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airborne

Member Since: 20 Dec 2017
Location: Kendal
Posts: 12

2007 Defender 110 Puma 2.4 SW Corris Grey

Change in engine sound

Something's changed, but I don't know what might have caused it.

A couple of months ago - basically overnight (so something must gave happened mechanically) the engine note changed. Under load, at lower revs, the engine note has become a lot more rattly. It hunts slightly on return to tickover.

At normal revs, while driving around town, it sounds pretty much the same as it always has. However on longer trips, when the engine is hot and has been at motorway speeds for say 30mins or more, it sounds really rattly, like it's chewing gravel. So much so that my wife said "Should it sound like that?" although she's usually blissfully unaware of mechanical noises.

Performance hasn't changed at all, it still feels the same under acceleration etc. And once that change in engine noise/rattliness had happened, it's stayed exactly the same since.

Any thoughts?

2nd Oct 2018 6:05pm

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1568

Stop driving it and take it to a garage!

2nd Oct 2018 7:17pm

airborne

Member Since: 20 Dec 2017
Location: Kendal
Posts: 12

Yep, done that, run through engine diagnostics and nothing much showing. Head scratching ensued.

Injectors maybe? I'm not qualified to know what might make a difference.

2nd Oct 2018 10:26pm

ozzie1989

Member Since: 25 Feb 2009
Location: Wales
Posts: 282

2010 Defender 110 Puma 2.4 USW Bonatti Grey

I hate to blame the VCV but have a look in this forum for the term VCV and you'll find lots of threads with similar issues.

Personally I'd try a Pump and Injector Relearn first before changing the VCV.

Also worth checking the injector seals, they run really well even when the seals are past it. Tell tale signs are unexplained oil loss and wet oily reside around the top of the injectors. Now: 2010 2.4 TDCi 110 Utility Wagon
Then: 2004 2.5 TD5 90 Hard Top (X-Tech Edition)

3rd Oct 2018 2:53am

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