Longish groaning noise from engine

Seagullsport · 8th October 2018, 18:43

My 75 CDTi 03 runs beautifully, no hesitation etc. However, lately with engine switched on and stationary or just moving off when hot a strange groaning noise comes through to the cabin from the engine, seems front to back. No symptoms at all but worrying because it is so strange. Never had it on any car before. Can't miss it. quite loud but varies in duration and time - maybe a couple of seconds or so. I know groaning is a funny term to use but I can't think of any other way to describe it. I emphasise it only occurs when stationary or just moving off, never when driving. Help.

KeithA · 8th October 2018, 18:54

With the air-conditioning on by any chance? Check your fan is working (search demist test on the forum, very common issue)

Sent from my Redmi 5 Plus using Tapatalk

Seagullsport · 10th October 2018, 17:04

Thank you for pointing me in the a?c direction. I found and realised that no fan was or has been working, yet just driven to south of france with no issues. I got the front engine cooler fan going again by 'freeing it off' - gentle persuation with screwdriver, came to life and is OK. sorry to be naïve but am I right that the fan behind the front main one is the a?c one which is solid and does not come on. The small green light comes up on the button and the a/c works perfectly well but the occasional odd groan is still there and no movement from the rear fan. Next step for me to take ? I tried to look at forum as you suggested but could not identify with my situation. I am grateful for suggestion so far.

T-Cut · 10th October 2018, 21:14

The 'fan' in question is the big radiator cooling fan situated under the bonnet behind the front grill and in front of the radiator/aircon condenser. There's no other fan in that area. The engine cooling system and the aircon system both use this same fan. It should run continuously at 'low' speed whenever the aircon is in use - hence the 'Demist Test', which verifies this is working.

Your next step is to run the Demist Test.

TC

Seagullsport · 16th October 2018, 16:51

Thanks Keith for your help. All seems to be working now with no 'groan' for about 4/5 days. Fan working as it should etc. Fingers crossed. I am grateful to you.

8th October 2018, 18:43	#1
Seagullsport Newbie Rover 75 Saloon Join Date: Jan 2008 Location: Fareham Posts: 13 Thanks: 0 Thanked 1 Time in 1 Post	Longish groaning noise from engine My 75 CDTi 03 runs beautifully, no hesitation etc. However, lately with engine switched on and stationary or just moving off when hot a strange groaning noise comes through to the cabin from the engine, seems front to back. No symptoms at all but worrying because it is so strange. Never had it on any car before. Can't miss it. quite loud but varies in duration and time - maybe a couple of seconds or so. I know groaning is a funny term to use but I can't think of any other way to describe it. I emphasise it only occurs when stationary or just moving off, never when driving. Help.

8th October 2018, 18:54	#2
KeithA Loves to post Rover 75 Conny Tourer Auto Join Date: Mar 2016 Location: Essex Posts: 347 Thanks: 75 Thanked 94 Times in 71 Posts	With the air-conditioning on by any chance? Check your fan is working (search demist test on the forum, very common issue) Sent from my Redmi 5 Plus using Tapatalk __________________ 2003 Tourer, Connoisseur Auto

10th October 2018, 17:04	#3
Seagullsport Newbie Rover 75 Saloon Join Date: Jan 2008 Location: Fareham Posts: 13 Thanks: 0 Thanked 1 Time in 1 Post	Groaning noise Thank you for pointing me in the a?c direction. I found and realised that no fan was or has been working, yet just driven to south of france with no issues. I got the front engine cooler fan going again by 'freeing it off' - gentle persuation with screwdriver, came to life and is OK. sorry to be naïve but am I right that the fan behind the front main one is the a?c one which is solid and does not come on. The small green light comes up on the button and the a/c works perfectly well but the occasional odd groan is still there and no movement from the rear fan. Next step for me to take ? I tried to look at forum as you suggested but could not identify with my situation. I am grateful for suggestion so far.

10th October 2018, 21:14	#4
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 'fan' in question is the big radiator cooling fan situated under the bonnet behind the front grill and in front of the radiator/aircon condenser. There's no other fan in that area. The engine cooling system and the aircon system both use this same fan. It should run continuously at 'low' speed whenever the aircon is in use - hence the 'Demist Test', which verifies this is working. Your next step is to run the Demist Test. TC

16th October 2018, 16:51	#5
Seagullsport Newbie Rover 75 Saloon Join Date: Jan 2008 Location: Fareham Posts: 13 Thanks: 0 Thanked 1 Time in 1 Post	Thanks Keith for your help. All seems to be working now with no 'groan' for about 4/5 days. Fan working as it should etc. Fingers crossed. I am grateful to you.