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2009 1.6 75HDI Smoke on starup
#1
Hello to all forum members!



Berlingo M59 2009 1.6 75HDI
203.000 miles on the clock.

I own the van since 2009.

Lately, when starting a colg engine (after parking of 5-6 hours or more) white smoke came out from the exhaust pipe.
It has a strong smell of unburned diesel fuel.
The smoke stops after about a 30 second.

Its important to note, when cold weather (below 3-4 °C) there is almost no smoke, but there are a lot of smoke when 10-20 °C.

When startind a warm engine - no smoke at all.

Beyond that, the wan ran well, MPG OK,
no smoke at any other driving condition.


What could it be? Injectors leak?


Thakns.
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#2
Likely to be injectors but could be poor compression due to worn bores or rings, or valves not fully seating.
Easiest thing is pull the injectors and compression test it. if that's ok get the injectors tested. If they are Siemens, they are known for problems.
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#3
At that kind of mileage an injector leak off test would be a good place to start.

When were the glow plugs changed last? - remember they may not be used to aid starting but are used to help with emissions on a cold engine.

As Col says above could be down on compression.

Have you tried some injector cleaner?
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#4
Thank you Col and polar,

(19-02-2016, 08:39 AM)Col Wrote:  If they are Siemens, they are known for problems.

They are Bosch.


(19-02-2016, 09:05 AM)polar Wrote:  When were the glow plugs changed last? - remember they may not be used to aid starting but are used to help with emissions on a cold engine.

As Col says above could be down on compression.

Have you tried some injector cleaner?

The glow plugs have not been changed ever...since there was no reason to change them.

I'm pretty sure that this engine has a good compression because a low oil consumpition ( 0.5 liter for 5000 miles) and proper performance.


I don't use injector cleaner or any other fuel additives at the last 60.000-70.000 miles.
Is it okay to go back to use them?
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#5
(19-02-2016, 10:45 PM)Buki Wrote:  I'm pretty sure that this engine has a good compression because a low oil consumpition ( 0.5 liter for 5000 miles) and proper performance.
Poorly seating valves can give low compression with low oil consumption.
You need to eliminate things by testing in order to get to the root cause
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#6
My vote would be injectors, sounds like it is overfueling, so the cold weather makes this ok.
I have a Citroen C3 with 317000 miles, & this does not smoke at all. It had injectors at around 100K
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#7
Hello Buki welcome to the forum the best place to start is with the injector's
                                     Smile  It's too orangey for crow's It's just for me and my dog  Smile

                                                        Heart Heart Love a lot trust a few  Dodgy
 
                                                        

                                        
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#8
What fuel do you use?

my old Isuzu trooper got like this. very smoky on start up and poor first start. changed heater plugs. still not much different. I was told it would probably be injector leak, the car is 22 years old and has lots of miles on it.  then I spoke to an old and very wise mechanic. he asked what fuel i use, so i changed from using supermarket fuel to bp/shell and it is a totally different vehicle. never used supermarket fuel again. and this was some years back. still got the car and still spot on. 
the old mechanic told me that alot of the problems these days with modern engines is............cheap supermarket fuel.
[+] 1 user says Thank You to dieselj for this post
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#9
Don't want to sound like the grandma egg sucky thing, but I'm aiming this at the least techy people on here who may not know. So please don't take offence if you do know this.

OK. When trying to identify diesel problems using smoke, it's a good idea to know what the smoke indicates.
Diesels rely on compression to raise the cylinder temp high enough so when diesel is injected into the cylinder, it will spontainiously ignite as the air temp will be above diesels flash point.
It also follows that the diesel has to be injected as a fine mist so that it fully mixes with the oxygen content of the air and completely burns all of the fuel injected.



Blueish smoke is oil being burned- Could be worn valve stem seals or worn rings or bores

Black smoke is incomplete combustion- Usually not enough air, or too much fuel, or fuel not atomising properly. Can be caused by blocked air filter, faulty injector (hosing)  or full throttle in loaded vehicle uphill where more fuel is being supplied than can be burnt  (Mainly old mechanical systems suffer)

White smoke is unburnt diesel- Fuel is being injected but not burnt and goes out the exhaust in the form of a white, dieselly smelling vapour. Can be caused by low compression which will not give enough cylinder temp to ignite fuel, fauly glow plugs on older indirect engines, or faulty injectors not atomising the the fuel properly (hosing)

As I said earlier, it is probably an injector issue, but as you have to take them out to test them anyway, it makes sense to me to put a compression tester in and make sure all is OK. It only takes a few minutes to do and eliminates any compression related problems.

[Image: injector.jpg]
[+] 1 user says Thank You to Col for this post
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#10
(21-02-2016, 11:26 AM)Col Wrote:  Don't want to sound like the grandma egg sucky thing, but I'm aiming this at the least techy people on here who may not know. So please don't take offence if you do know this.

Thank you very much for the comprehensive explanation.
Even tough I know all these things, it was nice to read.

I am happy to join the forum!
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