Hey guys,

i'm in mid resto in the UK and I've hit a snag. I have a'85 V6 SE and i can't seem to find out what the rear brake line end sizes are. I'm talking about the line which runs from the front end of the master cylinder to the 'T' pipe which is bolted to the rear axle. I need to know what size and thread each end is.

Really appreciate the help.

Thanks in advance
Rich

 

The master cylinder outlet sizes are:
Front Port of Master Cylinder - M12x1.5 bubble flare (goes to rear brakes)
Rear Port of Master Cylinder - M11x1.5 bubble flare (goes to front brakes)

1985 to 1992 Proportioning Valve inlet sizes are:
Inlet Port from Front Port of Master Cylinder - M12x1 bubble flare (goes to rear brakes)
Inlet Port from Rear Port of Master Cylinder - M11x1.5 bubble flare (goes to front brakes)

1985 to 1992 Proportioning Valve Outlet sizes are:
Outlet Port to Rear Brakes - M14x1.5 bubble flare
Outlet Ports (2) to Front Brakes - M10x1 bubble flare

1982 to 1985 Proportioning Valve inlet sizes are:
Inlet Port from Front Port of Master Cylinder - 7/16-24 inverted flare ??
Inlet Port from Rear Port of Master Cylinder - 1/2-20 inverted flare ??

1982 to 1985 Proportioning Valve Outlet sizes are:
Outlet Port to Rear Brakes - 7/16-20 ?? or 9/16-18 ?? inverted flare
Outlet Ports (2) to Front Brakes - 3/8-24 inverted flares

 

Wow! Thank you for that comprehensive reply. That's sorted me right out and the parts are on the way!

Many thanks again

 

Man I wish I saw this post a few weeks ago. I was having trouble figuring out my brake issue and i needed to replace the lines and needed to determine the fittings for the aftermarket lines I was installing. I don't know how often people need/want to do aftermarket lines but this is very helpful for that.

 

Not to start a panic, but the fitting on the prop valve for the rear 6mm brake line is 14mm 1.5 the fitting at the rubber flex bose at the back of the car on the same line should be 12mm

 

Thanks.

Is the below correct?

1985 to 1992 Proportioning Valve Outlet sizes are:
Outlet Port to Rear Brakes - M14x1.5 bubble flare
Outlet Ports (2) to Front Brakes - M10x1 bubble flare ??

I question the M10x1 bubble flare outlets now. I pulled together a lot of this doing a search online.

 

I'm pretty sure the front outputs are a coarser threat that 10 1.0