Important!
Chase the thread out with a tap.
That is the only way to assure things will go well.
I snapped off a stud near the end where the nut was.

Then drenched it in WD40.

Used a snapon stud remover that a friend loaned me.
Worked like a champ.
But, I had to tighten, loosen, tighten to get out that stud.

Then chased the thread with a tap which I bought.

Then the stud went in - with the copper colored anti seize.
Best thing is to never touch this stuff if you can avoid it.

 

That's an excellent idea. I'm calling my junk yard to see if I can find a cheap/acceptable replacement.


In the mean time, I'm trying collect and record as much OBD perf, temp, voltage, fuel, etc etc as I can. If I'm lucky, I'll get enough quality and usable data for a decent before and after comparison.

Cheers,

Thomas

 

Good point I hadn't thought of....

Do you remember what size tap to use? (or anyone know?)

Cheers,

Thomas

 

M8 x 1.25

 

Another note since we're talking about exhaust pipes... I lost my resonator awhile back. My manifold and Y pipe along with the muffler is sealed and fine now... no CEL but the resonator is gone. Will this effect anything besides noise?

 

I dont believe it will affect anything other than not be so quiet anymore. That resonator is a basically. A silencer for the exhaust system.

 

I'm not sure I'd know/recognize a resonator if I was looking straight at one.

Which part is / what does it look like / where is the resonator?

Is it before or after the cat? (I'm guessing it's aft)

Tom Rowe: Thx for the tap/thread size..

Cheers,


Thomas

 

I just checked google, amazon, and ebay for "m8 x 1.5 taps", "m8 x 1.5 thread", and "m8 x 1.5 chase" and couldn't find anything related to "m8 x 1.5".

I've found a lot of m8x1.25 and m8x1 but not a single m8x1.5.

I've used taps and dies a few times but I'm not very familiar with the different types etc.

What type (tapered, plug, ?) and size (m8x1.25 or m8x1.5?) of tap do I need to chase the threads in the exhaust manifold stud holes?

Where can I get it?

Correct me if I've got this wrong but..."Chasing threads" is basically using a tap with the same thread size as the original threads to clean up threads that might be a little worn or dirty but havn't been stripped? Right?
"Chasing" a thread isn't the same as "repairing" it right?

Thanks much,

Thomas

 

I just went out to the shop and checked the threads on the stud (I have a bag of them from my days at the dealer) they are M8 x 1.25, there are chasing taps that don't cut metal, regular taps have sharper edges. Chasing taps are normally used to clean out threads (either rust or dirt). I use chase threads whenever possible, regular taps can cut more metal out reducing strength.

 

Yeah, M8 x 1.25. Sorry, dropped the '2' when I was typing.
I've edited my post to correct.