threaded case plugs

[cgarr]

The only threaded plug I have ever used was the small 1/8 plug in the main oil galley top. The others are too close to the other oil passages to get a good seal with a threaded plug without blocking the internal passage.

[eastbay]

The key word in finding a plug is the part description of 'flush mount'. I see Mcmaster has one that is ~1/2 depth, maybe you already have that. The plug I used was around 3/8" depth, but I found mine in my parts stash for compressed air fittings. No idea where it came from, but I used to buy big bags of assorted surplus AN hardware at the Oskosh fly in, so maybe there.

Going from memory, I think the plug needs to be flush to the case for the fan housing to fit. Mock it up to check. If it clears the fan housing and everything else there, congratulations, you're done.

If not and you can't find a shorter plug than the 1/2" length, then you need to measure the distance from case edge to oil gallery hole and trim your plug length to to that measurement. If it still does not go all the way in you will need to use your pipe tap to carefully cut the threads deeper in the case. Just be careful, not too difficult. I tapped my case holes when the brand new Porsche factory plugs did not fit my case.

Just checked the web and the torque spec for a 3/4" NPT plug is 240-300 INCH pounds. Verify for yourself.

[wprater]

Originally Posted by cgarr

The only threaded plug I have ever used was the small 1/8 plug in the main oil galley top. The others are too close to the other oil passages to get a good seal with a threaded plug without blocking the internal passage.

I measured them all when tightened to be certain the inside galleys were not blocked. Measured the plug length and the extruding portion (if any) when tightened. And compared that to the location of the inner galley hole. The inner galley hole on the flywheel side was pretty deep.

[wprater]

Originally Posted by eastbay

The key word in finding a plug is the part description of 'flush mount'. I see Mcmaster has one that is ~1/2 depth, maybe you already have that. The plug I used was around 3/8" depth, but I found mine in my parts stash for compressed air fittings. No idea where it came from, but I used to buy big bags of assorted surplus AN hardware at the Oskosh fly in, so maybe there.

Going from memory, I think the plug needs to be flush to the case for the fan housing to fit. Mock it up to check. If it clears the fan housing and everything else there, congratulations, you're done.

If not and you can't find a shorter plug than the 1/2" length, then you need to measure the distance from case edge to oil gallery hole and trim your plug length to to that measurement. If it still does not go all the way in you will need to use your pipe tap to carefully cut the threads deeper in the case. Just be careful, not too difficult. I tapped my case holes when the brand new Porsche factory plugs did not fit my case.

Just checked the web and the torque spec for a 3/4" NPT plug is 2400-3000 INCH pounds. Verify for yourself.

Thanks.

You must mean 240 - 300 INCH pounds? otherwise, that'd be gorilla tight!?

Yeah, that's the depth I have, but I was able to trim more off and while it's not flush, it seems to compare to the other shrouds that are installed on an early 2.0. I don't have my housings back from PC to check yet.

[eastbay]

Originally Posted by wprater

Thanks.

You must mean 240 - 300 INCH pounds? otherwise, that'd be gorilla tight!?

Yeah, that's the depth I have, but I was able to trim more off and while it's not flush, it seems to compare to the other shrouds that are installed on an early 2.0. I don't have my housings back from PC to check yet.

yep, sorry, one too many zeros. I did go much lower since that location is an unsupported boss.

[eastbay]

dp