Manifold Gaskets

Intake Manifold Gasket - Stalling or rough idling as additional air is being sucked into the engine that the computer has not allowed for. It can impact acceleration and cause a reduction in performance and fuel economy. You may be able to hear it.

Exhaust Manifold Gasket - Ticking or tapping sound when you first start the engine. As it warms up it will reduce or disappear. The exhaust will leave staining where it is leaking. Impact on performance is not as bad as the intake, though fuel economy may suffer.

Can be various reasons for both intake and exhaust. The cylinder head they are connected to expands and contracts everytime you drive due to the heat generated by the combustion process and is the hottest part of the engine. This continued expanding/contracting can cause an eventual failure. As can incorrectly tightened bolts or they can loosen due to expansion, contraction and vibration.

Manifold gaskets, whether exhaust or intake are not complex things to replace. They can be very time consuming as you may need to remove a lot of items to get to them. Before doing the job it is a good idea to see what needs to be removed. You may find buying a gasket kit may not be a bad idea. That way you can renew a number of gaskets and may be cure some minor leaks at the same time.