67 327 crankcase breathing system - Team Camaro Tech
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post #1 of 6 (permalink) Old Apr 15th, 19, 03:51 AM Thread Starter
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Kevin
 
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67 327 crankcase breathing system

In looking at various online pics of the 327 SBC engine, it appears that the scripted "Chevrolet" valve covers came from the factory. I noticed that these valve covers have no provisions for a PCV valve or tube that would run to the air cleaner. Did the 67 327 have a down draft tube in the back of the engine to allow the crankcase to breathe? Or, did the crankcase breathe through the oil fill tube and its cap?

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post #2 of 6 (permalink) Old Apr 15th, 19, 04:28 AM
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Re: 67 327 crankcase breathing system

There was an crankcase vent assembly under the intake



and a cap behind the dist and an inline PCV valve.





Fresh air came in through the oil filler cap at front of intake.
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post #3 of 6 (permalink) Old Apr 15th, 19, 05:24 AM Thread Starter
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Re: 67 327 crankcase breathing system

Was the other end of the PCV valve connected to the carb? Or air cleaner base?

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post #4 of 6 (permalink) Old Apr 15th, 19, 05:28 AM
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Re: 67 327 crankcase breathing system

Carb base.

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post #5 of 6 (permalink) Old Apr 15th, 19, 05:58 AM
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Re: 67 327 crankcase breathing system

The only part not shown in the photo above is a special hanger for the pcv valve that is held by one intake manifold bolt. Last i knew that part was not reproduced.

'67 rs - ordered new by my Grandfather
327 L30, K-K, Deluxe int, tach & gauges, 12 bolt posi, 4 speed.

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post #6 of 6 (permalink) Old Apr 15th, 19, 07:17 AM
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Re: 67 327 crankcase breathing system

Shown in the AIM UPC L30 A3 and UPC 6 C5. The bracket (3916337) Tom's referring to is now reproduced.
1967 Camaro PCV Valve Hose Retainer GM# 3916337 - 1967, 1968, 1969 Camaro Parts - NOS, Rare, Reproduction Camaro Parts for your Restoration

Al

my 67' build thread:
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