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Home > General > FL2 Goose/trumpet under bonnet. 3.2 Si6. Weird noise for ya!

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CraigMate

Member Since: 26 Oct 2020
Location: Suffolk
Posts: 62

2007 Freelander 2 i6 HSE Lux Auto Indus Silver

FL2 Goose/trumpet under bonnet. 3.2 Si6. Weird noise for ya!

My FL2, Si6 has started making a new noise on cold starts. She only does it on cold starts and it doesn't last very long. The idle is a little rough sometimes when the sound is occurring but soon takes care of itself. Where do i start looking?
Thanks in advance.

16th Sep 2021 9:04 am

PRadd

Member Since: 09 Apr 2020
Location: East Lancs
Posts: 372

2014 Freelander 2 TD4 Dynamic Manual Santorini Black

Have you run over any geese recently?

I'm sure someone with knowledge of Si6 will be along shortly, but might be an idea to have a look at Volvo forums - same engine I believe & more Volvo's about. 2014 Freelander 2 TD4 Manual Dynamic
1956/7 88" Series One Land Rover
1956/7 88" Series One Land Rover - undergoing restoration

16th Sep 2021 9:49 am

Boxbrownie

Member Since: 17 Mar 2019
Location: Looe
Posts: 2053

2007 Freelander 2 i6 HSE Auto Stornoway Grey

That to me is a very noisy i6 TBH…….first thing to look at with that odd hooting is the drive belts, and pulleys. Regards

David

Lovely i6 has now gone, but not me......

Please let me know if anything in my post offends you, as I may wish to offend you again......

16th Sep 2021 10:30 am

Boxbrownie

Member Since: 17 Mar 2019
Location: Looe
Posts: 2053

Having said that and listening to the noise again it is quite regular…..another possibility is maybe some kind of vacuum being made and the hoot is when the pipe/valve (or whatever) gives in and releases the vacuum?

It is an odd one for sure. Regards

David

Lovely i6 has now gone, but not me......

Please let me know if anything in my post offends you, as I may wish to offend you again......

16th Sep 2021 10:32 am

merlinj79

Member Since: 13 Aug 2019
Location: San Diego
Posts: 315

Boxbrownie wrote:
That to me is a very noisy i6 TBH…….first thing to look at with that odd hooting is the drive belts, and pulleys.

I get the same noise sometimes, and I have a brand-new belt and idler/tensioner. Replacing the PCV valve assembly mostly took care of it although sometimes it still does it on a cold morning.

Guessing some blow-by around rings or maybe valve stem seals. The noise may be normal functioning of the PCV valve? I actually replaced the PCV when the oil dipstick started popping out, solved that problem too.

16th Sep 2021 3:55 pm

p_gill

Member Since: 06 Dec 2011
Location: USA
Posts: 1333

2008 Freelander 2 i6 SE Auto Tambora Flame

Bypass the PCV by removing the oil fill cap.

Does the sound stop?

If yes then replace the PCV.

I no then reply here and I will suggest other things to look at.

Good luck

Paul

16th Sep 2021 4:36 pm

jules

Member Since: 13 Dec 2007
Location: The Wilds of Warwickshire
Posts: 5568

2014 Freelander 2 SD4 SE Auto Firenze Red

Boxbrownie wrote:
That to me is a very noisy i6 TBH…….first thing to look at with that odd hooting is the drive belts, and pulleys.

sounds rather dieselly, straight 6s are supposed to be smooth aren't they ? eg Jag/BMW Jules

16th Sep 2021 5:10 pm

RealBeale

Member Since: 13 Jun 2016
Location: Birmingham Great Barr
Posts: 966

2007 Freelander 2 i6 HSE Auto Sumatra Black

Sounds like Willy Wonka's Inventing Room !!.......................

I'll get me coat.

16th Sep 2021 9:05 pm

Lightwater

Member Since: 21 Aug 2014
Location: Sydney Northern Beaches
Posts: 5128

2013 Freelander 2 2.0T SE Auto Fuji White

Are you sure it's not you bending over looking again & again.

My car only has 4 cylinders so only goes thfffffrpt! Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

17th Sep 2021 12:45 am

CraigMate

Member Since: 26 Oct 2020
Location: Suffolk
Posts: 62

Thanks for the replies all. She does sound.like a bag of nails when the phone is really close, scary! Believe it or not, she's super smooth and quiet in real life - other than a weird, rhythmic honk

I'll try the oil filler cap thing in the morning

I have only recently replaced the PCV and done an oil and filter. Still, it does sound a bit vacuumy.

Tar.

17th Sep 2021 3:12 pm

p_gill

Member Since: 06 Dec 2011
Location: USA
Posts: 1333

Craig,

From our Friends at Volvo

Quote:
Perform a crankcase ventilation test according to VIDA. Using the tool specified in
VIDA, the gauge will seem “out of range”. Normal PCV vacuum at idle for the Si6 and
Si6T engines is between -0.2 kPa and -1.0 kPa.

If that makes sense to you then no need to read further

For me Inches of Mercury are more familiar units.

At idle a typical engine is around 18 inches of Mercury

Converting 1.0 Kpa to inches of Mercury equals 0.29 inches of Mercury

The negative number from Volvo just indicates that you have a Vacuum in the engine and not a positive pressure.

This is a difficult pressure to measure (it is very low)

To over come this difficulty the Volvo owners will remove the oil fill cap and place a disposable glove on the valve cover where the fill cap was and check to see if the glove inflates or deflates.

Inflates = PCV not functioning (no vacuum)

Deflates or stays the same = PCV functioning

If the glove rapidly gets sucked into the valve cover then the PCV is applying too much vacuum to the engine

Hopefully this make sense

Note: if the glove inflates until the HONK and then deflates and the cycle repeats please make a video I will fall out of my chair laughing if the cause and effect are that clear.

Good luck

Paul

2008 LR2 Si6
2010 S80 Si6

17th Sep 2021 7:03 pm

CraigMate

Member Since: 26 Oct 2020
Location: Suffolk
Posts: 62

That's a brilliant test! I'll try that next.

I've just removed the filler cap. The rhythmic 'honking' stopped and became a 'beeeeeeeeep' which is interesting

21st Sep 2021 9:37 am

SteveC

Member Since: 11 Oct 2013
Location: St Ives, Cambs
Posts: 281

2008 Freelander 2 TD4 HSE Auto Zermatt Silver

Quote:
The rhythmic 'honking' stopped and became a 'beeeeeeeeep' which is interesting

So basically, you've exchanged your goose for a Road Runner... Steve

2008 TD4 HSE Auto, Zermatt Silver

21st Sep 2021 11:18 am

p_gill

Member Since: 06 Dec 2011
Location: USA
Posts: 1333

Steve If that an upgrade????

Craig

we need a video.

We are counting on you.

Paul

21st Sep 2021 3:53 pm

CraigMate

Member Since: 26 Oct 2020
Location: Suffolk
Posts: 62

I'll try and video it in the morning.

If it was the new pcv/cam cover I just installed, how would the fault manifest itself mechanically....? Would it build pressure while driving until it caused a momentary loss of power that feels like a.misfire....?

27th Sep 2021 4:43 pm

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