Brake bleeder valve thread pattern

[dastrups]

Anybody happen to know the thread pattern for the brake bleed valves on the front and back calipers? I went with the full set from DF. I wanted to try the Russell Speedbleeder valves. I am seeing 10mm x 1.5 on some sites and 10mm x 1.0 on others so I wasn't sure which one it is.

 

[Gtstorey]

I don't think the bleeders are 10mm. That is likely the banjo bolts on the brake line.

 

[Gtstorey]

After doing some digging, it looks like I was wrong and they may be 10mm, although I don't remember them being that big. It looks most of the GM from that time was 10mm x 1.0. If someone has one loose, they can measure some threads and see. 1.00mm to 1.5mm should be pretty easy to measure for the pitch and then just a straight diameter measurement. If you can determine what the calipers came from (i think the rears are Solstice) this site may help.

Speed Bleeder Online Parts Catalog (showmetheparts.com)

 

[dastrups]

I don't think the bleeders are 10mm. That is likely the banjo bolts on the brake line.

I think you're right. I found that summit racing lists it as 8mm x 1.25 for the rear but not for the front. However the rear are solstice brakes like you said. Decided to take a chance and order the 10 x 1.

https://www.summitracing.com/parts/rus-639520/make/chevrolet/model/cobalt/year/2008