1.9TD (AAZ) Blue smoke

[HarryMann]

Blue smoke at constant speed, not a big cloud, but more than I'd want to see from a vehicle in front. 20W-50 Dino oil (to keep oil pressure up when hot,  so engine a bit worn somewhere, new big-ends and pump helped a bit). Goes OK.

Turbo replaced with secondhand unit having pretty good bearings and seals.

Is this definitely ring/bore wear or could it be valve-stem seals (which I thought would normally only do this on the overrun) ?
Poor breathing?

Appreciate any comments.

[wyldman]

Usually it's a sign of ring wear.While a missing or real bad valve stem seal will cause smoke,it's not common,as they are a positive retention type seal,which rarely fails.There is also no vacuum (unlike a gasser) in the intake ports to suck oil out of the guides,so they don't usually cause a problem.

I've seen a lot of 1.9L's with stuck rings,and oil consumption is horrible.

I'd start with checking the amount of blowby,and doing a compression test.Rings can be done in the car,if the cylinders are decent enough,and do not require boring.

[HarryMann]

Thanks, that's a helpful and complete answer.

Now, funny you should mention a complete valve-stem seal missing - upon doing the pump and big-ends, I found what I'm sure is a bit of oil seal rubber and what looks like a chunk of a collet, in the pump's strainer.

Yes, it does have blowby, not awful, but I'd say it is 'breathing a bit'

So head off, check the valve-seals, do them? and ring it at the same time?
Or another lump, which is a possibility, though as always, an unknown!

It's the state of that exhaust manifold (1.6 JX, 50 degree installation type) that worries me, that's going to be multiple broken studs/ bolts. The turbo I've just changed was about as knacked and rusted as you'd ever want to see,  I rarely chcuk anything in the bin, but apart from the wastegate solenoid, in it went !

[wyldman]

I'd open up what you have,and if the bores are good,then rering it,and redo the head as neccessary.

The manifold studs\nuts are no problem while it's out.Flame wrench will make easy work of it,then just wind out what's left from the head.New bits are cheap.

[HarryMann]

Thanks again..

[hillfolk'r]

sometimes if the rings are stuck from carbon,,,a simple water injectionsetup canremove the carbon,,,i used an old washer bottle hooked upin the air intake tube,witha smallcarb jet in the endof the hose,but it sounds like your engine is tired,,,,water inj. lowers egt+more power too,had a button on the shifter toactivate it,,,i had all the parts laying around (a2 gallon washer bottle,hose,carb jets),,so the major expense was actually filling the washer bottle,,,,,,,,kinda like filling the gas tank of a honda doubles the resale value,ya know???