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2017 VW Golf SportWagen 5MT
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Discussion Starter · #1 ·
I hate when this happens. Every once in a while I need a bolt/nut/tool and I cannot for the life of me find it in local stores. I go to Kragen, Autozone, NAPA, Midas, Home Depot, Lowe's -- I'm SOL everywhere.

People look at me like I'm a freak of nature and that what I am asking about is completely unreasonable and unheard of.

This time it's a plug for an EGT sensor in a MadDad uppipe. I believe it is 1/4" NPT? M12 1.25 bolt fits in there, but is too loose. M12 1.5 does not thread in very far. Where do I find this super rare plug? I'm ready to order online as long as it's the right part. Uppipe is stainless, so I'd prefer the plug to be same.

I even went to a local speed shop:

them: "Oh sorry, that's metric. We don't have that". (store is full of shiny V8 parts of questionable quality, most likely originated in South East Asia).
me: "This is for a STANDARD EGT SENSOR!!11!! Really?"
them: "What car is this for? Subaru? Why don't you go to a Subaru specialist"?

You are a SPEED SHOP, people. S P E E D S H O P.

Sorry, ranting. Haven't been able to install my header because of this for a while now. /end rant.

Stan
 

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2004 Subaru FXT MT
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Ace is the place...lol

You need to find what I will call a real hardware store. Not the big box stores. They are useless unless you need deck screws. Find a real hardware store. They will hook you up...

And yes, when it comes to fasteners, the autoparts stores are useless too.

And yes, most speedshops, if I can call them that, think four cylinders are for garden tractors. Unless you have an American V8, you don't exist. So you aren't going to get any metric help from them. At least that is the way it is here in IN...
 

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2004 Forester XT Premium 4EAT
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That's odd... a speed shop in the Bay Area with no metric parts?
 

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2017 VW Golf SportWagen 5MT
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Discussion Starter · #5 · (Edited)
I'm pretty sure I don't have a sensor in the uppipe.. do I? I thought just the bugeyes had that?

It's not metric, it's NPT. At least I think it is. I see posts on Subaru forums with people using M12 1.25 bolts to plug that bung, I almost guarantee their uppipes leak.

Stan
 

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I'm pretty sure I don't have a sensor in the uppipe.. do I? I thought just the bugeyes had that?

It's not metric, it's NPT. At least I think it is. I see posts on Subaru forums with people using M12 1.25 bolts to plug that bung, I almost guarantee their uppipes leak.

Stan
04/05 come stock with the catted uppipe and EGT sensor.
 

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07 FXT
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828 Posts
I hate when this happens. Every once in a while I need a bolt/nut/tool and I cannot for the life of me find it in local stores. I go to Kragen, Autozone, NAPA, Midas, Home Depot, Lowe's -- I'm SOL everywhere.



Stan

A hydraulic or pneumatic shop would have all that stuff. If you can't drive to a place easily enough then McMaster-Carr.com is an incredible place to buy almost anything. Stainless will not be common, steel or brass is more common, I would use brass, slather it with anti-seize and torque it in there "good and tight".

I work in a manufacturing shop, if it becomes an issue PM me, I can walk out there in 2 minutes and probably find 5.


Greg
 

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2017 VW Golf SportWagen 5MT
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Discussion Starter · #8 ·
04/05 come stock with the catted uppipe and EGT sensor.
Sounds like another bugeye'ism, like the non-STi oil pan.. on an otherwise identical STi engine. Go figure..

I work in a manufacturing shop, if it becomes an issue PM me, I can walk out there in 2 minutes and probably find 5.
Thank you very much, I really appreciate the gesture. I just got the word from a local Subaru shop, he says "the stock EGT is M12 1.25, and aftermarket EGT bung should be NPT 1/8"". I'll let you guys know how this works out.

Anyone can confirm that '06-'08 FXT do not have an EGT sensor in the stock catless uppipe?

Stan
 

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Sounds like another bugeye'ism, like the non-STi oil pan.. on an otherwise identical STi engine. Go figure..



Thank you very much, I really appreciate the gesture. I just got the word from a local Subaru shop, he says "the stock EGT is M12 1.25, and aftermarket EGT bung should be NPT 1/8"". I'll let you guys know how this works out.

Anyone can confirm that '06-'08 FXT do not have an EGT sensor in the stock catless uppipe?

Stan
The EGT is just there in the 04/05 to monitor the precat health (to make sure it doesn't overheat/break apart). So I would suspect its not in the 06+ as its not on the STI.

Does anyone have an actual picture of the 06+ catless uppipe? I've never actually seen one.
 

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2017 VW Golf SportWagen 5MT
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Discussion Starter · #11 ·
I tried NPT -- no go. 1/4" is too big and 1/8" is waaay small.

So, I guess it has to be M12 1.25.. that fits awfully loose for my taste :icon_confused:

Stan
 

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I tried NPT -- no go. 1/4" is too big and 1/8" is waaay small.

So, I guess it has to be M12 1.25.. that fits awfully loose for my taste :icon_confused:

Stan
I personally weld it shut. Have a weld shop down the street. Its a 3 minute job for a good welder. It doesn't get easier...

The threads on the EGT are metric to confirm. If I remember right, M12, I don't remember the pitch though...
 

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2004 Forester XT
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I just tried M12x1.25 in my after market and no go,only goes in 1 thread. Looks like I'll be walking my UP into Lowes and/or my local NAPA. :biggrin:
 

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2005 CGM FXT
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459 Posts
The bung in my MadDad up-pipe is 1/4" NPT. The plumbing section of Home Depot had copper plugs in this size.
 

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2017 VW Golf SportWagen 5MT
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Discussion Starter · #17 ·
I tried a 1/4" NPT plug -- or, at least what was given to me as a 1/4" NPT plug at K-119 Tools -- it was too big. Like I said, M12x1.25 fits pretty well, just a bit loose, 1/4" NPT would be 13.72 mm -- too big. Also, thread pitch is finer than 1/4" NPT.

Weird, eh?

Stan
 

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more than you wanted to know about pipe threads

The other "common" pipe thread is BSP, common on metric sourced items. So a 1/4 BSP taper plug (designated R1/4) would look very similar to a 1/4 NPT, but with a slightly finer thread, 19 TPI instead of 18.

If the 1/4 NPT plug started to thread and went 1/2 a turn or so and started to bind, then I'd say this is what you have. If the 1/4 NPT would not even engage, then probably not.

The above plugs are both taper threads, BSP also have a parallel thread version, which seals with an o-ring instead of interference threads. That would be a G1/4, and has a 13.5 mm OD, and 19 TPI.

If the port was a G thread, then an R fitting will still work, but G plugs will not work in an R port.
 
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