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hank

Member Since: 12 Sep 2016
Location: South Wales
Posts: 2301

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Boost Leak?

Perhaps it's my paranoia but recently the turbo hiss seems to be louder than I had previously noticed. The hiss is emanating from the passenger footwell kind of area on turbo spool up.

Any known issues? Tricks of the trade to test for leaks? Having someone rev the engine while stationary doesn't seem to spool up the turbo?

I have not noticed any other symptoms to speak of such as power loss, erratic idle etc

Cheers

7th Jun 2018 8:37am

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

You don’t have an allisport intercooler do you? Ray
My build thread
http://www.defender2.net/forum/topic17615.html

7th Jun 2018 9:19am

adeparko

Member Since: 13 Feb 2015
Location: West Lothian
Posts: 41

Check around the intercooler hoses for a split in the rubber

7th Jun 2018 9:27am

hank

Member Since: 12 Sep 2016
Location: South Wales
Posts: 2301

No alisport intercooler.

How do I check, soapy water?

7th Jun 2018 9:30am

Harry.O

Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 716

Not sure if you are TD5 or TDCi but we had a lot of problems with intercooler pipes and intercoolers splitting on a fleet of TDCis. The latter used to separate between the plastic end tank and the main core.

Sopay water works well for finding leaks

2005 Td5 110 Hardtop
1989 300Tdi 90 Soft top
1992 200Tdi 90 Truck cab with Land Cruiser axles

7th Jun 2018 10:09am

hank

Member Since: 12 Sep 2016
Location: South Wales
Posts: 2301

2.4 TDCi

Ok so I need to get under the bonnet with a sprayer then and douse the pressure side of the inlet. Will report back

7th Jun 2018 11:02am

rallysteve

Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2237

2002 Defender 110 Td5 DCPU Keswick Green

Also worth checking that no rubber grommets have been dislodged in the footwell resulting in more noise being apparent. Not sure on TDCi bulkheads but the rubber grommet in the passenger footwell for the A/C pipes can let a lot of noise through if dislodged.

Steve 02' 110 TD5 Double Cab Rebuild Thread

7th Jun 2018 11:27am

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2178

mk1collector wrote:
You don’t have an allisport intercooler do you?

Check boost on diagnosticsor boost gauge. Should be roughly 14psi if it hasnt been messed with.

Check if any of your boost hoses have oil residue around them anywhere. If so clean them up and check after a few drives Instagram @defender_ventures
Empire Tuning - Agent

7th Jun 2018 12:13pm

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

2004 Defender 90 Td5 X-Tech LE Zambezi Silver

I had a similar problem on my Td5 last year, it was making an increasingly loud hiss from the front while giving it full beans, especially uphill.

I suspected either intercooler or hoses but there was nothing visually obvious and since it was only hissing while driving, I decided the best way to diagnose it while stationary was to pressurise the intake system.

I removed the pipe from air filter box to the turbo inlet and found a plastic pot which was a snug fit over the turbo inlet, I drilled a hole in the bottom of the pot and fitted an air hose fitting which I was able to connect to my compressor and apply about 15PSI.

Lo and behold it was the intercooler which had split along one of its seams, it was partly hidden from view by the air-con condenser but immediately obvious where the noise was coming from.

Click image to enlarge

Click image to enlarge

A quick visit to a friend of mine who's a dab hand with aluminium welding and it's good as new.

7th Jun 2018 6:17pm

adeparko

Member Since: 13 Feb 2015
Location: West Lothian
Posts: 41

If you floor it going up a hill, do you get lots of black smoke out the exhaust?

This would also usually point to a split hose

7th Jun 2018 6:20pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

What make intercooler is it Clive? Ray
My build thread
http://www.defender2.net/forum/topic17615.html

7th Jun 2018 7:58pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

bankz5152 wrote:
mk1collector wrote:
You don’t have an allisport intercooler do you?

Sorry, forgot I’m not allowed an opinion on a product I bought

Ray
My build thread
http://www.defender2.net/forum/topic17615.html

7th Jun 2018 7:59pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2178

Of course. Though you seem to slag em off anytime you can as if they where Britpart!

Like I said dude look for oil residue around the IC or hoses, bit tell tale of a boost leak. Instagram @defender_ventures
Empire Tuning - Agent

7th Jun 2018 8:25pm

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

mk1collector wrote:
What make intercooler is it Clive?

I couldn't say to be honest, it was on the 90 when I bought it 3 years ago, the only clue might be that it was re-mapped by td5alive.com, now known as Alivetuning.com. maybe they supplied Alisport ones back then - or maybe not?

7th Jun 2018 8:32pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

bankz5152 wrote:
Of course. Though you seem to slag em off anytime you can as if they where Britpart!

.

I’ve received better quality parts from britpart in the past than the part I bought from allisport so what do you expect? Ray
My build thread
http://www.defender2.net/forum/topic17615.html

7th Jun 2018 8:52pm

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