235/261 Pressure Oiling
By
Bruce "Phat" Childs
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235/261 Pressure Oiling |
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By
Bruce "Phat" Childs
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When you're runnin' down the road tryin' to loosen your load, does it ever worry you that your trusty ole Stovebolt may not be getting enough oil pressure? Ole Phat has fired up the shop and will walk you through turning your favorite 235 or 261 into...
A full pressure oiler!
| Tool list | Parts list |
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This is how I have done the full pressure oil filter on the 235/261. I don't suggest you do this unless the motor is completely apart for a rebuild. With the drilling and tapping there will be too many metal chips to do this on a motor that is already built.
All of the drilling and tapping will be done on the oil pump side of the block.
Get a 1/8 NPT tap. Now,
go about 1.375 in the hole (being careful not to damage the threads for the
pump fittings). Tap and install 1/8 pipe plug. This will plug the passage to
the mains.
Put the block on its
oil pan flange. The next hole you will drill from scratch and may be a little
scary for the first timer. Just take your time and look at the pictures. I tend
to drill this hole a little on the high side so you do not get into the fitting
for the oil pump. Start with a 1/8 drill bit on a slight angle. (see angle of
tap below). Go to a 3/16 and then to a 9/16 drill. Be careful and try to keep
it lined up straight with the oil pump passage. Now, tap the hole with a 3/8
NPT tap being careful to keep the same angle that you drilled on.
The next hole that gets drilled is the hole that used to have the bypass filter and oil pressure gauge hooked to it. Take your time and just drill this one out to 9/16. Tap for 3/8 NPT also.
The
next hole is drilled about halfway between the last one you drilled and the
flywheel end of the block. Get the hole centered on the passage. Drill it with
a 21/64 drill. Then tap with a 1/8 NPT tap.
You
may choose to not drill this one if your filter has a place for a 1/8 NPT to
plumb your gauge. I have done them both ways. We use the Trans-Dapt remote filter
in our shop, but others will work. There are other ways to do this but I have
found this one to look and work the best.
Total time to do the job is about 1 hour. (It took me longer to do this article!)
Have fun and be safe!
Bruce Childs (aka Phat)
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