MG ZT CDTi weird noise

Steven211 · 3rd August 2020, 21:16

Hi all, I've noticed recently that my ZT CDTi has started making a weird whine noise, I can only describe it as a squeaky NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- haha. It will do it when I have driven the car, turned it off then turned it back on, it lasts maybe 3 seconds. Also it will do it intermittently when I pull away from roundabouts or put the car under load on inclines. But usually does it when starting car. I have replaced the in tank pump as I originally thought it was that, and tonight I have replaced the under bonnet fuel pump. I have heard it once since when parking up.

trikey · 3rd August 2020, 21:33

Could be the intercooler o rings failing.

Steven211 · 4th August 2020, 07:01

Quote:

Originally Posted by trikey

Could be the intercooler o rings failing.

I've changed them recently, it has no boost leaks or smoke. I read there is a known issue with fuel pressure regulators on hp pumps but there is no video of the noise.

Steven211 · 13th August 2020, 19:45

Still hearing the noise occasionally, I hear it more when its hot.

SD1too · 14th August 2020, 08:20

You say that the noise occurs when the engine is under load. Slipping drive belts cause anything from a squeak to a shrill scream.

Simon

Steven211 · 14th August 2020, 09:43

Quote:

Originally Posted by SD1too

You say that the noise occurs when the engine is under load. Slipping drive belts cause anything from a squeak to a shrill scream.

Simon

Its definitely not a belt type of sound. The more I concentrate on the noise the more i notice its more on overrun when i change gear. Sometimes it will do it when i restart the car after being turned off. I keep trying to record it but the noise is too intermittent.

3rd August 2020, 21:16	#1
Steven211 Regular poster VW Golf TDI yawn Join Date: Jul 2019 Location: Worcester Posts: 83 Thanks: 21 Thanked 19 Times in 12 Posts	MG ZT CDTi weird noise Hi all, I've noticed recently that my ZT CDTi has started making a weird whine noise, I can only describe it as a squeaky NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- haha. It will do it when I have driven the car, turned it off then turned it back on, it lasts maybe 3 seconds. Also it will do it intermittently when I pull away from roundabouts or put the car under load on inclines. But usually does it when starting car. I have replaced the in tank pump as I originally thought it was that, and tonight I have replaced the under bonnet fuel pump. I have heard it once since when parking up.

3rd August 2020, 21:33	#2
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,766 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Could be the intercooler o rings failing. __________________ Lest we forget..

14th August 2020, 08:20	#5
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,368 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	You say that the noise occurs when the engine is under load. Slipping drive belts cause anything from a squeak to a shrill scream. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

13th August 2020, 19:45	#4
Steven211 Regular poster VW Golf TDI yawn Join Date: Jul 2019 Location: Worcester Posts: 83 Thanks: 21 Thanked 19 Times in 12 Posts	Still hearing the noise occasionally, I hear it more when its hot.