Stripped Bung - Page 4 - Subaru Enthusiasts Car Club of the Sierras

Kevin M · 2009-06-03, 11:07 AM

Quote:

Originally Posted by sperry

This may officially be the longest thread on the internet about your bung hole, Cody.

....wait, nevermind, there's that other thread on that other site I almost forgot about.

For god's sake, plug that damn hole already and see if it works... more talking about it isn't going to get you any closer to being leak free!

I can't believe it took 69 posts before someone made this joke.

cody · 2009-06-04, 08:05 AM

I know you guys want to talk about my bung more.

I've decided that whoever suggested that I just go to the next size plug was right. (Dean?)

I've got a 1/4-19 Pipe tap and a 1/4-18 Pipe tap. I just hope that the material that the plug is made of can withstand the temps. The plug I saw at true value for the existing hole size appeared to be solid, so that's good at least. Any plug that's not copper should withstand the temps right?

PS: Dean, good idea. Rebooting the BBQ fixed it. I think I need to be sure to open the valve on the tank before opening the valve on the BBQ to avoid it in the future.

AtomicLabMonkey · 2009-06-04, 08:27 AM

A steel or iron plug will be fine in a tapered pipe thread joint.

A straight threaded hole using a regular bolt needs a sealing washer between the part's outer surface and the bolt head. If that washer softens up because of the temperatures involved, then the joint loses preload and will eventually leak and loosen up. All this depends on the specific temperatures involved. Copper crush washers are used routinely on cast iron brake calipers that obviously can get very hot during operation, but a hot caliper is probably still quite a bit cooler than an exhaust manifold. So, I dunno. Might work, might not. Hard to be more specific over the internet.

cody · 2009-06-04, 08:35 AM

Yah, that's the issue. The "casting button" (raised bump on the manifold that is thicker than the rest of the pipe) where I tapped the original hole years ago is not wide enough to provide a flat seating surface around the larger hole I had planned to tap for the straight bolt. So by the time I tapped the larger hole, the casting button would be almost gone and I'd probably have to grind it off completely to create a flatish surface for the washer[s] to seal.

Obviously the tapered pipe thread is an effective way to seal or EGT probes wouldn't have been designed to utilize one. I figure I just need to secure a plug that won't melt, and I'm in business.

Thanks ALM I'll call True Value to see if they have a plug made of iron or steel on my break since they're on my way home from work and open in the evening. I'd rather not take another long lunch to go to R&E.

Dean · 2009-06-04, 09:16 AM

All Pipe plugs you will get at any "hardware" store will be steel and be fine at those temps. Brass would also work as that is what the EGT compression fitting is made of.

Yes, that is why they use pipe thread. the thread itself is the seal due to the taper.

AtomicLabMonkey · 2009-06-04, 09:18 AM

Quote:

Originally Posted by cody

Yah, that's the issue. The "casting button" (raised bump on the manifold that is thicker than the rest of the pipe) where I tapped the original hole years ago is not wide enough to provide a flat seating surface around the larger hole I had planned to tap for the straight bolt. So by the time I tapped the larger hole, the casting button would be almost gone and I'd probably have to grind it off completely to create a flatish surface for the washer[s] to seal.

Ahh. Yeah, a crush washer will not work. They are used in conjunction with a smooth, flat surface perpendicular to the hole's axis. You would not be able to create one smooth enough with a grinder, they are normally milled out.

cody · 2009-06-04, 09:48 AM

That's what I figured, plus I wouldn't want to grind away at the pipe.

So True Value has a 1/4 NPT plug for 79 cents (

) and all the guy could tell me is that it's "black pipe". He was actually a real asshole over the phone to me. I asked him what the thread pitch on it was and he said, "I dunno. I don't know what thead you're using." I said, "Well, it's NPT right?" and he said it was so as long as "black pipe" metal is okay, I'll grab it on the way home and FINALLY plug my bung!

Dean · 2009-06-04, 10:02 AM

Black pipe is fine. It is probably damn close to the steel the header is cast from.

Pick up one for your current size as well for $.79. You never know, the taper on it might go further out than your egt. Depending on the head on it, you might drill a cross hole in it and put a piece of safety/baling wire through and around the header for a while.

Don't over tighten a tapered thread. It it has enough bite, it might split that button in half.

cody · 2009-06-04, 10:07 AM

Hmmm, redneck safety wire, I like it.

I certainly won't be overtightening it. That's what got me in this mess in the first place.

ScottyS · 2009-06-04, 10:50 AM

Quote:

Originally Posted by cody

So True Value.....was actually a real asshole over the phone to me.......he said, "I dunno. I don't know what thead you're using.".......he said it was so as long as "black pipe" metal is okay......

That's when you say "eeeeeehhhhhhehehehehehehehhheeeeehhhhhhheheheh... ..I need NPT for my bungholio!"

cody · 2009-06-04, 10:53 AM

sperry · 2009-06-04, 12:39 PM

Quote:

Originally Posted by ScottyS

That's when you say "eeeeeehhhhhhehehehehehehehhheeeeehhhhhhheheheh... ..I need NPT for my bungholio!"

HEY! You just got 1995 all over my 2009!

Kevin M · 2009-06-04, 01:28 PM

cody · 2009-06-04, 02:12 PM

Think a brass plug would be okay (lower melting point but less thermal expansion) or should I drive further for a black pipe plug? Afterwork plans changed so now brass at home depot is closer.

Dean · 2009-06-04, 02:17 PM

OMG, you lazy SOB...

Brass might be a better choice if you plan to put the EGT back, steel if not. The former will not rust, the later will.

cody · 2009-06-04, 02:21 PM

LOL, brass will save me 12 miles and 20 minutes of driving.

cody · 2009-06-04, 02:37 PM

Ace, 5 minutes from here, has galvanized and brass. They're like twice as expensive as True Value though! :o

Is galvanized okay better than brass?

ScottyS · 2009-06-04, 02:40 PM

Dude, your bung hole is high maintenance.

cody · 2009-06-04, 02:41 PM

My mom used to go to a bar called The Brass Ass when I was a kid.

Dean · 2009-06-04, 02:45 PM

Galv = steel, just like the black only coated differently.

Which one is on your way to the meet?

cody · 2009-06-04, 02:57 PM

Ace is, but unfortunately I have to get my hairs cut and then get home and plug my bung and pack my travel bag.

sperry · 2009-06-04, 03:09 PM

I'm going to friggen close this thread and make Cody PM me when he finally has his bung plugged and then I'll re-open it so he can write 40 posts on how he finally figured out how to put a screw in a hole.

cody · 2009-06-04, 03:10 PM

Righty-tighty right?

van · 2009-06-04, 04:23 PM

Jesus, I'm looking forward to Cody's nine page oil change thread

cody · 2009-06-04, 04:24 PM

You mean the one where I removed the Fumoto oil valve and cut a groove into it and then measured how much oil it still held back? We talked about Royal Purple and all sorts of stuff. Good find.

2009-06-04, 08:05 AM	#77
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	I know you guys want to talk about my bung more. I've decided that whoever suggested that I just go to the next size plug was right. (Dean?) I've got a 1/4-19 Pipe tap and a 1/4-18 Pipe tap. I just hope that the material that the plug is made of can withstand the temps. The plug I saw at true value for the existing hole size appeared to be solid, so that's good at least. Any plug that's not copper should withstand the temps right? PS: Dean, good idea. Rebooting the BBQ fixed it. I think I need to be sure to open the valve on the tank before opening the valve on the BBQ to avoid it in the future. __________________ Slow and low, that is the tempo.

2009-06-04, 08:27 AM	#78
AtomicLabMonkey Nightwalker Real Name: Austin Join Date: Dec 2002 Location: Oshkosh, WI Posts: 4,063 Car: '13 WRX YGBSM	A steel or iron plug will be fine in a tapered pipe thread joint. A straight threaded hole using a regular bolt needs a sealing washer between the part's outer surface and the bolt head. If that washer softens up because of the temperatures involved, then the joint loses preload and will eventually leak and loosen up. All this depends on the specific temperatures involved. Copper crush washers are used routinely on cast iron brake calipers that obviously can get very hot during operation, but a hot caliper is probably still quite a bit cooler than an exhaust manifold. So, I dunno. Might work, might not. Hard to be more specific over the internet. __________________ "None of you seem to understand. I'm not locked in here with you.. you're locked in here with me."

2009-06-04, 08:35 AM	#79
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Yah, that's the issue. The "casting button" (raised bump on the manifold that is thicker than the rest of the pipe) where I tapped the original hole years ago is not wide enough to provide a flat seating surface around the larger hole I had planned to tap for the straight bolt. So by the time I tapped the larger hole, the casting button would be almost gone and I'd probably have to grind it off completely to create a flatish surface for the washer[s] to seal. Obviously the tapered pipe thread is an effective way to seal or EGT probes wouldn't have been designed to utilize one. I figure I just need to secure a plug that won't melt, and I'm in business. Thanks ALM I'll call True Value to see if they have a plug made of iron or steel on my break since they're on my way home from work and open in the evening. I'd rather not take another long lunch to go to R&E. __________________ Slow and low, that is the tempo.

2009-06-04, 09:16 AM	#80
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	All Pipe plugs you will get at any "hardware" store will be steel and be fine at those temps. Brass would also work as that is what the EGT compression fitting is made of. Yes, that is why they use pipe thread. the thread itself is the seal due to the taper. __________________ I am a Commodore PET --- Now get off my lawn you kids...

2009-06-04, 09:48 AM	#82
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	That's what I figured, plus I wouldn't want to grind away at the pipe. So True Value has a 1/4 NPT plug for 79 cents () and all the guy could tell me is that it's "black pipe". He was actually a real asshole over the phone to me. I asked him what the thread pitch on it was and he said, "I dunno. I don't know what thead you're using." I said, "Well, it's NPT right?" and he said it was so as long as "black pipe" metal is okay, I'll grab it on the way home and FINALLY plug my bung! __________________ Slow and low, that is the tempo. Last edited by cody; 2009-06-04 at 09:51 AM.

2009-06-04, 10:02 AM	#83
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	Black pipe is fine. It is probably damn close to the steel the header is cast from. Pick up one for your current size as well for $.79. You never know, the taper on it might go further out than your egt. Depending on the head on it, you might drill a cross hole in it and put a piece of safety/baling wire through and around the header for a while. Don't over tighten a tapered thread. It it has enough bite, it might split that button in half. __________________ I am a Commodore PET --- Now get off my lawn you kids...

2009-06-04, 10:07 AM	#84
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Hmmm, redneck safety wire, I like it. I certainly won't be overtightening it. That's what got me in this mess in the first place. __________________ Slow and low, that is the tempo.

2009-06-04, 10:53 AM	#86
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	__________________ Slow and low, that is the tempo.

2009-06-04, 01:28 PM	#88
Kevin M EJ22T Join Date: Sep 2003 Location: Reno Posts: 9,445 Car: '93/'01 GF6, mostly red Class: 19 FP	__________________ FWD is the new AWD

2009-06-04, 02:12 PM	#89
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Think a brass plug would be okay (lower melting point but less thermal expansion) or should I drive further for a black pipe plug? Afterwork plans changed so now brass at home depot is closer. __________________ Slow and low, that is the tempo.

2009-06-04, 02:17 PM	#90
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	OMG, you lazy SOB... Brass might be a better choice if you plan to put the EGT back, steel if not. The former will not rust, the later will. __________________ I am a Commodore PET --- Now get off my lawn you kids...

2009-06-04, 02:21 PM	#91
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	LOL, brass will save me 12 miles and 20 minutes of driving. __________________ Slow and low, that is the tempo.

2009-06-04, 02:37 PM	#92
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Ace, 5 minutes from here, has galvanized and brass. They're like twice as expensive as True Value though! :o Is galvanized okay better than brass? __________________ Slow and low, that is the tempo.

2009-06-04, 02:40 PM	#93
ScottyS EJ205 Real Name: It is real! Join Date: Jul 2004 Location: RNO Posts: 2,367 Car: 1998 Impreza Wagon, 1991 Legacy Turbo Sedan, 2003 Nissan Xterra Class: tvFree Yes, I'll fix it for you. Again.	Dude, your bung hole is high maintenance. __________________ "Trend Number One is that people aren't getting any smarter." Dogbert

2009-06-04, 02:41 PM	#94
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	My mom used to go to a bar called The Brass Ass when I was a kid. __________________ Slow and low, that is the tempo.

2009-06-04, 02:45 PM	#95
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	Galv = steel, just like the black only coated differently. Which one is on your way to the meet? __________________ I am a Commodore PET --- Now get off my lawn you kids...

2009-06-04, 02:57 PM	#96
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Ace is, but unfortunately I have to get my hairs cut and then get home and plug my bung and pack my travel bag. __________________ Slow and low, that is the tempo.

2009-06-04, 03:09 PM	#97
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	I'm going to friggen close this thread and make Cody PM me when he finally has his bung plugged and then I'll re-open it so he can write 40 posts on how he finally figured out how to put a screw in a hole. __________________ Is you is, or is you ain't, my con-stit-u-ints?

2009-06-04, 03:10 PM	#98
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Righty-tighty right? __________________ Slow and low, that is the tempo.

2009-06-04, 04:23 PM	#99
van SECCS Brewmeister Join Date: Oct 2005 Location: on the edge of a marsh Posts: 1,451	Jesus, I'm looking forward to Cody's nine page oil change thread

2009-06-04, 04:24 PM	#100
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	You mean the one where I removed the Fumoto oil valve and cut a groove into it and then measured how much oil it still held back? We talked about Royal Purple and all sorts of stuff. Good find. __________________ Slow and low, that is the tempo.