Riddle me this.....

[srgtlord]

So my 1.6 has been sitting for a long length of time. Recently redid timing belt, yada yada, now its smoking some nice blue smoke...  Timing is dead on. The pump is timed to .98 . Could it be an injector? Rings? Im clueless as it was not smoking when I parked it a  year ago....

[ORCoaster]

You say sitting for a long length of time.  I say run some purge through it and free up the sticky valves and injectors.  I am guessing it is an injector or maybe two.  You can always check compression if you are worried it is rings.  Purge and see if it makes it all better.

[libbydiesel]

Check for air entering or leaving the pump.

[srgtlord]

Ill check for air bubbles entering the pump. I should also note the idle seems to wander up and down.

[mzak88]

Turbo seals leaking(oil)?

[ToddA1]

I'd start by running it off a jug of fresh diesel. 

I bought an old Rabbit that smoked like crazy.  Old diesel was the culprit.

-Todd

[CRSMP5]

i waited.. then more waited. no one asks the 1st questions that should be asked..

... how many miles?
how old are the rings?

ive seen diesels sit that had no issue all of a sudden have issues as the carbon gets hung up in the rings from sitting..

you say grey so id say oil..

unburnt fuel is white and smells like your spilling on the ground if it has low comp/unburnt fuel.. aka sticky injector/fuel that does not burn so well..

white with no smell is not common.. fuel.. burning antfreeze.. even turbo pissing oil into muffler smells like oil..

cloud with no smell.. id say pvc/combuston burned oil..

[srgtlord]

I will have time to look at it again tomorrow. The engine has an unverifiable amount of miles on it. Supposedly it had 100,000 since the last rebuild but who knows... I put 40,000 on the the engine  until I parked it last year. It would fire right up in the dead of winter so the compression cant be too bad. I did some reading on old diesel and supposedly the new diesel formula only lasts up to 1 year. After that point , supposedly people get all sorts of strange running issues. Ill get some diesel purge and run it through and see what happens.

[ToddA1]

Personally, I think Diesel Purge is hype.  I've used it many times, straight from the can and I never really noticed any discernible difference. 

I'd bet a 50/50 mix of diesel and ATF would do the same thing.  I'd let the pump suck it up until full, then shut it down and let sit overnight, so the mixture can do it's magic, then run the car off a jug of clean diesel and see what happens.

-Todd

[vanbcguy]

Personally, I think Diesel Purge is hype.  I've used it many times, straight from the can and I never really noticed any discernible difference. 

I'd bet a 50/50 mix of diesel and ATF would do the same thing.  I'd let the pump suck it up until full, then shut it down and let sit overnight, so the mixture can do it's magic, then run the car off a jug of clean diesel and see what happens.

-Todd

It's mostly naptha - there was someone around who figured out more or less what it is.  Naptha is a great solvent, I think they have something mixed in for lubrication purposes.  There are folks on here who have had a lot of black gunk come out of their pumps with diesel purge.  If your pump is clean though you aren't going to see much.

[ORCoaster]

Second that.  No crap, No color  Not a difference you could see or need really.  Those of us opening up pumps that have this nasty snarl in them from being left on the shelf for years, with WVO or some other unknown liquid in them see good results from the Purging.  Can we just mix up some Naptha, 2 stroke or ATF and get the same result?  Anyone with a crappy pump game for this? 

[clbanman]

MSDS here:
http://www.worldpac.com/tagged/DieselPurgeLM2005.pdf

65% or less diesel fuel.
25% or less Ethylhexyl Nitrate.  Link to paper on what that does below.
http://pics2.tdiclub.com/members/BKmetz/2EHN.pdf
10% or less petroleum distillates
1% or less 1 2 4 trimethylbenzene - a solvent.   

[srgtlord]

I had some time to play with the pump today. I wanted to make 100% sure the timing on the pump was correct,and it was not... it was at something silly like 1.35. I backed it down to .95.    I checked the timing 3 times this time before I buttoned everything back up. Still smokes blue like a chimney, not as bad as before but still not right. Would a fubared injector cause blue smoke? I should also note there was some serious pressure coming out of the blow-by valve

[92EcoDiesel Jetta]

Assuming your timing was spot on when it started well dead of winter, how did it change that much? Blue smoke is oil burning, no?

[srgtlord]

Besides the timing belt and sitting for a year, nothing. I will say one thing, Its not smoking as bad as it was when it was 180 degrees off a year ago, and believe me, that smoke was blue!