Smoke from tailpipe after Timing & PCV service??

[F250]

On my daughter's 2007 2.5T S60 FWD (166K miles), I did the complete timing system service (belt, idler, tensioner, water pump, cam seals, and two new CVVT hubs), complete PCV system replacement, new Volvo plugs, battery, new filters, drop & clean oil pan and PCV drain ports, TB cleaning, new upper & lower radiator hoses, fresh Zerex G-05 coolant, new thermostat, new serpentine belt, new oil cap seal, and I even fixed the broken switchblade key fob.  The coil boots were clean and flexible with no burn spots, but the fuel filter appeared to be ORIGINAL because it was date stamped for Dec-17 2007 on the casing!  Being new to the Volvo CVVT hub system, though, I initially made some setup mistakes and had a bit of trouble getting the timing set back up.

Once I got everything finally aligned, I buttoned up the engine covers, hoses, connectors, etc., and started it up.  The engine cranked quickly and ran well immediately.  When I ran back down the rabbit hole to find the VIDA timing statistics for each cam, the "difference" (between Target and Actual) is only -0.1 to +0.3 degrees, and that is as close to perfect as I could hope for.  After running some stop and go trips, several accelerations onto and the coming back off the interstate several times (50 miles total), there is still no CEL and it's running even smoother.

ONE QUESTION, though... With the mistakes I made along the way during the hub replacement and setup process, I must have hand turned the engine a total of 20-30 cycles.  There was zero smoking before we tore it down for all the repair work, and I never touched the turbo.  Am I to assume that the initial badly smoking blueish-gray smoke from the tailpipe (first 5-6 miles) is only a result of having hand-turned the engine so many times?  If someone can confirm or correct me on this, I would be very grateful.

Thanks ahead of time for any insights.

Pete
 

[thedrill]

Hand turning the engine several time will not cause a problem with smoking... I would check the PCV install for correct vacuum at the banjo union under the intake.

How did you clean the throttle body? spraying cleaner or just wiping with a rag? too much chemical in the intake will cause it to smoke.

[F250]

Well, I understand your comment about the the PCV banjo bolt install, but if that were the issue, wouldn't the car still be smoking at this point (and it is no longer smoking)?

Also, I've had someone else suggest that the smoking could have been from residual excess fuel in the cylinders from the no-start conditions which occurred before I got the timing corrected.  I did smell fuel under the hood after the last failed startup attempt before I got everything figured out and corrected yesterday.

My thoughts on the hand turning, though, were based on the fact that a number of those turns were made with the timing off enough to where I could not feel hardly any resistance to compression while turning the crank with my wrench, and I assumed that during those particular cranks, there was a chance for oil to get into the combustion chambers and accumulate enough to create the smoking symptom when the engine was finally fired off... until all of the oil got burned out of the chambers.

As for cleaning the TB, it was done off the engine with chemical, lots of hard rubbing with soft rags, and touching up the hard-to-reach corners, and a very soft brass bristle brush.  Pictures of the before and after are below.  Consequently, absolutely no cleaning chemical got into the engine.  I also chemically cleaned the intake manifold, but again, while it was off the engine.

[F250]

I just had a co-worker watch the tailpipe immediately at startup, and there is absolutely not even the faintest hint of a smoke puff.  Whether it was residual fuel, residual oil, or whatever... I think it is all good now.  I'll continue to watch it closely for a couple more days and keep checking the oil level just to make sure, though.

 

Thanks, drill, for chiming in!

 

Pete

[thedrill]

Yes, I think your right about the fueling issue when the timing was wrong and had a non start issue.. That would cause some smoke on start up.

I have seen people cleaning throttle bodies whilst still attached to the intake, squirting the hell out of the spray can, then wondering why the car was smoking after.

[Flukey]

Good job Mr.F250.With the way you carefully did it,I don't think you have anything to worry about.Now your all warmed up to get after the suspension

[F250]

Thanks, Flukey... I appreciate the encouragement, but the suspension thing just is NOT going to happen.  Given that this is my daughter's car, it's going to remain stock in all aspects.  She already has about $7500 tied up in this $5200 vehicle and hasn't even had it two months yet, and has only driven it for about 4 weeks.  It's going back to it's rightful owner this weekend, and we are BOTH extremely grateful for how I've been able to learn what was required to complete what was needed.

HOWEVER... since I've now invested about $300-$400 in special Volvo equipment (including VIDA-DICE 2014D), my future plans for getting a 3rd vehicle for my wife and I will almost certainly now include a Volvo.  That purchase, though, is probably another year away a this point.  For the moment, I'm really attracted to the XC60-R as the third vehicle with the intention of it being my DD.  There is plenty of time to decide, though.

BTW... Still no more smoke this morning.