Did a compression test on my stroked Olds 215, not good. #4 cylinder at 50 lbs.

[mgb260]

Metric cover image:

[mgb260]

Curtis on this site, has the Metric cover tapped opposite side of oil filter. Image is about 3/4 the way down on his page:

https://www.britishv8.org/MG/CurtisJacobson.htm

[Gswest236]

Thanks guys! I saved the photo Jim and will look at it when I start the drill and tap process.  I say I don't want to use the swivel filter adaptor and I got the smaller filters, but in the back of my mind I fear that the engine's position may be slightly more forward than Jons and thats why the builder had to use the adaptor. To use the adaptor it looks like there's machining to the filter  housing that has to happen. If I drill and tap for the oil line and find out later that I have to use the swivel adaptor, I guess I can plug the hole.

[mgb260]

Put thick grease on the bit and tap and go slow. Looking at Wayne's page, your motor is all the way back like Jon's. You will have to dent the frame member where you untread the filter for clearance. You can see that in another of Curtis's images. A lot of guys used the swivel adapter before they knew the Metric cover and short filter would fit.

[mgb260]

Looks like Curtis tapped into this flat spot on the right:

[Gswest236]

Looking at the oil line photo from Curtis' build; that spot on the back of the filter housing can be drilled and tapped without worrying about the shavings because with the filter off I'll have access to both sides of the hole. Great Pic and looking at Curtis' build, Holly Crap! He's obviously a machinist and did a fantastic job. His Fuel injection is awesome!

[mgb260]

Curtis is a great asset of this community!

[Gswest236]

So I have what I think is the right tap. I'm new to drilling and tapping so the size is throwing me. It says  1/8 NPT on the female part of this tap. It measures 3/8 and the tap goes in nicely to the filter relocation housing. So, looking online it says I need a Q size drill bit. Looking further it say's a 11/32 bit is close. Should I get a special Q size bit to drill this out?

[mgb260]

Pipe thread sizes are weird. What is the small diameter of the tapered thread of your fitting? I'd use a bit a hair smaller than that. That 90 may be too long to turn. You may want to get a more compact 90 or 45 instead. Or a straight fitting with a bend or slack in your line.

[Gswest236]

It measures 3/8 at near the tip inside the threads. I'll look for some fitting options at the hardware store tomorrow. First time seeing letters for drill bit sizes; it says Q size for 1/8 NPT? But it also said 11/32 was a close size in inches.

[mgb260]

11/32" sound right.

[Gswest236]

Third time was a charm. This one seems to fit, the tooth is a little tight, but engages. I'll file down the paint off the tooth and it should be fine.

[BlownMGB-V8]

Come to think of it, the plug in the 215 (straight) cover is probably used on the filter bypass plug since that sees full pressure and the plug for the pressure relief would be on the ambient or spring side of the piston, and would not read oil pressure. So you wouldn't be able to read oil pressure from that point, which would explain why they changed the pick up point when they went to the angled cover. That point where Curtis tapped in sounds like about the best candidate.

If you look at a drill chart IIRC I think the tap size is an "R" drill. Since it's cast aluminum you can go 1/64 undersized with no problems.

Jim

[Gswest236]

So, 11/32" will be closest regular size? I might even have one.

[Gswest236]

I started to drill a pilot hole and as I'm looking at it from the back I now understand why Jim N. was saying I'd need a straight or 45 fitting instead of the 90 I have. There's no space to spin the 90 into place the way the back is shaped. Need a new fitting!

[mgb260]

Scott, Looks like Curtis used a straight fitting.

[Gswest236]

Ordered the straight fitting for monday. Thanks

[Gswest236]

Of course, the Depot had every fitting except this one. I hate making Bezos richer

[Gswest236]

I'm waiting on the straight fitting before I go any further with the tap. I'm assuming I'll need to go all the way or nearly all the way in order for the fitting to go in flush with the back section.

[mgb260]

Scott, it won't hurt if it sticks out inside a little, it won't hit anything. Use Teflon tape on the threads to prevent leaks.

[Gswest236]

Got it, teflon tape. I measured the space in there, so it can go all the way in and not touch anything. The tap is working well.

[mgb260]

I'd just go the depth of the threads on your old fitting.

[BlownMGB-V8]

For tapered pipe taps you should go in 2/3 to 3/4 of the thread length, at which point you should have about 2 threads that the fitting screws in by hand before it starts to get tight. The seal is in the threads so it needs to be able to get fully tight before you run out of threads.

Jim

[Gswest236]

OK, That's why I stopped until I get the right fitting. Don't want to go too far in with the tap, but far enough to seal. Thanks

[Gswest236]

The Intake came back from Jethot.