C59A Oil filtration circuit question

[Lawrie]

Easy to make and fit a true full flow setup while the eng is apart.
All my engines have this .
Lawrie

[Talkwrench]

Easy for you Lawrie ..

I very much doubt there is a grub screw in that engine....

[Lawrie]

Rob,
you are right, but if you have the engine apart why wouldn't,t you do it.
How did you go with yours mates diff?
Lawrie

[Ol' Ron]

I cover this in my book, probably not as good as it could be, However all modern engines use the full flow filtering system, and it just makes sens. Especially with the cost of building these engine is so high, might as well take advantage of this system. All the engine I buld back then had this modificatio,. One person removed the filter with out removing the grub screw and destroyed the bearings in just a few minutes in just a few minutes.
Gramps

[Desoto291Hemi]

Hey Ol Ron ,
Which is your book,,,,,I’ve got several,,,,,but I didn’t want to miss out of a good source of info .
Tommy

Can it be bought online ?

[Mart]

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[Ol' Ron]

Yep Mat, thanks for posting that. Book was published back in 92. I think it helped bring the fathead back. Hope it helps.
Gramps

[Ziggster]

I'll have to order Ron's book now. Lol!

[Desoto291Hemi]

Okay good,,,,that is one that I don’t have,,,thank you .
Tommy

[jmerson]

OK, I'll bite? What exactly is a Grub Screw?? I built my first flathead in 1952 and my last one in 2007.

[V8COOPMAN]

Originally Posted by jmerson

OK, I'll bite? What exactly is a Grub Screw?? I built my first flathead in 1952 and my last one in 2007.

This gentleman's question is EXACTLY the reason I felt the need to address this subject seriously, ONE MORE TIME, especially if you've got one of the 'THREE PORT' Canadian blocks, or you're running an oil filter.

The "Grub Screw" is a plug which, in this case, CAN be threaded into (or DELETED from) the horizontal oil passage between the inboard port and the outboard vertical port on a 3-port Canadian block. The grub screw can be seen with an arrow pointing toward it in the shaded portion of this drawing. You should read portions of this thread again thoroughly, or read some of the threads in this link below for a broader explanation. Come back for more if you still have questions. Click the link below! DD


https://www.fordbarn.com/forum/searc...rchid=19797316




........

[JSeery]

Only thing I would add V8 that as far as I know the Canadian blocks were not originally threaded in the horizonal passageway and this type of screw was not used. The block would have to have been modified somewhere along the way for this to occur. And, that could well have happen, so it needs to be checked. The original factory setup used a fitting that screwed down into the vertical passageway and blocked the horizontal one. The original system had a safety relief valve to by-pass the filter if it became plugged for some reason.

[Ziggster]

I guess this raises another question (for at least myself). Since all modern oil filters have a built-in pressure relief valve, would it not be a good idea to have one installed somewhere in the circuit since I'm guessing the "original style" oil filter/housing did not have one?

To further complicate things, some screen shots I took from the "mapleleafup" forum. Lol!

[Ziggster]

Another...

[Ziggster]

Last one.

[Mart]

Of course the other option is no filter at all.

[Ziggster]

Yes, the thought has crossed my mind as I really do not want to mount the huge fugly oil filter housing on the engine. Flatheads need to be seen and not obscured by "stuff". Eventually, I'll have to figure where/how to mount mine.

[Ol' Ron]

I mount the filter down on the frame behind the steering box. Makes it easy to change with the oil.

[rotorwrench]

The external oil cooling and filtering set up was developed either in the UK or Canada for the universal carrier and for large trucks of a military nature. The engine being confined under a steel box and the vehicle not being of very high speed made it necessary to add an extra cooling capability and especially for the North African climate at the early outset of WWII.

For performance set ups, some folks tap directly into the oil pump body for oil pressure and pipe it out the side of the oil pan. The upper end of the pump body had to be plugged off so that all the pumped oil would exit the pan. This is the only way to get 100% filtration due to the fact that the rear main always got the first squirt of oil from the pump before heading on to the filter & oil galley.

The caution when setting up an external filter that runs from a block feed port and back to the block is to make certain that the plumbing is correct. If a person doesn't plug the port correctly, it can run pressure through a loop and never pressure up the galley. A few folks have found this out the hard way when their brand new overhaul was trashed.

Some folks call them grub screws and others call the set screws. The Canadian systems had a special fitting that fit down into the port far enough to block the passage that needed to be blocked but still allow proper flow. Others drill in there and tap the port for a plug or "grub screw".

[Ziggster]

Thanks for all the feedback. So much history. Although I’m middle aged, I feel like the torch is being passed down, and I hope I can do the same one day.