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Smoking Smoking Smoking

Post by _Mouse_ on Wed Nov 29, 2017 3:52 pm

If you can be mature enough to not make the enevetable VW emmisions jokes does anyone have any idea as to why the engine should smoke like this after a over night cold start. It continues to smoke but gets less and less until the engine is fully warmed up.

The only thing I could think of is fuel leaking through the injectors over night but I'd have thought that would have blown out in a matter of seconds.

https://youtu.be/6Q0bTrZWjwk

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Re: Smoking Smoking Smoking

Post by june_whitfield on Wed Nov 29, 2017 4:22 pm

somebody pissed down the exhaust system?

it appears to be mounted in the perfect position for such activity Smile

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Re: Smoking Smoking Smoking

Post by voodoo on Wed Nov 29, 2017 4:23 pm

Don't know about the smoke, but I do like your flashy things.

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Re: Smoking Smoking Smoking

Post by Monglord on Wed Nov 29, 2017 4:29 pm

Asking us lot to be mature? lol

Is it not normal for old diesels to smoke like that on start up?
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Re: Smoking Smoking Smoking

Post by voodoo on Wed Nov 29, 2017 4:41 pm

Leaky injectors or a leaky seal in the turbo are my best guesses.

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Re: Smoking Smoking Smoking

Post by _Mouse_ on Wed Nov 29, 2017 6:04 pm

I did wonder about piston rings. But lack the experiance to know if that sort of thing gets better when the engine is warm.

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Re: Smoking Smoking Smoking

Post by virusjohn on Wed Nov 29, 2017 8:07 pm

put a bit of brake cleaner down the inlet before you cold start and see if that clears it up Wink

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Re: Smoking Smoking Smoking

Post by _Mouse_ on Wed Nov 29, 2017 10:44 pm

Numpty wrote:
put a bit of brake cleaner down the inlet before you cold start and see if that clears it up

What witch craft is this.
Do you leave it soak over night?
In a hot engine or a cold engine?
Etc etc.

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Re: Smoking Smoking Smoking

Post by virusjohn on Thu Nov 30, 2017 3:15 am

Ask dan im sure he's done it before.

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Re: Smoking Smoking Smoking

Post by der_nanno on Thu Nov 30, 2017 7:18 am

You should see my old Volvo, which basically runs the same engine as your bike but with an added cylinder (2.4L TDI) and yes it smokes a bit for a few seconds until it gets better. I assume some of the exhaust gas is condensing on the cold exhaust for the first few moments and then slowly vapourises once it comes up to temperature. You could try pre-glowing twice and see if that changes anything.

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Re: Smoking Smoking Smoking

Post by moldwing on Thu Nov 30, 2017 11:37 am

virusjohn wrote:put a bit of brake cleaner down the inlet before you cold start and see if that clears it up Wink

Brake cleaner is the answer it'll never smoke again after about 100ml down the inlet as you crank it.

by warmed up do you mean full operating temperature or by the end of the street? if it clears fast it can be just glow plugs as they continue to glow till the engine has warmed a little. would also explane the poor starting.

also retarded injection timing will do the same.

also injectors leaking as you said but usually the smoke wont clear if thats the case.

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Re: Smoking Smoking Smoking

Post by june_whitfield on Thu Nov 30, 2017 12:32 pm

how about, with the bike on the side stand the engine is resting at an unnatural angle, compared to if it was safely confined within an automobile?

thusly, some oil has a chance to gather in areas where it normally wouldn't gather...

This is for example a know thing with some BMW bikes, which is why you usually see them parked on the centre stand.

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Re: Smoking Smoking Smoking

Post by _Mouse_ on Thu Nov 30, 2017 5:46 pm

Engine Destroyer wrote:Brake cleaner is the answer it'll never smoke again after about 100ml down the inlet as you crank it.

Especially after the turbo spins a bit to atomise it for even despersion  Wink

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Re: Smoking Smoking Smoking

Post by twofiddy on Thu Nov 30, 2017 6:14 pm

virusjohn wrote:put a bit of brake cleaner down the inlet before you cold start and see if that clears it up Wink

A bit? I think the good captain recommends about 3 cans.

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Re: Smoking Smoking Smoking

Post by moldwing on Thu Nov 30, 2017 6:54 pm

twofiddy wrote:
virusjohn wrote:put a bit of brake cleaner down the inlet before you cold start and see if that clears it up Wink

A bit? I think the good captain recommends about 3 cans.

CANS? bloody amature! I buy in 5Ls and have a squirt gun

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Re: Smoking Smoking Smoking

Post by stinkwheel on Sat Dec 02, 2017 6:44 pm

june_whitfield wrote:how about, with the bike on the side stand the engine is resting at an unnatural angle, compared to if it was safely confined within an automobile?

thusly, some oil has a chance to gather in areas where it normally wouldn't gather...

This is for example a know thing with some BMW bikes, which is why you usually see them parked on the centre stand.

I was going to suggest something similar.

If an enfield smokes like that on startup, it means it's wet-sumping and takes a while to clear the oil out of the bottom of the crankcase that's leaked there while it's been parked up. the solution to that is to either get a new piece of cork for the crank oil feed seal or park it with the engine at TDC so the crankpin is above the level of the oil.

I'm genuinely not sure how car engines circulate oil to the crank but if they're pressure fed big ends with a scavenge pump like an Enfield, perhaps leaning it over to one side is allowing oil to leak through an iffy seal into the sump.

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Re: Smoking Smoking Smoking

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