69427

Can someone tell me the thread size for the bleeders in the J-56 calipers? I'm looking to put some speed bleeders in them to speed up the bleeding/flush process.

Thanks for any help.

mr.beachcomber

This question should have been posted in the C4 Tech/Performance forum. You would have received a faster response. Here's the info that you were looking for: 10mm x 1.0/33mm long.

69427

I posted it here because there's a higher percentage of fellow track guys in this forum who bleed their brakes on a very regular basis (and frequently at the track), and are more familiar with maintaining their calipers and pads.

My Speedway Motors catalog shows a 10mm x 1.5 speed bleeder for GM applications. I'll do some digging around to see why the conflict in thread pitch.

I do appreciate the information.

mr.beachcomber

The Speedway Motors bleeder size that you are referring to is for the 1978 and up metric GM caliper that they sell. Your C4 came with PBR calipers, not GM calipers.