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megatoad

Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358

2006 Defender 110 Td5 XS CSW Zambezi Silver

Worrying bursting noise

Yesterday I was cruising to work, I had done 14miles up the A41 at 60mph then was wandering through country lanes to the office, on a nice long straight I gently got up to 50mph when there was a lod pop and a hissing which dissipated after around 30 seconds!

I initially thought a tyre, being a 110 SW I run 48psi in the rears as specified. But there was no tack-tack-tacking from any object and all tyres and pressures appear fine.

However coming home downhill on the A41 the motor was struggling with foot to the floor to make 70mph and falling back on uphills. I will add that it was the hottest day of the year !

Last month I had the EGR deleted and a remap. The 110 has been driving superbly since then, cruising at 70 with plenty of oomph.

This morning on the drive to work all feels well though I used another route and it is pulling well.

I cant see anything visibly but have not had the opportunity for a good look under the bonnet.

I am wondering if the higher boost pressures and temps of the remap may have cracked an intercooler end cap

Any ideas people? He who dies with the most toys wins

Defender 90 & 110, S1 80", Disco 1, S111 88
LRSOC & CVLRC

15th Sep 2016 8:48am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17450

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Intercooler pipe/hose would be my first thought.

15th Sep 2016 10:42am

bpman

Member Since: 21 May 2008
Location: Oslo
Posts: 8069

2008 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black

if it is the hoses, this should fix it

Click image to enlarge

15th Sep 2016 11:24am

megatoad

Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358

What engine is that? the TDCi

The one my 110 is a TD5 He who dies with the most toys wins

Defender 90 & 110, S1 80", Disco 1, S111 88
LRSOC & CVLRC

15th Sep 2016 11:55am

bpman

Member Since: 21 May 2008
Location: Oslo
Posts: 8069

ah, td5 stainless intercooler pipes are available, in the UK and much more reasonable price .. can't remember who sells them but there's a thread somewhere on here ...

15th Sep 2016 12:02pm

megatoad

Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358

I have just been outside and popped the top off the engine and had a look at the hoses, unfortunately I cannot see anything suspicious

Click image to enlarge

Click image to enlarge He who dies with the most toys wins

Defender 90 & 110, S1 80", Disco 1, S111 88
LRSOC & CVLRC

15th Sep 2016 12:36pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17450

Well, a pop followed by a whoosh can only be a fairly high-volume pressurised thing failing and depressurising, which narrows it down to tyres (you'd have noticed), charge air circuit (intercooler or related pipework), or cooling system (you'd probably have noticed). I can't really see what else it could be, unless you ran over a plastic bottle.

The intercooler pipes are a well-known problem on the TDCi (hence the comments above) and often you can have a pipe which superficially looks fine but has a split which opens up under pressure, resulting in poor performance and a hissing or farting noise.

If the intercooler itself had ruptured I would not expect the performance ever to improve, whereare if you have a hose/pipe malfunction it may be that it is OK up to a certain boost pressure, when it releases rather like a safety valve.

I would be inclined to "fondle" the hoses to feel for soft spots and other defects which are not visible to the naked eye or are in areas you can't see before ruling them out.

Last edited by blackwolf on 15th Sep 2016 2:59pm. Edited 1 time in total

15th Sep 2016 12:53pm

bm52

Member Since: 04 Apr 2010
Location: Kent
Posts: 2189

2014 Defender 110 Puma 2.2 XS CSW Havana

Blackwolf - that is exactly what happened to me. MR LR Assistance man could not find any leak etc until we 'fondled' each pipe and then found a split that only opened under quite a bit pressure. Superglue and gaffer tape got me home.

15th Sep 2016 1:33pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

Did you run over a football?

1988 90 Td5 NAS soft top

2015 D90 XS SW

15th Sep 2016 2:07pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 942

2000 Defender 110 Td5 XS CSW Epsom Green

Just a thought... Is your AC still working? Maybe it blew its load? Pow woooosh! 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)

15th Sep 2016 2:21pm

megatoad

Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358

Yeah, AC fine.

There was nothing on the road.

Its one of those annoying noises that at an Landy driver you lock ont as something that should not be there.

What does worry me is the poor high speed performance last night when it failed to pull 70 uphill. I had just started getting used to all the new power, it was almost as perky as the wifes TDCi.

I'm going to keep monitoring it on my regular hills, lets see how it goes up Ivinghoe Beacon tonight He who dies with the most toys wins

Defender 90 & 110, S1 80", Disco 1, S111 88
LRSOC & CVLRC

15th Sep 2016 3:54pm

agentmulder

Member Since: 16 Apr 2016
Location: Outer Space
Posts: 1324

I once had a HUGE bang from the rear, was googling stuff like 'can diesels backfire' and similar, spent ages looking under the vehicle and engine.

Most likely in my mind now, is that kids were throwing stones from a bridge i was passing under, nice ding in the roof found months later.

Doesn't explain your hiss though... Solved the bowel problem, working on the consonants...

Last edited by agentmulder on 15th Sep 2016 7:31pm. Edited 1 time in total

15th Sep 2016 7:01pm

megatoad

Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358

No LOL

And to add hope, the TD5 drove beautifuly this evening !

Problem is after 25 years of Land Rovers strange noises make me paranoid ! He who dies with the most toys wins

Defender 90 & 110, S1 80", Disco 1, S111 88
LRSOC & CVLRC

15th Sep 2016 7:25pm

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