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Rattling Sound In Engine Bay


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There's a weird rattling sound in my engine bay, as soon as i start up the engine, i've hoisted the car up on jacks and upon closer inspection, still can't find the actual cause, the rattling seems to be coming from the engine itself, any idea guys wad is wrong? its quite irritating even when im driving and as soon as i put the car in neutral, the noise quietens down, but seems like getting worse.. im getting pretty worried.. anyone can help?

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  • 1 month later...

Yesterday I noticed a rattling sound in my engine compartment. Mine is a 2006, 2.7, manual with 43Kmiles. Its a constant noise but more noticeable when idle. From sitting on driver's seat, I can hear it coming from center- towards right of engine bay. I'm suspecting water pump or fan/blower. So far no overheating. I will get in engine compartment this coming weekend to inspect.

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  • 2 weeks later...
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Possibly one or more of the chain tensioners bleeding down. Often goes away by switching to a slightly heavier oil, like Castrol Syntec 10W-40. If heavier oil does not help, it will need more significant mechanical help……..

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  • 10 months later...
  • Moderators
  1. Take it to the dealer so the problem is at least on record.
  2. Ask them to check the cam deviation values at idle; if they are steady, you are in good shape; if they swing back and forth, you/they need to worry.
  3. Try running a heavier weight oil; I prefer 10W-40, many like 5W-40.
  4. Pull the oil filter and cut it open; if it is clean, you are in good shape; if it holds metal flakes, specs of flat black plastic, or granular metal the can be picked up by a magnet, you/they need to worry.

Edited by JFP in PA
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