What size are exhaust bolts?
The usual options of exhaust flanges are the 3 bolt or 2 bolt types. Usually, m10 with the 2 bolt option is helpful, and an m8 bolt for the 3 bolt. The recommended grade of bolts is 8.8 tensile or higher so that you can tighten them without stretching or breaking the bolts.
Are studs better than bolts for exhaust manifold?
For a performance or heavy-duty application, the use of studs is preferred whenever possible instead of main cap bolts, in those instances where a choice is available. Studs provide the ability to obtain much more accurate torque values because the studs don’t twist during tightening as do bolts.
Can you reuse exhaust manifold studs?
You could reuse them, if you think they look good, but your chances of one breaking later have gone up now. I replace them every time, just heat the area around the studs, and melt a candle or crayon into the threads, let cool, they should come out easy, may need to heat again.
How many studs does an exhaust manifold need?
Removing the Manifold In our case, the Hemi exhaust manifolds use four studs and five bolts. The studs hold the heat shield in place.
What is an M10 bolt?
M10-1.0 x 20 M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener’s length, in millimeters.
Can you use bolts for exhaust manifold?
Just consider the application. If you are reusing exhaust manifold bolts (which we don’t recommend), apply a metal fortified anti-seize to your manifold bolts. If you’ve just removed the broken bolts and ready to complete the repair, chase the threads clean and use fresh OEM bolts for best results.
How much does it cost to replace exhaust manifold bolts?
Usually, this type of repair will run between two and three hours. Most independent shops charge around $80 to $90 an hour, so it should cost between $160 and $270 in labor. At a dealership, with a labor rate of approximately $110 an hour, you can expect a labor bill of between $220 and $330.
Can you reuse header bolts?
The stock header bolts can be reused many times. As long as the threads look good and your not wanting to spend the coin on new ones go for it.
Should you Loctite exhaust manifold bolts?
Loctite is not recommended for exhaust manifold bolts because it may lose its effectiveness when heated, and will make it too difficult to remove the bolts in the future. You should apply Anti-seize to manifold bolts in order to prevent them from seizing, and from corrosion.
Should I put anti-seize on exhaust manifold studs?
If you are reusing exhaust manifold bolts (which we don’t recommend), apply a metal fortified anti-seize to your manifold bolts. If you’ve just removed the broken bolts and ready to complete the repair, chase the threads clean and use fresh OEM bolts for best results.