Engine knock amp rattle accessory belt pulleys or engine internals

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=LC3I_IN3upE

After replacing the accessory belt and idler/tensioner pulleys, this Ford Duratec HE developed an annoying knock or rattle under certain revs and loads. It's difficult to tell by ear whether a knock is coming from within the engine, or if it's maybe a bad pulley. • You can disconnect the belt from the crankshaft and run the engine safely for a short time, to identify if the engine is making the noise without the belt and pulleys being turned. • More on the belt pulleys ~ • Replacing the belt idler/tensioner: • How to: Change auxiliary belt pulle... • More on the belt tensioner: • Auxiliary belt tensioner, noise aft... • Water pump: • How to (fail): (Nearly) replace water... • Over-running alternator pulley (OAP): • How to: Test replace overrunning al... • Amazon links for the Duratec HE (check your part no.s): • Serpentine belts pulleys ~ US: https://amzn.to/2Gugnmh | UK: https://amzn.to/2GLgt8o • 6PK2225 as featured ~ US: https://amzn.to/2TNQpNC | UK: https://amzn.to/2tpyl0v • Idler as featured ~ US: https://amzn.to/2BCt0aW | UK: https://amzn.to/2IgAQg6 • Tensioner featured (Continental # 49405): https://amzn.to/2VFScG2 • More tensioners ~ US: https://amzn.to/2S6gW6R | UK: https://amzn.to/2SFdgy6 • Water pump ~ https://amzn.to/2XLTdfC • Or, for generic pumps the Ford part # is 1142427 ~ US: https://amzn.to/2ZCqbAS | UK: https://amzn.to/2W5qSAE • Alternator over-run pulley, try searching ~ US: https://amzn.to/2lvN0H6 | UK: https://amzn.to/2lvSVfr • More detailed links for tools etc are in the specific videos above. • Using the above links helps support my channel and is appreciated!

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