Hi all, I haven't posted for a while , well because I traded my 56 vrs tdi in for a early mk1 vrs petrol and it was near faultless. Anyway.. I've reversed the original trade and got my vrs tdi back ( because I love a challenge ;(.. On cold start up i get blue smoke.. This was always an issue with this car and the reason I got rid, during my first ownership ..it would smoke at start up and then at any point you idled the car regardless of engine temp ( traffic lights etc ) not bellows of the stuff but enough to annoy me.. Since then the new owner replaced turbo ( thought to be the culprit ) put on new cam belt, wpump,HG! The difference the changing of the turbo has made to the issue on start up is none.. But when up to temp it is almost smoke free ( but still stinks.. Maybe just because it's a deisel )

So I took it out got it up to temp.. Got home and sat and performed a 20 minute vigil at the rear of the car ( safe distance ) no noticeable blue smoke.. Turned off .. Jumped on the ps4 for 45 mins.. Went back out temp fallen to quarter ,restarted and blue smoke on idle again.?

It's either me over thinking it.. Or it's complicated.. The cars had replacement injectors/ the dpf has been deleted.. I would hope engine wear isn't the issue on these engines.. Done about 100k mind.

My thoughts are engine mapping following Dpf delete not correct? Injector pump issue, lift pump issue? But all this has been gained from google searches .. So im at your mercy any clarification would be appreciated.. Thanks for reading

Fault codes p0130 and po135 displayed on Friday with engine light on.. Cleared light .. Didn't reappear until cold start next morning.

Worn valve guides?

Are you getting much oil through the intake pipe?  Mine has some blue smoke on start up during colder months and I think this could be down to the amount of oily vapour sucked from the crankcase breather pipe back in to the intake.

 

Something to check. IIRC when I tested with a catch can the smoke reduced a lot.

There's a decarbonising system in the UK called Revive.  You can DIY.  Might be worth a shot & if it's no good you at least get a garden sprayer out of it.

It's a weird one that's for sure.. I've ordered some glow plugs.. As occasionally the car doesn't start first turn.. Although I don't think that will cure this issue.. As if I leave the car an hour then start it will puff blue .. It's only when the engine is up to full working temp that the smoke subsides, I've read somewhere that it's very uncommon for valve guides/ stem seals to generate this problem on a Diesel engine ( unlike a petrol ) something to do with the oil unable to be sucked through into the chambers.. Over fuelling might be the problem as diesel is an oily fuel.. But I'm not convinced.. Truth is I don't know enough about what I'm trying to diagnose.. Lol maybe I could change my wiper blades that might fix it.....

Interested as mines done this since DPF delete and re-map, mines had egr removed also.

 

i'm gonna do the catch can idea and some forte treatment first before delving deaper.

Oil in the exhaust?

None up the wall or dripping.. Oil cap jiggles a merry dance when unscrewed and held loosely over the thread.. But was told by skoda "they do breath heavy" I did the forte treatment twice.. In my case it made no difference. Catch can= elephant mod?..

I have a similair issue with mine on cold starts. It is just blue smoke, so it has to be oil? I have put it down to stem seals as it clears quickly. I have had a new turbo and EGR deleted and it made no difference. It can be quite considerable some days too. If it gets worse i may consider the catch can if it is a breather issue.

Yeah

blue =oil.. but isnt diesel like oil?

I would like this problem to be valve stem seals.. wouldnt be difficult to swap them out.. but also could be injector/lift pump or both ( ive read ) wrong oil type..too much oil in sump.. im only happy it isnt constant or it could then be worn out rings/bores..

I have a similair issue with mine on cold starts. It is just blue smoke, so it has to be oil? I have put it down to stem seals as it clears quickly. I have had a new turbo and EGR deleted and it made no difference. It can be quite considerable some days too. If it gets worse i may consider the catch can if it is a breather issue.

Does it do it only on cold start up or?

If you left the car for an hour would it do it again and how long does it do it?

Mine only does it after being left overnight, and even then not always. I was under the impression that engine oil smokes blue, and Diesel smokes black? Maybe im wrong....

Plus, it doesn't appear to use any oil whatsoever and runs really well, so as I mentioned i'm not too worried.

Hmm im more annoyed than worried, im that type of character.

Have you tried finding a long, long, long decent, travelling down it with no accelerator at all, then when you accelerate at the bottom - any blue smoke in the mirror is supposed to be a valve guide oil seal problem indicator.

No, but I will.. Is that because the deceleration causes a vacuum that sucks the oil through the seals?

Yea mine does it (blue smoke) when its cold outside, say lower than 6 degrees. Never see the smoke if its 10 or more. It has done this for 40k with no loss of oil so one of those traits on the PD engine I think.

No, but I will.. Is that because the deceleration causes a vacuum that sucks the oil through the seals?

only if you have a throttle valve which you don't

This is blatently the HKS turbo mate, change the turbo to a T78 and wind the boost up. Probably need a fuel pump too, greddy pump will be sufficient.

Ratty bum bums