WHITE SMOKE AND KNOCKING WHEN COLD THATH WAS AFTER A ENGINE WHASH

White smoke means your engine is burning it's antifreeze. You have a problem with either: an intake gasket or a head gasket

It is actually steam. The head gasket has failed and the knock is either the pistons trying to compress liquid or the oil has been thinned out from the coolant.

The smoke under hood means that u need replace gasket between exhaust pipe and engine but smoke and knocking is not very good, it looks like your engine pistons has cracks and u r loosing oil by smoke time to time, i'd buy used engine from crashed car with less miles on it

normal to see a little white smoke when first start engine on cold morning.as engine warm up should not see white smoke not heavy.if you getting a lot heavy smoke you have leaking head gasket.check engine oil it should look milky looking.

didnt state color of smoke if blue smoke burning oil internal damage to engine and with knock could be rod--bent/stuck valve [blown engine ] white continuous smoke burning coolant usually a blown head gasket but add knock engine damaged

White smoke tells me coolant is getting into the cylinder's, blown head gaskets or crack heads, have a block test done.

hardly likely the exhaust job would cause that, but yes it sounds like you got a blown head gasket. badl lock stricks hmm! also preasure test cylinder head for leaks

White smoke usually occurs when there is not enough heat to burn the fuel. The unburned fuel particles go out the tailpipe and typically produce a rich fuel smell. It's not unusual to see white smoke in the exhaust during cold weather until the engine warms up.

Faulty glow plugs or control module can cause white smoke on engine start up.

Low engine cranking speed may also produce white smoke.

If white smoke is still visible after the engine has warmed up, the engine may have one or more bad injectors, retarded injection timing or a worn injection pump.

Low compression or air in the fuel system can also be a source of white smoke.

Make sure oil level is adequate.

Also, this could be an exhaust leak that is being closed as the manifold and/or block heats up.