Cdti diesel leak any common areas to start looking?

MGMarc · 9th January 2016, 12:15

My Tourer has developed a smallish diesel leak which is evident from a rainbow coloured patch trail coming from my driveway and going down the road

Are there any areas to start looking?

The car smells fuelly from the front end although looking under the bonnet doesn't show any obvious faults

mikesmith2 · 9th January 2016, 14:08

The fuel cooler behind the rear O/S wheel can be a cause.

Snagger · 9th January 2016, 14:17

Quote:

Originally Posted by mikesmith2

The fuel cooler behind the rear O/S wheel can be a cause.

Yes this would be my first port of call too.Check fuel filter / under bonnet fuel pump for movement,and their respective pipework.

Snagger.

klarzy · 9th January 2016, 14:33

Quote:

Originally Posted by mikesmith2

The fuel cooler behind the rear O/S wheel can be a cause.

Especially the flow control valve... replace it with a land rover one

MGMarc · 9th January 2016, 15:43

The leak seems to be from cold and is only leaving rainbows in the damp/wet tarmac underneath the engine

No sign of patches underneath in the dry

klarzy · 9th January 2016, 15:47

Quote:

Originally Posted by MGMarc

The leak seems to be from cold and is only leaving rainbows in the damp/wet tarmac underneath the engine

No sign of patches underneath in the dry

Could be a few drips of power steering fluid or coolant...

If you can put the car somewhere flat and dry, put a sheet of card underneath where you think its coming from to see if you can catch any "Pure" drips to see what fluid it is... it should also give you an exact location to follow back to the source...

The other obvious one is... is it condense from the air conditioning, there are tubes towards the rear of the engine that drop the moisture that the AC pulls out of the air...

Mike Noc · 9th January 2016, 15:52

Remove the acoustic panel and check for any leaking diesel from the common rail HP pipe unions going to the injectors and the spill return lines.

Also check the pipe connections on the low pressure side as the O rings can fail.

DMGRS · 9th January 2016, 15:58

High pressure pump (driver's side, front of engine)
Under bonnet pump (next to battery box)
Fuel filter housing and related pipework (near under bonnet pump)

Could also be a snapped T piece from the leak offs at each injector.

MGMarc · 19th January 2016, 20:43

Took the car to a local garage today and we were unable to find the source of the leak

We were able to ascertain it is a diesel leak and that the evidence suggests its coming from the high pressure pump side of the engine

The undertray foam was saturated in diesel but no leaks emerged after 30 mins of idling can only assume it only leaks under certain conditions or temperatures

klarzy · 19th January 2016, 20:50

Quote:

Originally Posted by MGMarc

Took the car to a local garage today and we were unable to find the source of the leak

We were able to ascertain it is a diesel leak and that the evidence suggests its coming from the high pressure pump side of the engine

The undertray foam was saturated in diesel but no leaks emerged after 30 mins of idling can only assume it only leaks under certain conditions or temperatures

Sprinkle some talc on the area and then take the car for a blast (under load)... any leak should jeave a trail....

9th January 2016, 12:15	#1
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	Cdti diesel leak any common areas to start looking? My Tourer has developed a smallish diesel leak which is evident from a rainbow coloured patch trail coming from my driveway and going down the road Are there any areas to start looking? The car smells fuelly from the front end although looking under the bonnet doesn't show any obvious faults

9th January 2016, 15:58	#8
DMGRS Discount MG Rover Spares Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011 Location: Hythe, Southampton Posts: 11,354 Thanks: 456 Thanked 3,377 Times in 2,027 Posts	High pressure pump (driver's side, front of engine) Under bonnet pump (next to battery box) Fuel filter housing and related pipework (near under bonnet pump) Could also be a snapped T piece from the leak offs at each injector. __________________ Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off

9th January 2016, 14:08	#2
mikesmith2 Loves to post None Join Date: Feb 2012 Location: Reading Posts: 466 Thanks: 1 Thanked 15 Times in 15 Posts	The fuel cooler behind the rear O/S wheel can be a cause.

9th January 2016, 15:43	#5
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	The leak seems to be from cold and is only leaving rainbows in the damp/wet tarmac underneath the engine No sign of patches underneath in the dry

9th January 2016, 15:52	#7
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,578 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Remove the acoustic panel and check for any leaking diesel from the common rail HP pipe unions going to the injectors and the spill return lines. Also check the pipe connections on the low pressure side as the O rings can fail.

19th January 2016, 20:43	#9
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	Took the car to a local garage today and we were unable to find the source of the leak We were able to ascertain it is a diesel leak and that the evidence suggests its coming from the high pressure pump side of the engine The undertray foam was saturated in diesel but no leaks emerged after 30 mins of idling can only assume it only leaks under certain conditions or temperatures