F134 Timing Gear Oiling

I'm rebuliding an F134 for my '63 CJ5 and have a question many of you guys may know the answer to. My engine had a brass plug with a screwdriver slot in it installed in the place where the oil spray nozzle is supposed to be. There is no hole in it. Is this normal? Was there a version with no oil jet? What was the size of the nozzle and can I purchase one or do I have to make it. I've posted this question on one other forum and received some very good feedback but I need to be sure. Thanks for any help you can offer.

Edk

 

wow
never seen an F4 without one
don't see how you could leave that out for whatever the reason
no oil to cam gear = major problem
they will imitate a rod knock sometimes when failing
the crank gear has it's own oil slinger, but the oil jet needs to be there
FSM makes no mention of hole size, but I know it's small
donor block may be the only source for this

 

been doing some more thought on this subject overnight
I seem to recall reading somewhere that the oil jet was brought into production due to lubrication shortcomings of the crank oil slinger. The jet opening was a certain size and the nozzle had to be directed onto the cam gear in a certain position. The passsage the jet threads into has always been there.
The FSM and parts manual make no mention of this and show the oil jet for all F4s; somewhere I have read this though.
more searching will be needed....

 

Glenn you are correct

I gotta do so more research.......

 

the orifice was .070 and was modified to .040 via the service bulletin

 

Kamel to the rescue
thanks

 

Oooohhh, good info! My motor is a '56, is that early enough that this is something I should be checking out?

 

Well, yeah, it's going to be totally rebuilt back to stock specs, I want that motor to be completely new and reliable so that it never needs to be opened up again. I don't want any breakdowns at 10,000 feet up in the mountains. I'll be checking that little nozzle out real close.

 

Guys: Thanks for all the input and help. I have a friend in Ontario that has rebuilt military jeeps for 40 years. He actually found the first one for me at age 14, 38 years ago. Of course, I've been hooked ever since. I talked to him last night and he has seen F134's with a slotted brass plug and no nozzle. He believes that with the filter return line in the timing cover that the timing gears are probably receiving enough lubrication and that the Number 1 rod and main are probably more important in pressure and flow of oil. He was wondering if jeeps built in Canada like mine got the plug due to cold weather operation. Any way like one of the replies indicated Northstar Willys (super nice guys) has some used ones and so does a member who has kindly offered to sell me one that he has if it's OK. I have to thank you all again. Why are jeep guys so nice, anybody know?

 

'Cause our mamas raised us that way!

 

I hate to bring an old thread back up, but I have this brass plug with the screwdriver notch. Being the amateur that I am and while I have it apart should I replace this while I ahve it apart and what part do I need?

 

To add to this thread,...

I had one of the earlier nozzles with the bigger hole, I went and picked up a .040" drill bit at the hardware store, and drilled throught the old hole into the otherside of the nozzle with a drill press so that the new .040" hole was directly opposite of the old hole and in the proper position. Then I simply sealed the old, larger orfice shut with a well placed tack weld. Worked like a charm, and it'll keep you from hunting down a new part!

Hope this helps someone,
Daniel

 

Duh

Upon inspection with a mirror I do have a hole drilled on the side. Dunno if it is the small or large but it has seemed to worked so I am gonna leave well enough alone.

 

I have an L head engine and it has the oiler for the timing gear. Not an early engine with timing chain. Any thoughts about this? Was it eliminated with the early F heads? Or did someone add it to this engine?

 

According to the FSM for section D L-Head and also in section E for the F-Head

PARA D-84 "Install the timing gear oil jet in the tapped hole in the front of the cylinder block. Position the oil hole in the side of the oil jet so that it will direct the oil stream against the cam shaft gear just ahead of the point of engagement with the crankshaft gear."

"Note: A new timing gear oil jet entered production with engine serial number 3J-166871. The earlier jet has a .070 diameter aperature; the later jet has a .040 aperature. The later jet reduces oil pressure variation at No.1 connecting rod bearing. it is recommended that the .040" jet be installed in engines with serial numbers lower than oabove whenever it has been necessary to replace a scored bearing or burned No.1 connecting rod bearing."


So yes it should be there.