Diesel knock

Spudman · 28th May 2015, 14:30

My 75 CDT has developed a diesel knock, it starts and drives ok.
I've tried Diphtane, but it sounds worse since I added it.

Stickman · 29th May 2015, 05:15

Are you sure it's not the crankshaft pulley m8

Regards
Chris

RodgerD · 29th May 2015, 09:07

Quote:

Originally Posted by Spudman

My 75 CDT has developed a diesel knock, it starts and drives ok.
I've tried Diphtane, but it sounds worse since I added it.

First thing, do a leak back test on the injectors. This will give you an idea which injector is playing up. Isolate each injector electrically, one by one, with the ignition off. Start the car and listen for the lack of diesel knock, this will tell you which injector is malfunctioning.

Spudman · 29th May 2015, 09:52

Quote:

Originally Posted by Stickman

Are you sure it's not the crankshaft pulley m8

Regards
Chris

I replaced it 2 weeks ago, it's definitely diesel knock.

EastPete · 29th May 2015, 09:56

Gus

Did you use a genuine Corteco pulley to replace the crank pulley ??There have been tales on here of knocking occurring after replacement with cheaper after-market pulleys, only cured by fitting the Corteco item.

Cheers

Pete

28th May 2015, 14:30	#1
Spudman Newbie Rover 75 CDT Conni Tourer Join Date: Sep 2012 Location: Cork Posts: 18 Thanks: 1 Thanked 0 Times in 0 Posts	Diesel knock My 75 CDT has developed a diesel knock, it starts and drives ok. I've tried Diphtane, but it sounds worse since I added it.

29th May 2015, 05:15	#2
Stickman Posted a thing or two Rover 75 saloon Join Date: Nov 2012 Location: Bordon Posts: 1,856 Thanks: 250 Thanked 403 Times in 352 Posts	Are you sure it's not the crankshaft pulley m8 Regards Chris

29th May 2015, 09:56	#5
EastPete Posted a thing or two Rover 75 CDTi Classic saloon, MGB GT, Skoda Yeti Join Date: Aug 2008 Location: Ramsey, Cambs Posts: 1,874 Thanks: 626 Thanked 635 Times in 430 Posts	Gus Did you use a genuine Corteco pulley to replace the crank pulley ??There have been tales on here of knocking occurring after replacement with cheaper after-market pulleys, only cured by fitting the Corteco item. Cheers Pete