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Author Topic: Small vs large nipple smog check valves  (Read 1168 times)

Offline Oz390

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Small vs large nipple smog check valves
« on: September 13, 2011, 08:55:17 AM »
Was cleaning up two sets of OEM smog tubes and a few spare check valves I have and noticed two hose nipple sizes...

What were the OEM applications for the two variations?
« Last Edit: September 14, 2011, 09:42:41 AM by Oz390 »
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8R03S : 76A I 2A 15M 72 5 U
8R01S : 65A B 2A 28M 72 7 5 - Factory GT
8R01C : 65A M 2A 01E 72 2 W - Cal Special
8F01X : 65A I 2A 2G 20E 24 1 U - EXP500 repli-bute

Offline Oz390

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Re: Small vs large nipple smog check valves
« Reply #1 on: September 18, 2011, 11:48:52 PM »
Hmm.... no one? 
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8R03S : 76A I 2A 15M 72 5 U
8R01S : 65A B 2A 28M 72 7 5 - Factory GT
8R01C : 65A M 2A 01E 72 2 W - Cal Special
8F01X : 65A I 2A 2G 20E 24 1 U - EXP500 repli-bute

Offline TLea

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Re: Small vs large nipple smog check valves
« Reply #2 on: September 19, 2011, 12:45:48 PM »
The larger ones are service and maybe some assemblyline but not big block. They used the small nipple ones
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Tim Lea  Shelby concours judge MCA, SAAC, Mid America

Offline rockhouse66

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Re: Small vs large nipple smog check valves
« Reply #3 on: September 20, 2011, 09:59:18 AM »
I don't know the exact application list, but the large nipple ones were used on early CA smog on SBs and on Boss 302s.  The small nipple were later (like '67 I think) CA SBs and all 428 CJs.  Not sure which one the Boss 429s used but I think they were the small nipple like CJs.
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Jim
'66 GT FB
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