Loud clacking noise when cold start up, left side of engine, eventually goes away (mostly)
Possibly a weak hydraulic lifter.... BUT, my Chrysler Corp. V-6 engine does the same thing. I find that the lower the oil level and the colder it is outside, the more clacking it makes until it warms up. I've considered trying a lighter weight motor oil and seeing if that would help.
Pull valve cover off and look for any bad lifters. Or could be piston rod. Sounds like sticky lifter. Not good.
SOURCE: engine noise at cold start-up.
Sounds like your oil pump inside the engine is not pumping oil fast enough when you start your vehicle its common problem for mitsubishi motors my car does the same thing.
good luck
SOURCE: 2002 jeep liberty siren whining noise on start up
I had the same problem at about the same mileage. Replaced the power steering pump and the start up screaming went away! ( The Jeep's and mine!)
SOURCE: 2004 Nissan Quest - Engine chatter/knocking
Ther e is a chance your injectors are leakin g down and there is excess fuel in the cylinders. Not a good thing. So, you fuel pressure and injectors need chkg. good luck
SOURCE: 2006 Dodge Gr. Caravan. Loud humming noise upon
Misalignment of the belt, incorrect belt, worn or loose tensioner, Too tight of an adjustment (many service centers do this on purpose so when the belt breaks in it becomes properly adjusted, I do not believe in this philosophy), The belt is actually one long belt called a serpentine belt.....
SOURCE: Ticking/Tapping when car starts but goes away???
I had what sounds like the exact same problem. It was an exhaust leak from the left (driver's) side exhaust manifold. This engine has a history of the manifold bolts breaking and causing the exhaust leak. The engine is also used on some Dodge vehicles. It sounds like a tick and I almost mistook it for a bad lifter. I took it to the local Jeep dealer who confirmed the exhaust leak. I replaced the left manifold completely and replaced bolts/gaskets on both sides (left/right) and it fixed the problem. Be careful, as the dealer tried to gouge me on the price. You are looking in the ball park of $600 parts/labor. I got parts for $120 and it took the better part of a work day to do the job.
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