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Mod | | | Forums66 Topics128,109 Posts1,056,269 Members48,439 | | 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!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Dec 2005 Posts: 2,557 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 2,557 | I just noticed a threaded plug on the passenger side of my 1956 235 engine. This plug is about three and a half inches in front of where the coil mounts.Is this some sort of oil port ? Keep in mind this 1956 848 head is on my 1954 261 engine.Should i be concerned about it ?
Thanks,Tim 1951 3100 Chevrolet1951 Chevrolet Suburban CarryallImage"A house is built with boards and beams. A home is built with love and dreams." "Look deep before you leap !!!" / "Everything is Everything" "If I say a mouse can pull a house, hitch him up"
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Tim,
That plug is in a hole that for some reason goes into the internal oil lubrication journal that I think feeds the rocker arm assembly (oil comes up to the head from the cam lubrication journal in a small diameter tube behind the push-rod side cover.
There is no need to be concerned about that plug, unless oil is leaking around it.
I think that some people have reported interesting (odd?) oil filter plumbing in which someone ran one of the oil filter canister lines from the other side of the engine to that hole.
Tim | | | | | Joined: Dec 2005 Posts: 2,557 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 2,557 | Ok,Thanks Tim. I remember seeing some inline sixes with the bee-hive oil filter on that side of the engine. Thanks again,Tim 1951 3100 Chevrolet1951 Chevrolet Suburban CarryallImage"A house is built with boards and beams. A home is built with love and dreams." "Look deep before you leap !!!" / "Everything is Everything" "If I say a mouse can pull a house, hitch him up"
| | | | | Joined: Jul 2006 Posts: 183 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 183 | Hey Tim, my PO had this installed on my 1956 235 w/848 head. Must have been an upper end oiling problem at some time. I'm just leaving it on for now.  Ed | | | | | Joined: Dec 2005 Posts: 2,557 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 2,557 | fredoly, where does that oil line go ? I'm curious how the rockers are fed oil .
I made a new rocker oil line tube (behind push rod cover)that feeds the oil up to the rocker oiler.I bought a double flare tool and it worked out great.
My old oil line tube was full of crud.I tried blowing 160 lbs of air through it,tried running wire through it,no success,made a new one. 1951 3100 Chevrolet1951 Chevrolet Suburban CarryallImage"A house is built with boards and beams. A home is built with love and dreams." "Look deep before you leap !!!" / "Everything is Everything" "If I say a mouse can pull a house, hitch him up"
| | | | | Joined: Jul 2006 Posts: 183 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 183 | It runs to a "T" off the pressure side of the oil filter. You can see it here . | | |
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