ConcoursMustang Forums

Restoring - General discussions that span across many different groups of years and models => Drivetrain => Topic started by: Oz390 on September 13, 2011, 08:55:17 AM

Title: Small vs large nipple smog check valves
Post by: Oz390 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?

Title: Re: Small vs large nipple smog check valves
Post by: Oz390 on September 18, 2011, 11:48:52 PM

Hmm.... no one? 

Title: Re: Small vs large nipple smog check valves
Post by: TLea 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

Title: Re: Small vs large nipple smog check valves
Post by: rockhouse66 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.