D5 smoking / Injector tests

[aston482uk]

Got an 05 S60 with a euro 3 D5 which smokes pretty badly. I think it's diesel rather than oil being burned (or not burned). It's also pretty rattly from the top of the engine, I'm fairly confident it's not valves, but could be wrong

I've run the injector tests in Vida and the figures are below. The compression figures might not be correct, I can't run any external power to the dice while cranking.

Compression
1: 179, Test 2: 175rpm
2: 179, Test 2: 175rpm
3: 180, Test 2: 173rpm
4: 181, Test 2: 175rpm
5: 169, Test 2: 164rpm

Combustion:
1: 694, Test 2: 704, Test 3: 706rpm
2: 752, Test 2: 762, Test 3: 748
3: 662, Test 2: 680, Test 3: 682
4: 774, Test 2: 802, Test 3: 762
5: 772, Test 2: 794, Test 3: 766

Fuel correction:
1: 7.01, Test 2: 7.33, Test 3: 7.55 mm^3
2: 16.11, Test 2: 11.64, Test 3: 9.32
3: 5.85, Test 2: 5.95, Test 3: 5.9
4: 0, Test 2: 0, Test 3: 0
5: 29.71, Test 2: 30.82, Test 3: 30.97

Can anyone suggest what's wrong here or what else to try?
Thanks

[reggit]

That fuel correction test doesn’t work properly on the E3 D5 engine, so ignore it.

What colour is the smoke? If black, suspect overfuelling. Likely cause is intake air leak, blown intercooler - common, look for oil stains on radiator pack. Split hose somewhere.

How many miles on the engine?

[aston482uk]

The smoke is white/grey, can't really see much blue in it.
The car has 120k, can't really give you any more history other than that I got it as a non runner (yeah, risky move but hey it's fun), and when I got it going I found out it'd blown its core plug (lol)

[reggit]

White is usually water in the exhaust. Is the coolant level correct and staying the same? Poss head gasket, or if you’ve just got it going could just be excess condensation drying in the exhaust?

[aston482uk]

Haven't really run the car long enough to notice coolant loss.
Don't think it's condensation as I had it reach operating temp one day, then once it cooled down and I started it again (only a couple of hours later) it was just as bad as before. Also there's an EGR leak (didn't wanna wait for a replacement gasket just while i'm testing) and I can see the smoke coming out of there. There's no way there's *that* much condensation in only the manifold.

So you think it's moisture rather than diesel not burning properly?

I've no problem with doing the head gasket if that's the most likely option, just didn't want to pull it off to find it's a bad injector or something.

[oilit]

Do you know why it blew a core plug - and which end (near which cylinders) of the engine was the core plug gone on ?

I thought white smoke in a diesel was unburnt diesel or water ?

Cylinder 5 is obviously lower than the other 4 for compression

I would check easy things like fuel filter first, make sure the timing belt hasn't been replaced incorrectly and thus double chk timing.

After that maybe a leak off test and pressure test the intercooler and hoses

Just some random tests I would do before pulling the engine apart - basically I would only do that if I knew what the problem was.

[aston482uk]

The core plug was the one behind the flywheel. Blew out most likely due to clogged PCV system

Timing is definitely ok. I'll probably try a leak back test but I suppose head gasket is most likely

[Longhouse21]

Originally Posted by oilit

?

I thought white smoke in a diesel was unburnt diesel or water ?

Cylinder 5 is obviously lower than the other 4 for compression

I would check easy things like fuel filter first, make sure the timing belt hasn't been replaced incorrectly and thus double chk timing.

After that maybe a leak off test and pressure test the intercooler and hoses

Just some random tests I would do before pulling the engine apart - basically I would only do that if I knew what the problem was.

White smoke can often be an indicator of unburnt diesel so a leak back test is important. As said above, the compression in 5 is lower than the others which may indicate a head gasket fault, but could equally indicate valves or rings (or I suppose a dodgy injector seal?) and may give rise to poor combustion and unburnt diesel
Diesel engine problems & smoke indications
https://www.uniteddiesel.co.uk/fault-finding-help
https://www.pfjones.co.uk/troublesho...el-engine.html

[LukasCZE]

Hey. I have the s40 diesel mk2 and had a black smoke issue. I had 2 cracks in the pipes going from the intercooler to the air intake manifold. Not sure if this is ur issue but check it out. What colour smoke is it an are you experiencing slight loss of power?