Can I use bolts instead of studs on exhaust?
Super Moderator. I agree, the bolts in place of studs and nuts would be okay. Be sure to observe the torque specs for the bolts, i.e. to be the same as the nuts on the studs. You dont want an exhaust manifold to be too tight – it interferes with the manifold expanding at a different rate than the head.
Why do exhaust manifolds use studs instead of bolts?
Studs are used because: They help line up components & gaskets. Less damage to threads in casting, because stud is inserted unloaded. During removal, stud is less likely to break off inside casting.
Can I use bolts instead of studs Turbo?
DO NOT use bolts for the turbo connection; they will back out after a few heat cycles. The mechanical way the stud/nut works puts more tension on the stud to block (or turbo) side, then the nut side of the assembly allows for the thermal expansion without loosening.
Are exhaust bolts different?
What are the different grades of bolts? There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength.
Can you use regular bolts for exhaust flange?
Two years ago, I replaced some of the bolts in the left exhaust manifold with grade 5 bolts. The rear-most bolt had broken off and the easy-out method worked.
Should you replace exhaust studs?
In addition, we recommend replacing all of the bolts with OEM mounting bolts or studs. When you replace the manifold with a new one, it will be prone to the same warping that broke the bolt originally – so at the very least, be sure to replace all of the bolts with OEM mounting bolts or studs.
What are the advantages of stud over Bolt?
Studs provide the ability to obtain much more accurate torque values because the studs don’t twist during tightening as do bolts. Because the studs remain stationary during nut tightening, the studs stretch in one axis alone, providing much more even and accurate clamping forces.
Why are head studs better than bolts?
Are head studs better than head bolts?
In other words, head studs are better suited for high-performance vehicles with greater power requirements, while head bolts are more practical for personal, everyday automobiles.
What type of bolts are best for exhaust?
Best is to go stainless. 316 class stainless best pairs to the load characteristics of the exhaust man bolts, but are difficult to find. Commonly accessible, but much pricier than regular alloy steel bolts, are ARP’s and the 17-4 PH bolts offered by RMS.
Can I use stainless bolts for exhaust?
Re: Stainless bolts for exhaust manifolds I’m 99.99999% sure they use stainless bolts on jet exhausts as it won’t react with the titanium like cad plated hardware will. If it works there, it should be FINE on an air cooled engine exhaust.
Which is the best material for exhaust studs?
I agree that stainless steel would be an ideal material for the exhaust studs as corrosion is an issue with anthing on the underside of the engine. If bolts are used in this application, not matter the material, the threads in the cylinder head (aluminum) will eventually fatigue.
Are there stretch to yield fasteners for exhaust manifolds?
Exhaust manifold fasteners are not the “stretch to yield” type. In addition, most automotive fasteners are not of this type with the exception of the connecting rod and flywheel bolts on 911s and cylinder head fasteners on other cars.
Why are studs never reusable after a torque?
THe BOLTs are torque to yield so that they stretch after the first torque. Then they are never reusable any more. The studs do not stretched like bolts and do not destroy the holes like bolts do. THe BOLTs are torque to yield so that they stretch after the first torque.. . . That’s a stretch.
Which is better, cylinder head studs or bolts?
ARP®’s factory Tech Representatives are often asked which is better, cylinder head studs or bolts. The answer, invariably, depends on the installation.