RE: [ihc] Re: Hastings low oil pressure tip

["John M. Adams" <jma@xxxxxxxxxxx>]

Kurt and Larry, Thanks.

I hope you don't mind, but I'm copying your responses to each other and back
to the list. I really want to understand this one, and though your info is
helpful, it also adds to my confusion somewhat. In Kurt's two blocks,
there's either a hole, or there isn't. When there is a hole, and you use the
gasket with the matching hole, and you have low pressure, Hastings says to
plug the hole. (Perhaps the idea there is that an "un holed" gasket would
not hold the oil. That answers my gasket design question, I think.) Anyway,
you plug the hole in the filter base, and that somehow increases the oil
pressure. But in Larry's experience with the IH mechanic, he's reducing the
size of the hole, not eliminating it altogether. That makes sense to me, as
a means to increase pressure in the flow of oil, but plugging the hole
completely still baffles my poor brain.

Anybody else care to chime in on this?

Thanks...

John A.



> -----Original Message-----
> From: Kurt Musgrave [mailto:rvar@domain.elided]
> Sent: Thursday, August 19, 2004 12:35 AM
> To: jma@domain.elided
> Subject: RE: [ihc] Re: Hastings low oil pressure tip
>
> John, I can help a little on this, but I'm a bit unsure as well.
> I have in
> my shop a 266 block out of a 62 C120, and also a 304 block from a 59 B160.
> On the 266 block where the oil filter base bolts to the block there is an
> extra 1/4 in. drilled hole that is not in the other block.  I cannot find
> the oil filter base that was on the 266 block (it's here somewhere I am
> sure) so I don't know if it had a corresponding hole that lined up or not.
> But, I can sure see if I was to bolt the filter base from the 304 onto the
> 266 block using the gasket from the 304 there would be a direct
> passage from
> the pressure port thru that hole to sump.  Obviously it was not
> on all early
> engines though, as it sure isn't in the earlier 59 304 block.  I will look
> thru my stuff and see if I can find the oil filter base from the
> 266 and if
> it's different I get some pictures posted so all can see the difference.
>
> Kurt
>

> -----Original Message-----
> From: Larry Ruebush [mailto:lrt@domain.elided]
> Sent: Thursday, August 19, 2004 6:38 AM
> To: John M Adams
> Subject: Re: [ihc] Re: Hastings low oil pressure tip
>
> John
> I'm like you, don't really understand it.
> We had a C IH tractor when I was in high school that ran low oil pressure.
One of the mechanics at the IH dealer told me to put a plug in > > the
return oil line at the filter and then drill a hole in it about half the
size of the original hole. Worked all the rest of the time we > had the
tractor.
> Larry Ruebush
> west central IL