Yanmar oil galley plug

[delmarrey]

I went back and researched my work from 2010. The motor actually had a street "T" already installed. So I modified it to fit. You could probably buy one from Yanmar, Part # 129670-39600. They are less then $50.

The first pic it the original yanmar fitting, in place.

The second pic is the difference between the two fittings.

I recut the end for a wrench, tapped the end for a 1/8" NPT.
The brass pipe was just a handle while working on it.

[a64pilot]

From a discussion from a Yanmar mechanic at Massey, I may have such a block on the Starboard side back by the flywheel. If so I'm told it's easy to remove and tap.
Oddly he told me you could run a 1/8" tap into the BSP threads and retap it, but I don't think I want to go that route.
Be next weekend before I get back down though.

[seabreez]

Originally Posted by a64pilot

OK, I have a 4-JHE, I want to add an oil pressure gauge, I will keep the warning buzzer.
I could I guess if I have to use a T assuming I could find one of the right thread, but I had rather if possible use another tap into the oil galley, assuming there is one and that is what I'm asking. In all honestly I don't even know where the low oil pressure switch is, I have't looked so I'm assuming I could use a T?

Is there an un-used oil galley tap on a Yanmar 4-JHE? If so , where is it? How is it removed, Allen wrench?

If you look at page 55 in your owners manual you will find the wiring diagram and see the oil pressure switch and the color of the wires. An oil pressure switch is usually close to the oil filter. The threads are usually pipe thread and available at automotive supply stores. Page 60 has your color codes legend.

[Compass790]

Originally Posted by a64pilot

Where did you find the T?

No help to you sorry as a buddy of mine who works in a pulp&paper mill supplied it to me but you can find them online. Not sure if USA has much BSP stuff but you can find them on Aliexpress

[Boatwright]

JIS (Japan Industrial Standard pipe threads are the same as British and are different from US NPT and Metric). JIS pressure senders and fittings are available from automotive, farm, and marine suppliers. Gates Corp. has a complete line of JIC engine plumbing in their extensive auto and hydraulic catalogs

Forget about tapping a new hole unless the engine is being rebuilt - metal chips from drilling/tapping into the oil system are not a good idea.

If you think you have located an existing plug in the oil galley, clean the area, remove it, engage the compression release, get a rag & crank the engine to see if it squirts oil.

[delmarrey]

Originally Posted by Boatwright

Forget about tapping a new hole unless the engine is being rebuilt - metal chips from drilling/tapping into the oil system are not a good idea.

.

Think!
Tapping should be done with the T fitting removed. Then cleaned with solvent and blown out with compressed air!

And if one were to tap an engine block, one can use heavy grease on the tap to collect the metal chips and vacuum the hole to get anything left.

As a retired Macinist we have lots of old Indian tricks up our sleeve. Non Machinists should beware!

[Boatwright]

From one machinist to another....'

I understand one can safely tap the tee. The original post inquired about drilling and tapping an oil galley in the engine block casting.

The grease on the tap trick is an old one. However the swarf from the tap drill is not so easy to trap. As to vacuuming -- maybe, but I'm also thinking that we are drilling into an OIL galley. Sticky, oily place that may be hard to vacuum, and it only takes one gritty piece of cast iron to wreck a main bearing.

I'll stick with my original opinion. JIS standard plumbing is not that hard to find.

[a64pilot]

Actually I did not ask about drilling and tapping, but removing an oil galley plug if I can find one.
But while I'm no machinist, I do know the grease trick, but that I think is more of a mechanics trick?
Anyway after that, just turn the motor over for a second to flush out any filings left with oil.
But I never intended to do that, I just got in the mail, my Yanmar to NPT adapter that I got from the Yanmar tractor dealer. I posted the link. I also got my sending unit and gauge, now to get to the boat and find that unused oil galley plug.