You need to replace the timing chain guides/tensioners. 200-2003 crown vics are prone to that problem. 2004 and up are all okay (with new modified design.)
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there are 2 engines 2.0 / 2.3 and they both have chains if you are getting a rattling sound from the cover front the guides are worn or the chain tensioner are worn the guides have nylon chain runners on them and if they wear down the chain is rubbing against the metal arm that the nylon is mounted on if this is a high mileage motor I would suspect this because the chain can not be kept tight because of the worn guides have now caused the chain to be slack and its rubbing against the front engine cover but you must be sure before opening it up that its not the water pump or belt tensioner pulleys making the noise if that's what your hearing the water pump will sound like a marble tumbling around in a can the pulley's will sound like constant friction grinding of the dry bearing inside against the bearing race there also may be a chirping sound of the belt being made from it grabbing each time the bearing catches inside and releases the chain will sound like a constant rattling as if you drag a metal chain on a ceramic tile floor and engine running condition will be rough idling and missing a bit especially when you come to an abrupt stop it may stall
I suggest you ask an experienced person listen to the noise.
Hydraulic tappets can click for a while after starting and usually aren't anything to worry about unless the noise becomes louder, harsher and more pronounced as the engine speed increases.
If the clicking is suspected to be timing chain related it would be very unwise to ignore it.
You must replace the timing chain and the tensioner assembly as well as any other parts that you find worn such as sprockets and guides. All this requires special tools and the timing cover to be removed.
Check for loose heat shields the cover the exhaust. I find this is the source of many rattles. They are made of sheet metal and if they are not clip or tightened down the low vibration frequency when the car is running at slow speed will cause them the hit the exhaust pipe/ front mainfold.
I had a nasty 'rattle' in the front of my engine on an older truck of mine (around 190,000 miles) and it was the timing chain. The guide for the chain had broken and caused my timing chain to rub against the front cover and start eating it's way out (the rattle). Got it fixed, new chain and replaced the front cover as well and everything is fine. Good luck, I hope this helps.
no it would not be the timing belt making a rattling noise it couldn possible be you heat shield around your break rotor it could be someting having to do with ur suspenion like a spring maybe what kind of rattling noise? or a regular heat shield but loose in that particular area
there will be a rattle the front of the engine. the end with all your pulleys and belts on. And it will be hard to work out if it's in the engine or the pulleys.
It is a common that a TICKING coming from the front of the engine is the timing chain guide.
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