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05-25-2016, 12:37 PM
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#1 |
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Registered User
Join Date: Sep 2014
Location: Toms River, NJ
Posts: 437
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Bleeder bolt size
I've been trying to search to find out what size bleeder bolts I need. My system is stock, rotors in the front drums in the back. 86 custom deluxe. I want to pick up a set of speed bleeders but I'm getting different sizes when I look on summit. Are the front and rear different sizes? Here's what I'm looking to get:
http://www.summitracing.com/parts/ru...olet/model/c10 http://www.summitracing.com/parts/ru...olet/model/c10 Thanks for the help! |
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05-25-2016, 06:56 PM
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#2 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,597
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Re: Bleeder bolt size
What size wrench do your current bleeder valves take? GM couldn't decide if they wanted to go metric or SAE in the 80s, so there's a little of both on our trucks.
As I recall, the metric version has 10 mm threads and takes a 10 mm wrench. The SAE version is 3/8"-24 and takes a 3/8" wrench. 3/8" = .375" 10 mm = .394" So if a 3/8" wrench is too small and a 7/16" too big, you probably have 10 mm bleeder valves.
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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05-25-2016, 07:02 PM
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#3 |
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Registered User
Join Date: Sep 2014
Location: Toms River, NJ
Posts: 437
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Re: Bleeder bolt size
Ok, so it's one or the other, not both. Makes sense but it wouldn't surprise me if it was both. I'll double check but i think they're standard. Thank you.
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05-26-2016, 09:29 AM
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#4 |
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Registered User
Join Date: Sep 2014
Location: Toms River, NJ
Posts: 437
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Re: Bleeder bolt size
I just went out and checked. The rear is 3/8, but the front is definitely smaller. 3/8 didn't fit and neither did 10mm. I went down to 8mm and 5/16 and the 8mm seemed to do the job. 1/4 was too small. I just want 1 thing to be relatively easy. I hate ordering the wrong parts, especially when they are only a couple bucks. It's a waste and sending them back is a hassle.
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05-26-2016, 03:28 PM
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#5 | |
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Registered User
Join Date: Sep 2014
Location: Manley Hot Springs Alaska
Posts: 253
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Re: Bleeder bolt size
Quote:
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