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**AussieinNC** · 06-09-2020, 04:55 PM

I think the "check valve" you mention is actually the pressure spring that seats the filter against the carb body....

There are two different length filters, one short at one inch, one long at two inches....both if them have springs that seat the filter in the carb body.

If you still have the "check valve"...could you post a pic so I can be sure

There is usually no "check valve" in the inlet.

06-09-2020, 04:55 PM	#10
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,160	Re: 78 Suburban surging then dies on long grade I think the "check valve" you mention is actually the pressure spring that seats the filter against the carb body.... There are two different length filters, one short at one inch, one long at two inches....both if them have springs that seat the filter in the carb body. If you still have the "check valve"...could you post a pic so I can be sure There is usually no "check valve" in the inlet. __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox