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big steve



Member Since: 24 Dec 2009
Location: hertfordshire
Posts: 2456

United Kingdom 2015 Defender 90 Puma 2.2 HT Montalcino Red
Pressure regulator noise
Hi guys there's a funny hissing noise coming from where the pressure regulator is
Could this need replacing ?

Any help appreciated steve 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P
hybrid turbo in build -done ready to fit
ashcroft atb in transfer box
6 speed auto in build
Post #145359 16th May 2012 6:00pm
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changill



Member Since: 13 Dec 2008
Location: North West - Preston/Lancaster
Posts: 27

United Kingdom 2003 Defender 90 Td5 HT Bonatti Grey
Never heard of an fpr hissing. Do you have an associated. Leak?
Is the hissing from the fpr or could it be from the exhaust manifold? Only Alcohol Can Save me Now

Nanocom Available in the North West
Post #146053 20th May 2012 10:02am
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wslr



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

United Kingdom 
I wonder if it is just air in the fuel being circulated around the head area? Confused
Post #146059 20th May 2012 10:26am
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big steve



Member Since: 24 Dec 2009
Location: hertfordshire
Posts: 2456

United Kingdom 2015 Defender 90 Puma 2.2 HT Montalcino Red
honestly it sounds like a air leak and thats without the engine running

yes the exhaust manifold is blowing but as said the engine is not running when you can hear the noise
is it common for the manifold studs to snap without it being tuned as the very front 2 were allready sheared off and the manifold was out by about 5 mm

steve 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P
hybrid turbo in build -done ready to fit
ashcroft atb in transfer box
6 speed auto in build
Post #146087 20th May 2012 2:06pm
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wslr



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

United Kingdom 
I still think it is the sound of air in the fuel running around the FPR/Head/Cooler...

Take a closer look by running a purge cycle by pressing the throttle down 5 times with ignition on. Then try to track it down more closely.

The fuel pressure is (or should be) at 4 bar so if there was a leak of any type, it would involve diesel leaking.
Post #146143 20th May 2012 7:55pm
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