Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks


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Oil cap on 235 valve cover..
#396275 10/10/17 09:57 PM
Joined: Apr 2017
Posts: 31
Tennessee
MickeyMickey Offline OP
Shade Tree Mechanic
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MickeyMickey
Shade Tree Mechanic
Joined: Apr 2017
Posts: 31
Tennessee
Please tell me if a 235 engine needs a "breathable" oil filler cap on the valve cover...
Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station
Re: Oil cap on 235 valve cover..
MickeyMickey #396276 10/10/17 10:00 PM
Joined: Jan 2002
Posts: 30,701
Likes: 141
West Allis,Wi.
Chev Nut Offline
ChatMaster - 25,000
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Chev Nut
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701
Likes: 141
West Allis,Wi.
It depends on the year. The 1954 and prior have slots in the valve cover to draw in fresh air. The 1955 and up had a breather type oil cap. The breathable oil cap was an improvement as it had an oil mesh to catch the dust.

Gene Schneider
Re: Oil cap on 235 valve cover..
Chev Nut #396278 10/10/17 10:19 PM
Joined: Apr 2017
Posts: 31
Tennessee
MickeyMickey Offline OP
Shade Tree Mechanic
OP Offline
MickeyMickey
Shade Tree Mechanic
Joined: Apr 2017
Posts: 31
Tennessee
Thank you...I have put a '61 235 engine in my '48 Sedan and the fellow working with me on the car put a non-breathable cap on the valve colors. I argued for a breathable cap but he insisted it did not need one. I will get a breathable one tomorrow...MH

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