Black smoke

Kh44nn · 15th April 2017, 10:13

Hi,

One day a friend following me in another car said that my cdti smokes heavily when I pull away.
I have power, no problem there, starting is good and I recently did service which included breather filter and used fully synthetic oil.

Anything that is a standard maintenance fix that I'm missing because I'm afraid the engine is about to be gone. It has 173000 miles now.

I will appreciate Any feedback.

Thanks

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hortonds · 15th April 2017, 15:46

173,000 miles isn't that much for one of our diesel engines.

The black smoke is probably intercooler related and more than likely the "O" rings. Take a look at the "how to" section for help with that.

While I was changing my O rings I noticed that my intercooler hose was split so I replaced mine with a blue (so that I could easily spot any future leaks) silicon hose. Really easy job. https://goo.gl/photos/BspFdp8ckiqYBhJR9

Coups · 15th April 2017, 17:21

I'll second the intercooler O rings. Changed mine a couple of days ago, nothing really wrong with the but when I put it all back together I managed to not quite tighten up the jubilee clip allowing air in. The black smoke under acceleration was immense! Batman would have been proud.

It's an easy fix with an excellent 'how to' on the forum. Give yourself an easy 20 minutes.

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spyder · 15th April 2017, 18:46

Another for intercooler rings but also a dirty or partially stuck open EGR, will produce the same results-also under any type of acceleration.

Craig.

Quote:

Originally Posted by Kh44nn

Hi,

One day a friend following me in another car said that my cdti smokes heavily when I pull away.
I have power, no problem there, starting is good and I recently did service which included breather filter and used fully synthetic oil.

Anything that is a standard maintenance fix that I'm missing because I'm afraid the engine is about to be gone. It has 173000 miles now.

I will appreciate Any feedback.

Thanks

Sent from my iPad using Tapatalk

mh007 · 16th April 2017, 00:33

As said, either intercooler O rings or dirty/stuck EGR valve.
If it's O rings, replace the originals with Viton items.
If it's EGR valve, remove & clean.
If that doesn't work, either replace the valve or fit a blanking kit (like many have done).

Kh44nn · 16th April 2017, 09:37

Quote:

Originally Posted by mh007

As said, either intercooler O rings or dirty/stuck EGR valve.
If it's O rings, replace the originals with Viton items.
If it's EGR valve, remove & clean.
If that doesn't work, either replace the valve or fit a blanking kit (like many have done).

Hi, is it necessary to change the hose? If so which hose would I have to get because mine doesn't have turbo, so I'm confused.
Thanks

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hortonds · 16th April 2017, 14:04

Well, you only need to change the intercooler hose if it is split or leaking. The common problem though are the "O" rings that stop air being sucked in at the point where the plastic pipe goes into the intercooler. Even if the rings look okay, they possibly aren't and it's worth changing anyway.

hortonds · 16th April 2017, 14:12

Oh, and they are £3.50ish, last the life of the vehicle (unlike the originals) and are available on Ebay: http://www.ebay.co.uk/itm/BEST-SPEC-...4AAOSwyDxXhinR

Ian G · 16th April 2017, 15:25

[QUOTE=Kh44nn;2477561]Hi, is it necessary to change the hose? If so which hose would I have to get because mine doesn't have turbo, so I'm confused.
Thanks

You will find that turbo if you look hard enough

It's in there somewhere.

Cheers Ian]

mh007 · 16th April 2017, 15:44

Quote:

Originally Posted by Kh44nn

Hi, is it necessary to change the hose? If so which hose would I have to get because mine doesn't have turbo, so I'm confused.
Thanks

Sent from my iPad using Tapatalk

As said, you most definitely have a turbo (all 75 & ZT Diesels do), you just can't see it very easily as it's tucked down the back of the engine (by the bulkhead).

You don't need a new hose (unless it is split or damaged in any way), just O rings.
The most obvious sign of the O ring or rings being perished is oil around the plastic elbow nearest the intercooler.

When stood at the front of the car, look towards the N/S & follow the big Black rubber hose from the EGR valve, this will lead you to the intercooler & this is where signs of oil usually appear (but not always).

The O rings fit on the end of the plastic elbow mounted to the intercooler (the elbow is held on by one bolt).

Some recommend that the front bumper be removed to fit the O rings but it can be done with bumper on albeit a little fiddly.

15th April 2017, 10:13	#1
Kh44nn Avid contributor MG ZT Join Date: Feb 2016 Location: Luton Posts: 181 Thanks: 76 Thanked 15 Times in 13 Posts	Black smoke Hi, One day a friend following me in another car said that my cdti smokes heavily when I pull away. I have power, no problem there, starting is good and I recently did service which included breather filter and used fully synthetic oil. Anything that is a standard maintenance fix that I'm missing because I'm afraid the engine is about to be gone. It has 173000 miles now. I will appreciate Any feedback. Thanks Sent from my iPad using Tapatalk

15th April 2017, 15:46	#2
hortonds Avid contributor Rover 75 CDTI Tourer Automatic Join Date: Mar 2015 Location: Dunstable Posts: 196 Thanks: 4 Thanked 31 Times in 22 Posts	173,000 miles isn't that much for one of our diesel engines. The black smoke is probably intercooler related and more than likely the "O" rings. Take a look at the "how to" section for help with that. While I was changing my O rings I noticed that my intercooler hose was split so I replaced mine with a blue (so that I could easily spot any future leaks) silicon hose. Really easy job. https://goo.gl/photos/BspFdp8ckiqYBhJR9 __________________ 300,000 miles and back on the road Jobs done: Everything you can possibly imagine ... I have the "Triggers Broom" of cars.

16th April 2017, 14:04	#7
hortonds Avid contributor Rover 75 CDTI Tourer Automatic Join Date: Mar 2015 Location: Dunstable Posts: 196 Thanks: 4 Thanked 31 Times in 22 Posts	Well, you only need to change the intercooler hose if it is split or leaking. The common problem though are the "O" rings that stop air being sucked in at the point where the plastic pipe goes into the intercooler. Even if the rings look okay, they possibly aren't and it's worth changing anyway. __________________ 300,000 miles and back on the road Jobs done: Everything you can possibly imagine ... I have the "Triggers Broom" of cars.

16th April 2017, 14:12	#8
hortonds Avid contributor Rover 75 CDTI Tourer Automatic Join Date: Mar 2015 Location: Dunstable Posts: 196 Thanks: 4 Thanked 31 Times in 22 Posts	Oh, and they are £3.50ish, last the life of the vehicle (unlike the originals) and are available on Ebay: http://www.ebay.co.uk/itm/BEST-SPEC-...4AAOSwyDxXhinR __________________ 300,000 miles and back on the road Jobs done: Everything you can possibly imagine ... I have the "Triggers Broom" of cars.

15th April 2017, 17:21	#3
Coups Posted a thing or two Rover 75 Contemporary SE Join Date: Apr 2014 Location: Dundee Posts: 1,941 Thanks: 545 Thanked 520 Times in 402 Posts	I'll second the intercooler O rings. Changed mine a couple of days ago, nothing really wrong with the but when I put it all back together I managed to not quite tighten up the jubilee clip allowing air in. The black smoke under acceleration was immense! Batman would have been proud. It's an easy fix with an excellent 'how to' on the forum. Give yourself an easy 20 minutes. Sent from my iPhone using Tapatalk

16th April 2017, 00:33	#5
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	As said, either intercooler O rings or dirty/stuck EGR valve. If it's O rings, replace the originals with Viton items. If it's EGR valve, remove & clean. If that doesn't work, either replace the valve or fit a blanking kit (like many have done).

16th April 2017, 15:25	#9
Ian G This is my second home Small Join Date: Feb 2010 Location: Land of the Eel Posts: 6,315 Thanks: 2,328 Thanked 2,991 Times in 1,431 Posts	[QUOTE=Kh44nn;2477561]Hi, is it necessary to change the hose? If so which hose would I have to get because mine doesn't have turbo, so I'm confused. Thanks You will find that turbo if you look hard enough It's in there somewhere. Cheers Ian]