Could be a lifter that just hasn't gotten oil at the start. If it is a small ticking, it's not a big problem. Often using an oil flush just before an oil change can loosen up sticky lifters. I have also tried a few ounces of transmission fluid in the oil and that has worked with my lifter noise (2004 Suburban).
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SOURCE: GM 3.8L engine ticking noise after intake gasket change.
check where the thermostat housing is, there is a plastic cross over to the other side of the intake. The intake cracks right there. Loss of coolant will cause overheating, plus if you look behind the alt. or remove it and start the engine, you will see where it is leaking, that`s if it is leaking to the outside. Most times it does. If that is not the problem, then with a blown head gasket you will have white smoke out the exhaust all the time, and the coolant level will of course go down. If it is the intake gasket, then you will have coolant in the oil, easy to see when you check the oil, creamy brownish colour and of course you will lose coolant and it will overheat also. Most likely since you said `white smoke water coming out around front of intake
ticking noise is usually lifter noise. your engine is fine.(to a point) try changing your oil put in a thicker oil to prevent metal to metal contact. go for a 15/40 20/50. let it run for a while(few miles), if it doesn't stop buy an additive called "engine lucas", that will dilute your oil just enough to allow it to lubricate your lifters. also when your oil level drops or your oil becomes dirty your lifters will make that ticking noise.(the one that increases with engine speed)
a blown head gasket 99% of the time will cause your car to smoke either blue or white.
SOURCE: Rattling sound when accelerating on 2007 Forester
On mine, I got under there and there are rocks rattling in the heat shield. There are factory made holes in it, and the rocks sit in there like eggs in a carton and rattle when the engine hits a certain vibration frequency which is basically when it is at a stop light or idling. The repair shop wanted to charge to cut them off but I think I am going to drill bigger holes so the rocks fall out, as they are pretty tiny.
SOURCE: Valve adjustment
The EA82 does not use shims. Ticking almost always caused by a failed oil pump to engine block gasket failure. The gasket slowly fails which then allows the oil pump to pump air along with the oil. Replace the "Mickey Mouse" oil pump gasket.
SOURCE: Engine make Knocking noise when cold
I have the same problem on my 2.0L 2001 Legacy auto. It began about 1000 miles ago. It has now done 84k. From my online searches this is most probably 'piston slap', and is not serious. To save weight Subaru shaved down the skirts on the pistons. With normal engine wear the pistons will at some point rattle against the cylinders until the engine is heated up and the pistons expand. The rattling should go away after a few minutes. If it persists say 10-15 minutes, it may be another problem.
SOURCE: how to solve engine lifter tick noise
Get the heads worked on or replaced it might need a valve lashment.
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