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| | | Forums66 Topics128,050 Posts1,055,648 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Mar 2016 Posts: 21 New Guy | | New Guy Joined: Mar 2016 Posts: 21 | Hello, anyone out there know the diameter of the compensation port on the master cylinder. I can barely get a sewing needle tip through it. 46 Chevy half ton. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Jcb3, I do not know for a fact what the size is, but a number 60 drill is only .o4o, that may be the size. | | | | | Joined: Feb 2010 Posts: 86 Shop Shark | | Shop Shark Joined: Feb 2010 Posts: 86 | ddid you get an answer ? I just pulled a mc off a 41 and I can go look. Just remember that sewing needle mite be running into the cups and stuff in your mc. | | | | | Joined: Mar 2016 Posts: 21 New Guy | | New Guy Joined: Mar 2016 Posts: 21 | With the Mc empty and clean the comp port won't allow a ?
needle tip to pass ,maybe honing the cylinder pa rtially plugged it . Can drilling it out goof up anything | | |
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