oil galley screw threads (pics)

[EclipticalGS]

I have this bolt that i need to get, I cant seem to figure the size. It is the bolt that is above the top left exhaust manifold stud, (circled in PIC)

I have tried 10x1, 10x1.25, 10x1.5....none will screw in by hand. I have also tried 8x1.25, and so on. Is it an oddball 9mm?? If so that sucks.

 

[Colt4G63 also]

It's NPT. (AKA) pipe thread. You need a pipe plug and some thread sealer.

 

[EclipticalGS]

ok thanks colt, but your pic didnt show up...do you know the exact size of the threads?

 

[Colt4G63 also]

The picture is there now, but I'm not sure what size. I just know it's pipe thread. It's tapered so the threads get tighter the further you screw the plug in. You should be able to get one at a hardware store.

 

[AndrewD5418]

What is that there for, i've been wondering?

 

[Colt4G63 also]

What is that there for, i've been wondering?

The plug? It's there to prevent oil from spraying out the front of the head.

The hole? It's there so they can drill the passage that sends oil to the camshafts and lifters.

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[EclipticalGS]

oh ok thanks, i have a 6-bolt block with a 7-bolt modded oil pump, i sure hope it was done right, and oil gets to my crankshaft. Thanks

 

[Colt4G63 also]

I don't think the head would have ever left the Mitsubishi factory if it wasn't drilled right, so don't worry.

Ps. The oil doesn't have to pass throught the head to get to the crankshaft, so... Refer to the above diagram.

 

[EclipticalGS]

Nooo, colt, i have a 6-bolt block, with a modified 7-bolt front case/oil pump on it, (by the crank pulley) so i hope th oil pump is modded right..just from your diagram.