2nd gen F-body 9/16" rear brake line to Wilwood proprtioning valve

[cpd004]

I'm replacing my old master and proportioning valve with a new Wilwood unit. My issue is with the new proportioning valve. The original line to my rear brakes on the car is 9/16". Where this line connects to the new Wilwood valve requires a 3/16" line. I can't seem to find anything on line to go from the 9/16" Female to the 3/16" Male required by the new valve. I can't be the first to have run into this. Any help would be greatly appreciated.

This appears to be the valve I was sent:

http://www.wilwood.com/MasterCylinders/MasterCylinderProd.aspx?itemno=260-11179

[Skip Fix]

I'm betting the line itself is not 9/16 just the nut. GM made the different nuts different sizes so the assembly line guys could not hook them up wrong.

Options
1) fine an adapter through Dorman,Elman or other sources to neck down to the 3/16-might not be "pretty" but functional.
2) Get Inline, etc to make you a custom line with the correct line for the Wilwood.
3) cut the line and remove the 9/16 nut, put on the correct nut for the Wilwood and reflare to line.
4)Get a generic 3/16 line that its in the Wilwood and bend your own and use a flair coupler to connect it to remaining part of the factory line.

I want to think here someone posted a long list of brake line adapter numbers

[jamieg285]

Maybe a bit late, but the front-rear line on the 2nd gen is a 1/4 pipe. Not sure why this is so, but that is one reason why the fitting on the end is bigger.

[Apogee]

Maybe a bit late, but the front-rear line on the 2nd gen is a 1/4 pipe. Not sure why this is so, but that is one reason why the fitting on the end is bigger.

That's not really true...all you need to remember is that pipe is for poop. Automotive brake lines use tubing, which is sized by it's OD and wall thickness and uses SAE or ISO compliant brake fitting designs, not pipe threads. Most GM applications used 1/4" tubing for the front to rear line in disc/drum applications, so that's not really uncommon. The smallest tube nut size for 1/4" tubing is 7/16-24, however that doesn't mean that 1/2-20, 9/16-18 and others are not available as well.

Tobin
KORE3

[cpd004]

I was able to find the correct fitting way back when I was doing this. If I can find the info, I'll post it.

[JustJohn]

I had a similar issue. You should be able to get the correct fitting at any auto parts store. I ran a new line and had no issues.

[cpd004]

None of the local auto parts stores had it. I found it on Ebay from a brake parts supplier.

[cpd004]

Here it is:

http://www.ebay.com/itm/Brake-Line-Thread-Adapter-Male-3-8-x-24-Inverted-Female-9-16-x-18-Inverted-/331403268416?hash=item4d292c9140

[Apogee]

Standard auto parts store part as well, Edelman #258302, Weatherhead #7911, etc.

[Skip Fix]

Tobin and John- here most of the OReiley's and Autozone barely keep any fittings in stock anymore-or bolts for that matter. They will order them if you know the number since most the guys that work there can only pull up what eh computer tells them for one specific vehicle.


Case in point needed a shift cable for my 78 TA 400 Pontiac motor TH 350-over 100,000 were built. "Sorry computer shows that was not an option in 78" .Try a 77 -gosh same car and it shows up!

[Apogee]

Tobin and John- here most of the OReiley's and Autozone barely keep any fittings in stock anymore-or bolts for that matter. They will order them if you know the number since most the guys that work there can only pull up what eh computer tells them for one specific vehicle.


Case in point needed a shift cable for my 78 TA 400 Pontiac motor TH 350-over 100,000 were built. "Sorry computer shows that was not an option in 78" .Try a 77 -gosh same car and it shows up!

The trick these days at the auto parts store is finding someone behind the counter who is smarter than the computer...I fear that the days of finding a team of car guys with hundreds of years of combined experience behind the counter are nearing an end in most parts of the country. The rare few who are left are probably getting worked to death as we speak ;)

Maybe not so mercifully, we now have the internet.

Tobin
KORE3