Horribly smoky 300tdi - Defender Source
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  #1  
Old April 4th, 2015, 12:07 PM
moogling
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matt
110/1996
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Horribly smoky 300tdi

Hullo All!

I've just put a 300tdi into my 1986 110.

The engine has been sat for 3 years and is of unknown heritage.

I've struggled to get it to run and have since done the timing and fitted a known good injector pump.

When it finally ran it was VERY SMOKY.

I TOOK THE HEAD OFF and re-lapped in valves + replaced stem seals.

Fitted the new head gasket and went for a start but unfrotunatly it still smokes terribly.

HERE IS A VIDEO running without manifold - https://youtu.be/hviUHSDclHo

HERE IS A VIDEO running with manifold - https://youtu.be/AJtOAUhL24A

Any suggestions what I should do!?!?
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  #2  
Old April 4th, 2015, 12:16 PM
moogling
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Do you mean the usual puff of smoke when you start it? It's certainly not that unfortunately. there is no throttle response, starting from stone cold is awful and the smoke doesn't go away when running
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  #3  
Old April 4th, 2015, 12:17 PM
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John B.
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You need to go and drive it. Make sure it has good fuel. It it not abnormal to be smoky until run hard to clean it up. If it is still really smoky after a run the. Let us know.
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  #4  
Old April 4th, 2015, 12:42 PM
moogling
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matt
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Cheers - do you really think it's worth plumbing it all up to take it out for a drive with such poor throttle response? it just sounds awful to me!
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  #5  
Old April 4th, 2015, 01:08 PM
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Sure you hooked up your fuel system in the right way? This is what you get if the return and feed are switched around
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Old April 4th, 2015, 01:52 PM
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I had the very same issues on my 2.5 NAD. If you have been cranking in over to get it started, you might have raw fuel in your exhaust system. I ran mine for about a mile down the road smoking like a pig. Finally the fuel burned off and throttle response came back.
You might just help keep the bug population down....good luck.
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  #7  
Old April 5th, 2015, 04:24 AM
moogling
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matt
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Thanks for the responses all.

Checked the fuel direction and it is correct so current plan is to swap injectors from my daily vehicle , bleed fresh fuel right through and then get it ready for a good drive!
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Old April 5th, 2015, 05:29 AM
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With no turbo, is it not pumping far too much diesel in for the available air change?
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  #9  
Old April 5th, 2015, 09:05 AM
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Robert Davis
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Exactly, James... with no turbo and no inlet manifold pressure, the engine will smoke like 10 diesels.
As everyone else mentions, cranking the engine dumps fuel into the cylinders and exhaust (when hooked up), thus all the smoking.

The next suggestion was to have your injectors pop tested and get a compression check which is easily done with the injectors out, if you have the right tools.
If you have a leaking injector, it will smoke smoke smoke!
Swapping injectors with a daily driver would work, but if there are issues, they will transfer from one engine to the other.
Has anyone ever run bio-diesel or WVO in it?
The white smoke you see before the engine is completely warmed up, can always be the result of some veg in the tank.

Good Luck!
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  #10  
Old April 5th, 2015, 10:04 AM
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not really. the boost compensator will not add any extra fuel so it should run fine without the turbo:

https://www.youtube.com/lZCUFp8t9zc

Quote:
Originally Posted by rdavisinva View Post
Exactly, James... with no turbo and no inlet manifold pressure, the engine will smoke like 10 diesels.
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  #11  
Old April 5th, 2015, 02:55 PM
clivecottrell1943
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Interestingly it seems to be smoking on cylinders one and two more than three and four. Does this not give a clue. Maybe more fuel being injected into these cylinders than the other two? Time for more investigation. Best of luck with the conundrum.
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Old April 5th, 2015, 04:07 PM
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Chris
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Nothing that sits three years unused is going to be completely trouble free when you start running it.
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  #13  
Old April 5th, 2015, 04:37 PM
piper109
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Check the injector timing. It looks retarded to me.
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  #14  
Old April 5th, 2015, 04:47 PM
clivecottrell1943
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Clive Cottrell
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Why not. I cannot see it should make that much difference. After all, especially taking into account all the work you have done to make this engine serviceable. Of course the other factor is that there can be different colours of smoke made by a diesel. Injection timing for example being important. It seems that you maybe suggesting it is smoking excessively because of the long period of inactivity? Blue smoke on a petrol engine invariably means engine oil is being burnt, could this be a contributing factor in this case?? Sorry I can't be more helpful. CC
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  #15  
Old April 5th, 2015, 04:53 PM
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Just go a drive it. And then see if something is wrong. You need to get load on the engine and the cylinder temperatures up to clean things out.
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  #16  
Old April 5th, 2015, 05:06 PM
piper109
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If you have a 300tdi, retard the injector pump a little. Tell me what colour the smoke is when it starts up :-)
Having been there and done that, with a slightly late injector timing, when the engine is cold it smokes blue grey somewhat profusely and smokes on the overrun going down hill too. When engine has warmed up, much less.
He says he has just done the timing. I would advance it a little and try again.
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  #17  
Old April 6th, 2015, 09:59 AM
moogling
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matt
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Swapped in injectors from the daily driver - no change

Plumbed it all up and gave it a good run till hot.

Unfortunately i cannot just drive it. it's a long long way from road legal and being in uk suburbs there is nowhere to go!


The (new) lift pump has now failed.

I'm wondering if I fitted it under the cam instead, any idea what sort of issues that might cause???

I've got a compression tester on the way too.
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