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3/4 breather is too small for LG4 valve cover??

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Old Mar 25, 2020 | 02:58 PM
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82Firebird5.0's Avatar
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3/4 breather is too small for LG4 valve cover??

Bought a 3/4” push in breather for the passenger side valve cover, but it is slightly too loose... not sure if the sizing is wrong or the grommet shrunk? Any help I’m keeping the pcv valve on the drivers side but getting rid of the stock air cleaner so the passenger one has to go
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Old Apr 21, 2020 | 11:33 PM
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Re: 3/4 breather is too small for LG4 valve cover??

Anybody?
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Old Apr 22, 2020 | 07:15 AM
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Re: 3/4 breather is too small for LG4 valve cover??

Try a new grommet first.
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Old Apr 22, 2020 | 12:45 PM
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Re: 3/4 breather is too small for LG4 valve cover??

Had this exact problem when I did mine. Old grommet had shrunk and hardened. New one fixed it right up.
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Old Apr 22, 2020 | 01:16 PM
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Re: 3/4 breather is too small for LG4 valve cover??

Originally Posted by WildCard600
Had this exact problem when I did mine. Old grommet had shrunk and hardened. New one fixed it right up.
Thanks! where’d you get the grommet at? What’s the right size that’ll fit snug into the valve cover?
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Old Apr 22, 2020 | 01:32 PM
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Re: 3/4 breather is too small for LG4 valve cover??

They have them at practically every parts store. Even AZ, Advance, etc. Hanging on a card in the PCV valve section.
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Old Apr 22, 2020 | 01:41 PM
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Re: 3/4 breather is too small for LG4 valve cover??

Originally Posted by 82Firebird5.0
Thanks! where’d you get the grommet at? What’s the right size that’ll fit snug into the valve cover?
Got mine at O'Reilly. It was whatever their catalog had as a direct replacement. I think it was Dorman 42062. I don't know if there is any difference between the old perimeter bolt valve covers vs the newer centerbolt in terms of breather grommets, be sure to check the part specs vs your valve cover to ensure you are getting one that fits.
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Old Apr 22, 2020 | 01:48 PM
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Re: 3/4 breather is too small for LG4 valve cover??

1 1/4 od

https://www.ebay.com/sch/i.html?_nkw...3B4+gromm.TRS0
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