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Mod | | | Forums66 Topics128,113 Posts1,056,619 Members48,450 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | 1954/55-1st non-PCV valve covers had 4 slits in them for "breathing" (and they used non-breathing oil filler caps). Later 235s valve covers had no slits in them (and they used a vented oil filler-cap on non-PCV engines).
It was common for owners of slitted 54-55 valve covers to cover/seal the slits (and use a vented oil filler cap) because oil leaks out the slits and looks messy. | | |
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