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BruceT

Member Since: 01 Nov 2010
Location: South Africa
Posts: 518

JST just to reassure you....... you are not losing your marbles even if they tell you you are.

I have experienced exactly what you have. Only after long (3/4 hour and longer) cruising trips towing, have I had this noise. When driving shorter distances I have not been able to replicate the noise.

I dont believe it to be boost pipe, manifold related etc, as I would assume it would make the noise all the time, especially in city traffic when running hot. Mine first happened around a year ago and has probably done it about 3 times since then. (around 18000 kms have been covered since then)

Also when it made the sound I tapped off and accelerated again and it then stopped making the noise. Also mine only made the noise in 1st, and 2nd then stopped (half way through 2nd gear) also telling me its not something like a leaking pipe or manifold.

29th Feb 2012 6:09am

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

P0299 Turbo/supercharger underboost

quite "normal" in most of the Defenders Puma Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

29th Feb 2012 7:31am

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

2011 Defender 110 Puma 2.4 USW Stornoway Grey

Hi Bruce,

mines only done it on one particular trip and that was towing and coming to a rest to then pull away again. have fitted a SG now as i am interested to see Water temp as and when it does it again.

i dont think its a manifold issue either for reasons as given. Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

29th Feb 2012 2:33pm

BruceT

Member Since: 01 Nov 2010
Location: South Africa
Posts: 518

Hi James,

I think we should close my thread and refer to this one.....

What is a SG?

Also if you do find the problem if there is one, please post it here and I will do the same. I have subscribed.

I will again be doing a longesh highway trip this weekend but will not be towing. Will see if it does it again.

29th Feb 2012 2:42pm

BruceT

Member Since: 01 Nov 2010
Location: South Africa
Posts: 518

I just had another thought......I was towing in 40 deg C plus temperatures, I would assume you to be in European winter temperatures, so it can not be heat related?

Just guessing again......

29th Feb 2012 2:45pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

i was towing in Nov UK weather so cold ambient.

SG= scan gauge.

will use this thread.

have a tow trip, same load, this weekend, will see if it happens again. Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

29th Feb 2012 4:16pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

well its in for its 2nd service currently and i also asked them to look at this issue as iuts got slowly worse

and

Alive Tuning wrote:
It sounds to me like a leaking turbo/manifold joint.

was right, depsite the checks too. loose stud on exhaust manifold and failed gasket.

i asked the guys if this was a common issue, response

'well we dont see it on every defender.............'

Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

14th Oct 2012 7:10pm

wslr

Member Since: 18 Jul 2010
Location: Wellington, Somerset
Posts: 581

Mine did it, Taunton replaced the gasket under warranty and then 2 days later it started doing it again.

Hasn't been such an issue since the de-cat though.

14th Oct 2012 7:20pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

that doesnt sound good. do you know what caused it to fail either time? did you get it fixed the second time? Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

14th Oct 2012 7:24pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

do Pumas has O2 sensors in the exh?

found this:

First, yes the vehicle will experience a power loss, but as I said it may or may not be noticeable at first. What will be noticeable is the increased fuel consumption. This is due to the fact the O2 Sensors are detecting Oxygen in the exhaust gases. This indicates that there is unburned fuel in the exhaust and will send a signal to the ECM to lean the air/fuel mixture out.

and was wondering if that accounted for the extra fuel the truck seems to be using.[/i] Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

14th Oct 2012 7:26pm

T1G UP

Member Since: 08 Dec 2009
Location: Bath
Posts: 3101

2011 Defender 110 Puma 2.4 XS CSW Orkney Grey

theres not one in the cat section and i can't remember seeing one the other day. same pipe as a td5.

14th Oct 2012 7:46pm

wslr

Member Since: 18 Jul 2010
Location: Wellington, Somerset
Posts: 581

Only for Petrol engines, not diesel.

14th Oct 2012 9:02pm

BruceT

Member Since: 01 Nov 2010
Location: South Africa
Posts: 518

jst wrote:
well its in for its 2nd service currently and i also asked them to look at this issue as iuts got slowly worse

and

Alive Tuning wrote:
It sounds to me like a leaking turbo/manifold joint.

was right, depsite the checks too. loose stud on exhaust manifold and failed gasket.

i asked the guys if this was a common issue, response

'well we dont see it on every defender.............'

Since fitting my inter-cooler mine has not made the noise. Strange?

15th Oct 2012 5:41am

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