by "way2blu does a rev update" (way2blu)
Published 06/27/2017 at 15:25
by "way2blu does a rev update" (way2blu)
Published 06/27/2017 at 15:25
Tags: Miata
; exhaust
; rebuild
STARS: 0
A friend of mine has a ‘95 NA Miata. It simply needs the exhaust system re-attached and it’ll be roadworthy again. We’re calling on Oppo for some advice on how to go about it.
As of right now, the manifold and related parts aren’t connected, but we want to replace one of the damaged studs for the exhaust manifold gasket:
What’s the best way to remove one of these? Here’s a picture of the engine bay for reference:
Any and all advice is appreciated, I’ll be documenting the build across the course of this week. We’re taking it slowly so far to make sure it’s done right. I can take more pictures if needed, too.
"Frank Grimes" (FrankGrimes)
06/27/2017 at 15:32, STARS: 3
thread two nuts on the stud and tighten them together and then turn the one closer to the head to remove the stud. failing that vise grips and twist it out. why are you removing the stud it seems ok at least from a photo across the internet.
"Rust and Dust - Oppositelock Forever" (rustanddust)
06/27/2017 at 15:33, STARS: 1
Two nuts and a wrench.
The stud should thread into the head. Jamb two nuts against eachother (essentially making it a bolt with a fixed hex you can grip), then use a wrench to back the stud out.
"My X-type is too a real Jaguar" (TomSlick)
06/27/2017 at 15:33, STARS: 0
Chrome exhaust stack through the hood
"Wrong Wheel Drive (41%)" (rduncan5678)
06/27/2017 at 15:33, STARS: 1
Is the stud actually trashed or could it possibly just be cleaned up? I recently replaced the full exhaust on my ‘01 Miata. Thankfully I had no issues with the studs and separating and installing the header to engine connection was the easiest part of the whole ordeal. Dealing with that damn water inlet to the water pump was a major pain though.
Anyways, installing any cool aftermarket exhaust parts?
"notsomethingstructural" (notsomethingstructural)
06/27/2017 at 15:41, STARS: 1
as others have said, double-nut it.
as others have not said, be ready with lots of penetrating lube and a torch.
"fennelbreath" (fennelbreath)
06/27/2017 at 15:43, STARS: 0
Give me the address. I’ll come by with a flatbed and take care of it.
"way2blu does a rev update" (way2blu)
06/27/2017 at 15:47, STARS: 0
Here’s the stud from a different angle:
I tried fitting the nut on the stud and it doesn’t screw on. The threading on the stud is pretty badly damaged on one side.
First step is to get the system re-installed so the car can be smogged, then replacing fluids and wear items in advance of autocross next month.
"way2blu does a rev update" (way2blu)
06/27/2017 at 15:49, STARS: 0
The threads look pretty bad on the other side:
Can’t get the nut to fit on it, will try the vise grip soon.
"diplodicus" (diplodicus)
06/27/2017 at 15:50, STARS: 4
try running a die over it to see if you can clean it up and get the nuts on before resorting to vice grips/torch.
"way2blu does a rev update" (way2blu)
06/27/2017 at 15:51, STARS: 0
Hehe that’d be cool...
"cmill189 - sans Volvo" (cmill189)
06/27/2017 at 15:52, STARS: 2
This. Definitely let is soak for a while.
Also, it really doesn’t look that bad from the pics. I’d try chasing it first and throw some washers on and see if it will hold torque.
"notsomethingstructural" (notsomethingstructural)
06/27/2017 at 15:56, STARS: 2
the vise grip is really a last resort kind of thing, you’re better off trying to grind off the burred thread or cut it below that point, or hit it with a die, or anything really. once you hit it with the vice grips if that doesn’t work next step is drilling it, have fun with that on hardened and tempered steel
"way2blu does a rev update" (way2blu)
06/27/2017 at 15:56, STARS: 1
Will see if I can find one. Definitely would rather use the nuts than the other methods.
"way2blu does a rev update" (way2blu)
06/27/2017 at 15:58, STARS: 1
Yup that’s a good point. I’ll be seeing if I can find a way to get the 2 nuts on it and remove it that way.
"Decay buys too many beaters" (decay)
06/27/2017 at 15:59, STARS: 0
I’ll echo everyone else here, just chase it with a die and see if it cleans up. Looks ok to me.
"Wrong Wheel Drive (41%)" (rduncan5678)
06/27/2017 at 16:01, STARS: 0
Oh yeah that thread looks quite buggered up from this angle! Hitting it with a thread chaser may be enough to get nuts on so that you can properly remove the stud. The stud replacement shouldnt be that difficult based on what I am reading.
And autox sounds like a good plan. Guessing just trying it out stock would be a better start than jumping off the mod cliff.
"Frank Grimes" (FrankGrimes)
06/27/2017 at 16:28, STARS: 0
try using some pb blaster or other penetrating lube. be careful as the head being aluminum is going to be very easy to mess up. or weld a nut on the end of the stud.