Where are the failures mostly located in the exhaust manifolds?
The locations where failures occur, on both the exhaust manifolds (cast or fabricated) and exhaust manifold gaskets, are predicted with high degree of accuracy.
Can a stud be removed from an exhaust manifold?
After years of extreme engine temperatures, removing exhaust manifold studs can be a near impossible task. Rust and corrosion can also fuse the exhaust manifold studs to the engine block of your older vehicle. Whether it’s to replace the manifold itself or to get at other parts inside your engine, off the bolts must come.
Do you need to replace the exhaust manifold?
An exhaust manifold performs a single but vital function on your car and takes gases from the engine through to the exhaust pipe. Since these gases are poisonous, this is highly important. However, from time to time, the gasket on the manifold will need replacing which involves removing the exhaust manifold completely.
How to get rid of stuck exhaust manifold bolts?
Learn how to remove stuck exhaust manifold bolts or studs. Wades shows you a little-known trick to help loosen up some of those old, seized and corroded exhaust manifold bolts. This can be a life saver tip and is a very common problem for gas and diesel applications.
How are exhaust manifold pressure and intake manifold pressure related?
Exhaust manifold pressure is governed mainly by engine exhaust flow rate, turbine area, and exhaust manifold volume. It affects turbine pressure ratio and hence intake manifold boost pressure. It also largely affects the engine delta P (i.e., exhaust manifold pressure minus intake manifold pressure).
Learn how to remove stuck exhaust manifold bolts or studs. Wades shows you a little-known trick to help loosen up some of those old, seized and corroded exhaust manifold bolts. This can be a life saver tip and is a very common problem for gas and diesel applications.
Do you need to remove the riser on an exhaust manifold?
Generally, you are going to need to remove the bolts that connect the riser as well as removing any exhaust hoses. This should allow you to disconnect the exhaust manifolds. Remember to wait to remove the exhaust manifold until everything has cooled down.
What to look for in an exhaust manifold?
There should be no evidence of rust in the gas-only chamber on the side that connects to the manifold (expect to see black carbon). If there’s rust, water is probably leaking in through a hole in the water jacket at the upper loop of the riser. Also look carefully at the metal faces where the manifold and riser join together.
Why are the studs on my exhaust manifold breaking?
Dissimilar metals such as a titanium exhaust manifold bolt and the softer aluminum head do not work well together, especially when exposed to extreme heat, cold or road debris like salt. A chemical reaction takes place which essentially welds the two components together.