Tiger 134 CID rebuild

Two0aks

Member
Engine was machined, new liners, pistons,rods, the works. Head seats valves springs the works. I assembled all carefully with advice.

Problem is that I have one spare pipe plug. I believe it is a 3/8 plug and has internal 5/16 hex. Before I installed the flywheel & clutch I removed the oil pan and carefully looked inside to see if there was a hole this plug would go in. Didn't see anything. I don't think there is a plug in the head, but I haven't taken that back off and don't want to spring for another head gasket.

Looking through many archives I ran across someone stating after rebuild they had no oil pressure. Two or three responses mentioned to check the Oil galley. I don't know where exactly that might be referring to ? There are several small soft plugs on the RH side of the block, but other than that I don't know where this plug might have been. It's not the Diff drain and level check plug nor the Hyd Resv drain either. Those are bigger.

I just can't figure why I have this plug and it has oil residue in the Hex end. It was with a bunch of loose parts along with the rocker assembly while I was waiting for the engine machining. Has anyone overhauled this engine and know if there is a pipe plug anywhere ??
 

The "oil gallery" is a drilled passage the block from front to back that carries oil from the pump and filter to the cam and main bearings.

Typically there's a plug in the back of the block that if missing would dump oil into the flywheel housing and one in the timing gear area that if missing would cause an internal leak and loss of oil pressure.

I can't quickly find an illustration of your engine, but here's one of a 6-cylinder engine showing the typical location of an oil gallery plug in the timing gear area.

Yours likely is supposed to have a plug in a similar location.





XKb50v1.jpg
 



I looked at the short block diagram in the Messick's parts pages and I could find only the ones on the right side, along with all of the "cup plugs". As wore out posted even though they are frequently called "galley plugs" they are really "gallery plugs" and the ones now in use are usually stainless steel 3/8 hex head. Go ahead and look at the On-line parts pages.
 
(quoted from post at 13:41:37 03/11/22)

You say you assembled. Did you disassemble? If you did, did you remove all oil galley plugs? If not, the automotive machine shop would have / should have for proper cleaning. Usually, not always though, they will install new plugs, leaving the old plugs behind.

One slick trick was told to me by Harold and Landis Zimmerman when I was working on a Hercules engine with no oil pressure. Engine had run this way for lord knows how long. The client had been oblivious to the problem. Harold instructed me to remove the front timing cover, then an oil galley plug in the front of the engine. Using a straight piece of gas welding rod, I inserted it into the oil galley all the way to the rear as far as it would go, and carefully marked the location of the front of the engine on the rod. Using this rod, laid along the outside of the engine, it was easy to see that the rear oil galley plug was missing, as the rod butted right up to an adapter plate on the rear. If there was an oil galley plug there, the rod would have stopped short of the plate. Apparently this plug had been left out on the last rebuild. Per the client, just installed a plug and buttoned it all up. Still running to this day. Was about 15 years ago.

Other places a plug could be missing from are around an oil filter boss, some were drilled here for pressure gauges then not used. Also the side of the block along the galley for specs that called for an oil sender switch.
 
Thank you wore out, showcrop, and jimtrs for the replies. I had Disassemble this engine and had this plug and some miscellaneous parts on a table along with the Rocker assembly for three years. Only delivered the block, head, cam & crank for renewal.
Still trying to get ahold of the machine shop that worked on this Nov. 2021. Hate to pull the timing cover, but may have to. Will look at Messicks to see what they show.

Bill
 

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