Hi,

i have a 2012 range rover sport HSE sdv6. When accelerating it sounds like i can hear an air leak sound from under the bonnet after about 1300rpm and goes at around 2500rpm which suggests a boost leak however no loss of power. seems to be louder when i accelerate hard. when im gentle on throttle doesnt seem to be as loud. Any ideas where to look? Or anyone else had this?

Thanks in advance Matt

could possibly be a leaking manifold gasket

Hi

karlos01 thanks for your reply if it was manifold gasket would it not be constant rather than easing off at higher RPM

Thanks

got a leaking manifold gasket on mine it makes a noise when under load but once it up the revs it quietens down and ist so loud that's why I asked if it might be that

Hi Willis
My opinion from (same?) experience
Two issues. the first and most important is the broken intake manifold ; that's sure
Second, more subtle, due to the fact that it's very difficult (impossible) for this failure, so evident to ear , does not exploit an anomaly of recovery mode. This suggests a mod to the ECU (rechip) . A common way which is done to overcome resticted performance mode eg recovery mode.

Good luck

Alex

Hi Alex

I looked at them lastnight it looks like passenger side has a new manifold but drivers side is an old one so might look at changing that as a matter of cause. A company i used to work for have an ultra sonic leak detector so might look over manifold see if i can pick up air movement / leak.

Thanks