1.8 induction noise

Richard Batty · 19th April 2017, 14:58

Hello fellow enthusiats

I purchased my 1.8 Connie a year ago with 35k on the clock, it now has 46K. Ever since I have had it I have been aware of induction noise which my mechanic says is just how the car is. I have changed many things including head and associated gaskets and a new exhaust system. Nothing has changed over the year despite full services, inc air filter and the aforementioned head gasket. Also Shannon tube changed and new air box fitted. Sounds like I have a performance air filter fitted.

Is this induction noise (similar to exhaust noise but that is eliminated) on acceleration normal, am I over reactiing or is there a fix for it.
Any help appreciated.

Thank you
Richard Batty

suzublu · 19th April 2017, 15:16

Check the shannon tube, chances are it has disintegrated

Richard Batty · 19th April 2017, 16:48

Thank you Suzublu, Sorry but I have no idea what or where that is.

Richard Batty · 19th April 2017, 16:52

Ah I have googled it and now see where and what it is. This would increase induction noise I assume?

T-Cut · 19th April 2017, 17:01

The original 'Shannon' branded induction pipes reduced air noise due to their construction and design. Their current ducts are a bit diffrent from what we had: http://www.shannon.co.uk/Auto/automotive.html

Nowadays, most people fitting a replacement use a neoprene type ducting from eBay.

This HowTo will explain: http://www.the75andztclub.co.uk/foru...ad.php?t=36976

TC

Richard Batty · 12th May 2017, 13:27

New tube fitted by my usual garage. Half hour! Quieter now. Thank you all

Mason6 · 19th July 2017, 06:35

Quote:

Originally Posted by Richard Batty

Hello fellow enthusiats

I purchased my 1.8 Connie a year ago with 35k on the clock, it now has 46K. I have changed many things iincluding head and associated gaskets and a new exhaust system. Ever since I have had it I have been aware of induction noise which my mechanic says is just how the car is. Nothing has changed over the year despite full services, inc air filter and the aforementioned head gasket.
Is this induction noise (similar to exhaust noise but that is eliminated) on acceleration normal, am I over reactiing or is there a fix for it. It may be worth mentioning that previous cars where Jaguars (one with the AJ6 engine the latter with a V8) which are by nature quite quiet.
Any help appreciated.
Thank you
Richard Batty

Mine is the same Richard.
The Shannon was recently replaced and it's still the same, it's not a really loud noise but just every now and then noticeable on normal acceleration through the gears!
I see or feel no performance issues and she runs like a dream so I just assumed, being a relatively new 75 owner of only 3 years, it was simply part and parcel of the car so I've no worries with it!

neilb740 · 22nd July 2017, 22:44

Probably not this but just a thought.
Are both the mounting pegs still attached to the bottom of the airbox?
Somtimes they snap off when the air box is removed and it leaves a small hole.
I snapped one of mine off accidentaly a while back and it did make a kind of whistling/hissing noise untill i replaced the airbox.

19th April 2017, 14:58	#1
Richard Batty Regular poster Rover 75 Saloon Connie SE, Jaguar XJ6, Mini cooper Countryman (2020 Daily driver) Join Date: Mar 2016 Location: Ramsey Cambridgeshire Posts: 37 Thanks: 31 Thanked 7 Times in 5 Posts	1.8 induction noise Hello fellow enthusiats I purchased my 1.8 Connie a year ago with 35k on the clock, it now has 46K. Ever since I have had it I have been aware of induction noise which my mechanic says is just how the car is. I have changed many things including head and associated gaskets and a new exhaust system. Nothing has changed over the year despite full services, inc air filter and the aforementioned head gasket. Also Shannon tube changed and new air box fitted. Sounds like I have a performance air filter fitted. Is this induction noise (similar to exhaust noise but that is eliminated) on acceleration normal, am I over reactiing or is there a fix for it. Any help appreciated. Thank you Richard Batty Last edited by Richard Batty; 3rd March 2018 at 15:08.. Reason: updated progress

19th April 2017, 15:16	#2
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,920 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Check the shannon tube, chances are it has disintegrated

19th April 2017, 16:48	#3
Richard Batty Regular poster Rover 75 Saloon Connie SE, Jaguar XJ6, Mini cooper Countryman (2020 Daily driver) Join Date: Mar 2016 Location: Ramsey Cambridgeshire Posts: 37 Thanks: 31 Thanked 7 Times in 5 Posts	Thank you Suzublu, Sorry but I have no idea what or where that is.

19th April 2017, 16:52	#4
Richard Batty Regular poster Rover 75 Saloon Connie SE, Jaguar XJ6, Mini cooper Countryman (2020 Daily driver) Join Date: Mar 2016 Location: Ramsey Cambridgeshire Posts: 37 Thanks: 31 Thanked 7 Times in 5 Posts	Ah I have googled it and now see where and what it is. This would increase induction noise I assume?

19th April 2017, 17:01	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The original 'Shannon' branded induction pipes reduced air noise due to their construction and design. Their current ducts are a bit diffrent from what we had: http://www.shannon.co.uk/Auto/automotive.html Nowadays, most people fitting a replacement use a neoprene type ducting from eBay. This HowTo will explain: http://www.the75andztclub.co.uk/foru...ad.php?t=36976 TC

12th May 2017, 13:27	#6
Richard Batty Regular poster Rover 75 Saloon Connie SE, Jaguar XJ6, Mini cooper Countryman (2020 Daily driver) Join Date: Mar 2016 Location: Ramsey Cambridgeshire Posts: 37 Thanks: 31 Thanked 7 Times in 5 Posts	New tube fitted by my usual garage. Half hour! Quieter now. Thank you all

22nd July 2017, 22:44	#8
neilb740 I really should get out more....... MG ZT 1.8 Join Date: Oct 2011 Location: Crewe Posts: 2,298 Thanks: 110 Thanked 362 Times in 237 Posts	Probably not this but just a thought. Are both the mounting pegs still attached to the bottom of the airbox? Somtimes they snap off when the air box is removed and it leaves a small hole. I snapped one of mine off accidentaly a while back and it did make a kind of whistling/hissing noise untill i replaced the airbox.