Strange Squealing, Knocking, and Ticking

Replaced head gasket, timing belt, and water pump about 3 months ago. I also switched to synthetic oil around the same time. I've been having a ticking sound for a little bit now, but as of recently I've been getting this squeaking, squealing noise and the knocking as well. I'm thinking valves. Anyone have any ideas? Using 5w-30 Synthetic

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What is the knocking sound coming from my engine? What is engine knock? Why is my engine making a knocking noise? Engine knock, or pinging, occurs when a separate pocket of air-fuel mixture ignites after the spark has ignited the air-fuel mixture within the combustion chamber. Engine knock can be prevented using higher octane fuels, retarding ignition timing, or by using a lower compression ratio, among other solutions. Related Videos: Octane Rating - Tuning Ignition Timing - Please feel free to rate, comment, and subscribe! And don't forget to check out my Facebook page: Also check out my official website: Make suggestions, participate in forums, learn through logically ordered lessons, read FAQs, and plan your future! Now on Twitter: NEW VIDEO EVERY WEDNESDAY!

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How To Diagnose An Engine Knock.MP4
Engine noises aren't to hard to diagnose if you follow a few steps.

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