Question about Cars & Trucks
Overhead engine noise or rattle when revving from idle or low revs seems to go away up 2500 revs
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Posted on Jan 02, 2017
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.
Posted on Nov 04, 2008
If this sounds like a tin can rattle it is likely a loose heat shield on top of the catalytic converter. They come loose after time and corrosion take their toll.
Posted on Feb 25, 2009
I had the same problem (X-type 2.0d 2004). The stutter was cured on mine by getting the ECU fashed with the latest firmware. This is a known problem and the update does cure it (£28), I didn't bother with all the tests the garage wanted to.
The noisey engine at idle is the alternator belt. It resonates at idle and causes the noise, There is a modified bottom pulley, tensioner and belt kit, but it is rather expensive ~£200 plus fitting (around 4 hours labour). Mondeo's have the same problem but that kit doesn't fit the Jag.
Hope this helps
Posted on Mar 16, 2009
When catalytic converters go bad, the porcelain matrix inside comes loose and is noisy.
But you can just unbolt it, break up the loose chunks, pour out the pieces, and it will run better than ever.
If you don't pass the next emissions test, then replace it.
But it could just be the heat shield rattling instead.
Take the shield off first, to see if it goes away.
Posted on Jan 03, 2010
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