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bobic

Member Since: 09 Sep 2012
Location: Laois
Posts: 4

Change in engine note

Over the last few months I’ve noticed an intermittent change in the engine note on my 2016 2.2 90. It goes from being very smooth across the rev range when suddenly it will change to a more aggressive growl type of noise, not an unpleasant sound tbh. When the change in sound occurs it’s also accompanied by a split second power surge and the defender will lurch forward.

I’ve not noticed any change in performance or fuel economy.

Has anyone else come across this?

3rd Nov 2023 7:20am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Growly sound plus power surge suggests a turbo modulation event to me, possibly a harness chafing problem. Any DTCs?

3rd Nov 2023 7:54am

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3414

2012 Defender 90 Puma 2.2 CSW Santorini Black

Its trying to do a regeneration.

I started hearing it more after I removed the center box, and fitted a straight through. Also if I stop the engine mid way in the regen, the engine stops like an old diesel rather than a smooth stop. It’s advisable not to switch off the engine mid way in a regen for 2 main reasons. 1. Better for the dpf that the regen is completed. 2. I think the turbo will be super hot.. never good for the oil/bearings. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

3rd Nov 2023 7:56am

bobic

Member Since: 09 Sep 2012
Location: Laois
Posts: 4

Thanks for the replies. Unfortunately a lot of my driving is short journeys and sometimes the engine does shut off with a clunk so the regeneration does sound a lot like what I’m experiencing. I do have a iid tool from BAS, would this tell me if it’s in regen?

How long a journey does it take to complete a regen? Only last week I done a 300 mile trip at 110 kph so I thought that would have cleared everything out for a while.

3rd Nov 2023 9:23am

BaronDefenders

Member Since: 28 Jun 2019
Location: London/Cotswolds
Posts: 896

2004 Defender 90 Td5 CSW Santorini Black

Definitely sounds like a DPF regeneration. I think they can take roughly 20 minutes from start to finish, however that is no doubt down to driving conditions and temperatures. Charlie

1949 Series 1 80 (SOLD)
2002 Td5 90 (SOLD)
2008 Freelander 2 (SOLD)

1958 Series 2 88 Pastel Green (2019 LR Legends Best Restored)
1983 V8 110 Limestone (Previously owned by Tom Sheppard MBE)
2004 Td5 90 Santorini Black (Td5INSIDE Powered & Rebuilt by CSK)
2012 Puma 110 Zermatt Silver (Overlanding Build)

Instagram: @BaronDefenders

3rd Nov 2023 9:40am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

Ah, 2.2, missed that! Yes, DPF then.

Once upon a time the turbo actuator on my 2.4 stuck at full boost and the effect was similar, astonishing power and a noise like a Vulcan with full reheat! Awesome but scary.

3rd Nov 2023 10:59am

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