what causes a timing chain cover gasket to leak?

Answer 1

age /heat/silicone

yes i listed silicone that stuff is prone to leak use the right stuff (gasket seler) use caution if sealing an oil passageway

Answer 2

All gaskets are prone to leaking over a certain period of time. The constant expanding and contracting of metal engine parts as they heat and cool, causes the gasket to expand and contract, flexing it to the point where it just doesn't seal anymore. It could have been valve cover gaskets, oil pan gasket, etc. If replacing a gasket, make sure the gasket surface on both sides are free from old gasket material. This will ensure a proper seal.

Answer 3

2000 Ford Taurus engines (Duratec 24 valve and Pushrod) can not and do not leak coolant into the exhaust systems from the water pumps. The water-pumps on both engines bolt to the exterior of the engine block. Find another mechanic ASAP. You are proud owner of the top brand of car for head-gaskets leaks. The morons at Ford circle each cylinder with four head-bolts instead of five or six as other manufacturers do. The sooner you have a trusted private mechanic do an inexpensive *cooling system pressure test the sooner you will find any external or internal coolant leaks.

Answer 4

the gasket could be tightened down to tight or to loose,or it could be the front seal in it leaking,usually they wont leak from the gasket just the front seal,if its a gasket leaking it will have to be removed and repaired,that's the only fix for that problem,good luck on it.

Answer 5

All gaskets eventually leak, or if they are damaged upon installation, and the possibility exists that the cover bolts are loose, take your pick

Answer 6

A small opening or gap in the gasket.

Answer 7

dry rot, or a recent change of oil weight, usually to something more thin, or synthetic to regular/regular to synthetic.