My understanding is that it was a "mechanic mod" at first. Then later,
either the dealers or the factory did the work.
I have it on my '59 235, but it's not been done on a '55 or '56 235 I
have in the barn.
> [Original Message]
> From: Rob J. <rjjmsj@earthlink.net>
> To: _Old-chevy-truck <old-chevy-truck@onelist.com>; _Oletrucks
<oletrucks@autox.team.net>
> Date: 2/9/02 7:58:40 AM
> Subject: [oletrucks] 235 oiling ?
>
> I seem to recall from a previous thread, that there is supposed to be an
> oiling line behind the tappet cover. I finally had a reason to remove my
> cover, and took a picture (see link below). What I don't recall, is
whether
> or not this line was present in ALL 235 engines regardless of whether or
not
> they were solid or hydraulic, or maybe only present in those with solid
> lifters, but not hydraulics (and vice versa), or maybe only in certain
> years. In the picture, the green arrow points to a plug in what I suspect
> is an oil gallery going to the rocker arms, but in my case, is plugged off
> and not being used. I would think that somewhere in the yellow
highlighted
> area, should be another plug, but in my case, there is nothing, ie. not
> holes that I can see. I have had to route an external oil line from the
> rear of the block on the opposite side, around the back of the block, and
> plumb it into the rocker arm oiling setup at the green arrow. While this
> end-around approach has worked and gets good oil to the rockers, as long
as
> I have the engine down and being worked on, I thought that maybe I could
fix
> the lack of the oil line behind the cover. If anyone knows what should be
> there, and whether or not I could maybe tap a line in by drilling into the
> yellow area and tapping the hole for a fitting, or knows of anyway to get
> rid of the external oil line, I would appreciate discussing this with you.
>
> http://groups.yahoo.com/group/old-chevy-truck/files/Image07a.jpg
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
--- Mike
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