[Other] PD130 Groaning noise on shut down - TDI & Diesel Forum - uk-mkivs

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PD130 Groaning noise on shut down

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#1 Steve_



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Posted 29 April 2018 - 09:47 PM

I've just bought an 07 Mitsubishi Outlander with a PD130 engine (BSY) - the one with the EGR at the front. Sometimes when I turn it off there's a groaning / mooing noise from under the bonnet. Is this normal?

#2 gerrywac


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Posted 30 April 2018 - 04:57 PM

Possibly down to electrically operated air flap on the anti-shudder valve (cuts off air supply to the engine to prevent any over-run when the ignition is turned off.

I've had my Mk5 1.9 tdi for well over seven years and the valve shutting can sometimes be quite obtrusive (as you describe) when switching off but never any bother with it.

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#3 dopiaza


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Posted 30 April 2018 - 10:09 PM

Only time I've heard a noise like you describe is if you have air con and the fans aren't all working properly. You shut the engine off and pressure rises in the system which I guess vents via the 'emergency' valve. Mooing describes it perfectly. Builds up a few seconds after shut down then fades away after a few seconds.

#4 Booster


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Posted 01 May 2018 - 08:35 AM

Other source of groaning noise is the black box that is used on some of the engines instead of the N75 and N18 valves. These can leak and make a moaning noise when the engine stops. The bigger issue that these can cause in the long run is boost error codes due to vac leak in the system and the tandem pump being unable to keep up.

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