Thanks John! Great info. I will try to unclog the proper passage, but since
this is setup for outside oiling, I wonder if there is any harm in having
two paths running at once just in case the other gets clogged again? As I
recall steam holes were so the thermostat would register the heat from the
rear of the engine faster on those really cold mornings.. or something like
that.
Thanks again!
Deve
----- Original Message -----
From: "john dorsey" <jrdorsey@strato.net>
Cc: "Ole Trucks" <oletrucks@autox.team.net>
Sent: Sunday, December 03, 2000 11:00 PM
Subject: Re: [oletrucks] 235/261 Heads
> Ok,
> To make the 235 head work on a 261 you have to drill the "steam holes"
> into the water jacket of the head. The easiest way is to take the 261
> gasket and mark the hole location on the 235 head. It's the same thing
> you have to do to use 350 heads on a 400. Sometimes I think that Detroit
> never comes up with anything new they just recycle old ideas! Lets
> see... Chevys used to use center bolts on the valve covers, then they
> went to edge bolts, now they are back to center bolts on the Vortecs :-)
>
> The outside oil line was an aftermarket accessory. I see them pop up
> NORS on the un-named auction site about monthly. Awhile back a guy had a
> whole box of them. I don't remember the brand, not GM but something
> you'd get at a FLAPS. I gather it was a really common mod on the low
> pressure dipper engines, probably when the passages were getting clogged
> from that non-detergent oil :-)
>
> --
> John Dorsey
> Wauchula, FL
> '49 Chevy Panel http://www.strato.net/~jrdorsey/truck.htm
> '52 GMC Firetruck http://www.strato.net/~jrdorsey/fire/fire.htm
> '51 Chevy suburban http://www.strato.net/~jrdorsey/burb/
>
>
>
> Deve Krehbiel wrote:
> >
> > I can accept that there is an oiler port for the rockers on the outside
of
> > this engine, but I dont see that on all 235's. This is a 261 (1959
model) so
> > maybe its normal. I am trying to ascertain whether or not the 261 motor
has
> > a 235 head on it. This might explain why the PO was having trouble
getting
> > oil to the rockers. When using a 235 head on a 261, there are two holes
that
> > need to be drilled in the head. I got that from Jim Carter. What I dont
know
> > is, what are those holes for? Maybe one of them is to provide an
internal
> > path for oil to get to the rockers? Since the manifolds are off, I
figured
> > now would be a good time to see if anyone here knows.
> >
> > Thanks again
> >
> > Deve
> >
> > ----- Original Message -----
> > From: "R. Welch" <rwelch@ionet.net>
> > To: "Ole Trucks" <oletrucks@autox.team.net>
> > Sent: Sunday, December 03, 2000 4:23 PM
> > Subject: Re: [oletrucks] In defense of the farmer
> >
> > > Well, I thought someone already posted to this issue. On an old 235 I
> > had,
> > > the rocker arm assembly wasn't getting any oil. I was told running
the
> > > tubing from the block up to the fitting in the head provided direct
oiling
> > > and was a quick fix short of tearing down the whole block and finding
> > where
> > > it was plugged. I don't think its any big deal - it seems to have
been
> > > commonplace. Now, why the hole is in the head to provide this relief
to
> > > begin with I don't know, but it obviously was put there by the factory
so
> > I
> > > assume it was foreseen as a potential problem by GM.
> > >
> > > Bob Welch
> > > '56 Cameo
> > > '55 Belair
> > > Bartlesville, OK
> > >
> > > ----- Original Message -----
> > > From: "Deve Krehbiel" <dkrehbiel@kscable.com>
> > > >... I am trying to figure out why my farmer
> > > > friend decided he needed a different oil line going up to the rocker
> > > > assembly.
> > > > Deve
> > > oletrucks is devoted to Chevy and GM trucks built between 1941 and
1959
> > oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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