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I can think of two factors that would cause manifold cracks. One is the constant heating (expansion) and cooling (contraction) of the manifold, and the second is the vibration. These two factors both result in metal fatigue and are the likely cause of most failures. Perhaps there are experts in metal fatigue out there who would like to weigh in with a more informed response. == I've had some experience with Fatigue, but I'm no expert. I would not expect the manifold to fail due to fatigue as that implies it is under cyclic loading. The heat cycles can be a factor but that is a thermal problem and not a loading problem. I would expect that it has to do with heat cycles and rapid cooling due to something like rain hitting the exhaust. Custermen
What else can I help you with?
Can exhaust manifold leak cause you to burn oil?
can exhaust manifold leak cause you to burn oil
New fuel cap new thermostat no vacuum leaks injectors clean What else could cause OBD2 code P0170?
Check for cracks in the exhaust manifold - Air pulled in can lean the exhaust and cause the oxygen sensor to give false readings
What would cause 1988 ford ranger exhaust manifold to get red hot?
exhaust?
Can a crack in a car manifold cause health problems?
if it is the exhaust manifold ,yes. if your breathing in those exhaust fumes you can get carbon monoxide poisoning
Can a crack in the exhaust manifold in Oldsmobile cause it to sound louder going 45 to 55 miles an hour?
That would certainly be one of many likely results. The manifold basically carries the exhuast gas and the exhaust noise from the engine itself to the system that "muffles" it. Any cracks let all these things escape.
What would cause water to leak out at exhaust manifold and tailpipe at same time?
A broken piston ring is the most common cause of water in the exhaust manifold. A bad valve in the cylinder head can also cause the problem.
Can holes in the exhaust manifold cause a P0420 code to be thrown?
Yes.
Will a bad valve cover gasket cause smoke from exhaust?
No, it will not cause smoke from the exhaust pipe. However the leaking oil can drip on the exhaust manifold where it will be burnt and smoke.
What are the symptoms of manifold exhaust gasket leaks on a Chevy truck?
Intake manifold leaks will cause the engine to idle rough and get poor fuel economy. An exhaust manifold will have no symptoms other than the sound of the leak.
Will a crack in the exhaust manifold cause the check engine light to come on?
It could.
Why does the exhaust manifold glow red hot?
Advanced timing can cause that to happen
What can cause oil leaking from behind your exhaust manifold?
Valve cover gasket
