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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!
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| | | | Joined: Nov 2001 Posts: 182 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2001 Posts: 182 | Can someone please tell me or post a picture of where a Chevy small block draft tube (vent pipe)is on the engine? I think this 327 of mine is supposed to have one but I can't find where it might have been blocked off. THANKS!!! | | | | | Joined: Aug 2000 Posts: 346 Shop Shark | | Shop Shark Joined: Aug 2000 Posts: 346 | Right behind the distributor should be about a 1" hole between the back of the block and the lifter gallery rear 'wall'.
'38 Chevy 1-1/2 ton
'49 Chevy 1/2 ton
'54 Chevy 6400 2 ton
'55.2 GMC 3/4 ton
'56 GMC 1-ton
No Room Left in Shop
| | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | don't have a pic rite now, Russ, but it's hard to miss if it's there - it's at the very back top, but by the 327 it was usually replaced w/ the fitting for the tubing that goes to a funky little PCV on the carb [not blocked off], so ya might not find the metal pipe that early SB's had that ran off the passanger side and pointed at the road
Bill | | | | | Joined: Nov 2001 Posts: 182 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2001 Posts: 182 | Hey, Thanks guys...Yea, I found it. That's where I thought it went. Mine is sealed off by what looks like a freeze plug. I've just added new valve covers with breathers that I routed to the air cleaner to get rid of some of the stinky blow-by. I also found a 'cap' that seals off the oil filler tube (it has a vent tube) that I also routed to the air cleaner. Hope it works. Thanks again...  | | |
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