Do you torque exhaust manifold studs?

Studs do not have a torque spec. Bottom them and tighten the nut on them to the proper spec (which is given).

How tight should exhaust manifold studs be?

Every vehicle has different levels of torque necessary to properly tighten its bolts. The standard is to use 20 to 30 foot-pounds of torque. Older engines often fall on the lighter side of the equation, so use 15 to 20 foot-pounds of torque if your engine is 15 years old or older.

What grade are exhaust manifold bolts?

Common practice is to replace the exhaust manifold bolts on ’94 – ’96 cars with Grade 8 hardware. They are hardened and will carry the highest tensile load, which seems to help them withstand the heat cycles the bolts are exposed to.

Should I replace exhaust manifold bolts?

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.

How much torque does an exhaust manifold need?

The standard is to use 20 to 30 foot-pounds of torque. Older engines often fall on the lighter side of the equation, so use 15 to 20 foot-pounds of torque if your engine is 15 years old or older. Some manifolds house different sensors and plugs, such as a check valve or exhaust plug.

How tight should exhaust flange bolts be?

Tighten the bottom nut of the rear cylinder head exhaust flange to 9-18 in-lbs (1-2 Nm). Tighten the top nut to 100-120 in-lbs (11.3-13.6 Nm).

Can you over tighten exhaust manifold?

( the retourquing procedure is in the shop manual ) If you don’t do this they will loosen and then your manifold will move too much and destroy the gasket creating leaks. If you overtighten, the manifold won’t be able to move at all and it will crack!”

Can I use regular bolts for exhaust manifold?

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.

Can I use Grade 8 bolts for exhaust manifold?

Common practice is to replace the exhaust manifold bolts on ’94 – ’96 cars with Grade 8 hardware. They are hardened and will carry the highest tensile load, which seems to help them withstand the heat cycles the bolts are exposed to.

How much does it cost to replace exhaust manifold bolts?

Repair includes bolt replacement and exhaust manifold replacement. The cost of this repair typically runs between $800 – $900, parts and labor.

Do I need to torque my exhaust?

You should have a torque wrench and manual. But you can also get by without it. You can “feel” the tightness for things like rearsets, slider spools, etc which usually require 12-16 ft lbs and also more vital bolt areas like the exhaust header bolts which can be like 26.

Why do you use studs instead of bolts on an exhaust manifold?

It is quite common to see people using studs instead of bolts in the exhaust manifold and there is a reason behind it. The studs’ threads are generally softer on the inside which tends to stick it in its place and makes it difficult to get them out, whereas in bolts just a wrench can take it out easily.

Do you need to use anti seize on exhaust manifold bolts?

Although there’s no real need for applying anti-seize, it can rarely hurt as these types of repairs are often done several times throughout the life of the vehicle and with a lucky draw of the card, you might just be the one to do it again. Why did your bolt extractor break?

How much does it cost to get exhaust studs?

Make 4 interest-free payments of $19.25 fortnightly and receive your order now. Make 4 interest-free payments of $18.75 fortnightly and receive your order now.

How big is the exhaust manifold on a Prado kzj125?

It will also fit the 1KZTE 3.0 litre 4 cylinder turbo diesel engine fitted to Prado KZJ95 and KZJ120 and Hilux KZN165. This part is a 10mm diameter nut, which retains the exhaust manifold to the cylinder head. This screws onto the stud, part number 90116-10171.