I installed an Off road X-pipe a couple of weeks ago and the one nut on the passenger side keeps coming loose. I tighten it up pretty good, but my friend told me not to torque it down too much because you might pull the stud thru. I was thinking of using some threadlocker, is this my best option?

 

Are you talking about clamps? If so, get a hold of a diesel exhaust clamp. You can't break one!

 

Use two nuts.

 

I am referring to the lower bolt on the stock exhaust manifold flange. It keeps coming loose, which I feel is due to vibration. It is currently leaking and making a minor rattling noise.

 

What about locking nuts???

 

oh. If you do go with thread lock, make sure to get the red, high temp kind.

 

The very last thing you want to do is use lock tight on exhaust manifold bolts.
They will break off for sure when you try to remove them. Are you sure the bolt is not too long. Sometimes they are and you need to shorten them a few threads. I use to use stainless bolts with anti-seze an all exhaust applications.

 

I was unsure about using theadlock in this application. What Bill says makes sense. It most likely is too long if you can't keep it tight. Some exhaust bolts use washer's as well.

 

Bill it is the stock bolt on the OEM manifolds. I just removed both nuts during the install and then bolted them back up. I might try a "locking" washer and some threadlocker. You can unbolt the the threadlocker I bought with hand tools it says.

 

You have me totally confused. One sentence you say bolts the other you say nuts. Which is it? I have not looked at mine so I do not have a clue which we have. It is your car so do what you like about the thread lock. A word to the wise should be sufficient.

 

It really makes sense not to use thread lock. I believe they are bolt or studs. You should be able to tighten it up. If you can't, I would tend to think they are too long.

 

Sorry I might not be coherent in my description. The nut is coming loose off of the stock bolt/stud on the header flange, which is causing a leak. I talked to a friend of mine whom builds race cars and he stated that a locking nut and threadlocker should do it. The threadlocker I bought isn't permanent.

 

I don't think Loctite will work on exhaust bolts. Loctite is only good to 300 F so it wil become liquid again defeating the threadlocking ability. You should try a stove (crimped) nut.

 

Used blue Loctite on Harleys for years and works fine. Wouldnt worry with using it in your application either.

 

I thought those nuts were fixed on the bolt? There is some red threadlocker that is heat resistant. You'll get it on there tight before long!