Timing belt change now smoking

[Davej158]

Hi all , i have a 2002 picasso 2.0hdi which just had a water pump failure , so i decieded i might as well do a complete timing belt change as belt is on water pump as im sure your aware, so i locked the cam and i couldn't see anywhere to lock the crank once the pully was off so i maked cam and crank and did the belt change and as far as i know nothing moved but when i started the car it was not right it took a couple of turns to start it normaly starts on one turn , but it also started to blow a lot of smoke out of the exhaust again was running great before belt change so i can only think ive messed up on timing and was hoping for a bit off advice before i do anything else. Dave

[Gibbo2286]

You really need to peg the crankshaft, it's done with a hole in the flywheel and block. A hole through the block hidden behind the top of the starter motor and a hole in the flywheel need to be aligned.
I'm sure someone here will have a picture of the area and the tools needed to do it.

[Davej158]

Hi i found a picture off the crank pin hole so i pinned it and the pinned the cam and they both line up so i assume i caused so damage

[Peter.N.]

It can be done by marking the crank shaft but you must check its correct when you have finished. There is a hole in the backplate just behind and above the starter to lock the crankshaft, you can see it if you shine a bright torch up from underneath. If you fashion a piece of wire coat hanger into a starting handle shape you can feed it along the back of the starter and into the hole, push it toward the flywheel and rotate the engine by hand until it drops in. Its obviously not a tight fit but it will lock it within the timing parameters.

Peter

[myglaren]

Malcolm (Citronut) always use a bit of brake pipe - right size and if tou forget it, it just gets chewed up rather than damaging the flyweel or bellhousing.

[RichardW]

What sort of smoke? It can't be far out as the ECU checks for cam / crank synch at cranking, and it won't let it start if it's out.

[Jetjockey]

Just my two penneth worth.

When I did mine I removed the starter motor completely. It took no more than 15/20 mins and the locking pin hole is then staring you in the face, no need for specialist tools, I used a 7.9mm drill from memory and it fits a treat.
With the crank and cam pinned you can’t go wrong. In my case the belt had snapped and walloped the rockers and cam, this had caused the drive sprocket on the inlet cam to spin almost 90° so no amount of alignment was going to help. As I understand it your belt didn’t snap so once pinned there should be no problems. If your still getting problems after pinning the cam and crank then I think your first attempt may have “knocked” something.

What colour is the smoke your getting? Is it blueish (burning oil), or is it whiteish (unburnt fuel)?

[Peter.N.]

Retarded injection timing will cause smoke and difficult starting but on an Hdi its directly related to the camshaft position so could still be the problem.

Peter

[Davej158]

Hi thanks for all replies, smoke is whiteish colour, ive had the pins in correct in the cam and in the crank and they all line up but still blowing smoke when started so looking like ive knacked engine

[moizeau]

It's got a floating crank pulley that needs centralising when the belt gets put back on and the tension checked I believe (still not got round to doing mine). Not sure how this 'floating' works, but if it's set at 1 extreme then that may affect something. Just a thought, someone wiser will verify whether this is a possibility, or I'm talking cobblers.

[Peter.N.]

If the belt is out on the crankshaft the camshaft timing will still be wrong so lock the flywheel and check it again.

Peter

[Gibbo2286]

I'd advise you go with Peter's message, take the belt off and start fresh by locking all the pegs first.

[Jetjockey]

If you try refitting the belt one more time, and after pinning the camshaft and crankshaft you get the same problem, I would start worrying about the camshaft positions in relation to one another. It might also be injector problems.
I found that after experiencing a snapped cam belt, that both camshafts had taken a pounding, even though the rocker arms had all snapped as they are designed to do. This had forced the drive cog to turn on the inlet camshaft making it impossible to pin up the engine. I’m just wondering if you’ve had a smaller version of this happen after initially not pinning the crankshaft. This will throw the valve timing out possibly enough to cause the smoking but not throw up a code? All of this assumes that you have a DOHC engine of course.

I also recently saw a single overhead cam diesel that had taken a knock and it had spun two of the cam lobes round on the shaft (pressed on not cast) and this caused similar problems. It’s just a suggestion of course but I experienced both these faults after being told by the experts that it couldn’t happen (40 years in the trade they said)!

[Davej158]

Hi ive had them both pinned and its still smoking so would i be looking at a bent valve ?

[Gibbo2286]

If it was a bent valve it would be limping, running on three cylinders not just smoking.

Have you given the car a good run? If not it might be just burning off unburned fuel from the exhaust and catalyser and have a chance of coming good with an 'Italian tune up'