master cylinder with 1/2-20 and 9/16-18 thread sizes. Great for additional clearance to crossmembers, transmissions and exhaust systems. These straight thread, 90 degree fittings only require the O-Ring washer to orientate the -4 AN fitting into the angle alignment desired."

http://www.tperformance.com/street_r...nder_fittings/
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if you over tighten them you may have smash the seats in the master or like denny said you may have bottom the nuts out before the fitting are seating look at the flare seats and make sure they are seating

Unless you're really close to the headers, a tight 90 degree tubing bend and an aluminum heat shield works well.

All, according to the tech guys "These straight thread, 90 degree fittings only require the O-Ring washer to orientate the -4 AN fitting into the angle alignment desired." I take that to mean you do not need to seat them and can position them in any direction you need to accomodate your situation. Am I off base here?

jc

Originally Posted by DennyW

Well, maybe not off, but I would think the O-ring surface would have to be a good matting surface for a good seal. If the casting is rough where they would make contact, that may be the problem. Most O-ring surfaces are grooved like a pocket for the O-ring to partially seat into.

ps: I have also ground the fitting on the end, if it did not seat in the proper position. I felt better having a matting surface (contact on the inner flare). They do build quit a bit of pressure if you have to stand on the brakes.

yes that is the way i see it. the amount of psi and no receiver for the o ring with a strait theads with no seat for the fitting to seat up to .you are using the o ring and not the way it was made to work .i would want more than that for a brake system