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flywheel is dowled pined to crankshaft so it goes in correct position.so cant get that wrong unless someone has removed dowel pin.
timing mark on front pulley in middle of pulley aligns up with mark in front timing cover, and cam should have dot or "B" (depending on year) that aligns up with outer edge of head when TDC No1 firing. in this position the injector pump if common rail has dot on gear that aligns to casting mark on pump near where shaft for gear comes out of pump (can only see when pump is removed) white texta mark the tooth with the dot and fit pump while all other marks previuosly mentioned are still in correct position, in side of bell housing there should be an inspection nut or plastic bolted tear drop cover to remove close to chassis rail look inside with mirror and torch and white texta marked tooth should be in middle of this inspection hole to confirm its not a tooth out.
. The timing pointer must be aligned with the white mark on the flywheel; the cam pulley must be set so the small dot or the word UP is vertical and the marks on the edges of the pulley are aligned with the surface of the head
you have to line up all 3 of your tjmjng marks.Is your engine single head or double overhead cams The marks have to line up.Firstyou have to remove the belt.Then remove harmonic balancer to get to the timing gear sprocket.It has a blade attached to it with 3 fins in between the fins is a little dip that is the crankshaft position.align that dip with the mark below the crankshaft position sensor.then you have to do the same with your camshafts.Then replace the belt and spin the the crankshaft clockwise to the aligment mark they should all stop on their marks.
broken belts on these engine can cause engine damage...the are 2 belts on the ohc engine,
align the timing mark on the bell housing with the centre of the 3 marks on flywheel ( no numbers etc) the others are ign timing marks..each camshaft sprocket has a mark on it and on the cover above it make sure these align also.
Check the position of the timing marks. The timing pointer mustbe perfectly aligned with the TDC (white mark) on the flywheel orflex-plate; the camshaft pulley must be aligned so that the word UP isat the top of the pulley and the marks on the edge of the pulley arealigned with the surfaces of the head. Additionally, the face of thefront timing balancer pulley has a mark which must be aligned with thenotch on the oil pump body. This pulley is the one to the left crankwhen viewed from the pulley end.
Align timing pointer on transmission bellhousing with white T.D.C. mark on flexplate or flywheel, make sure up marks on each camshaft pulley at top and align marks on each pulley aligned with the edges of the cyl. head.
If your caddy is the 1.9 diesel
The mark you are looking for is on the flywheel. Remove the plastic
plug in top of the bell housing to reveal a small arrow. Rotate engine
until the flywheel TDC mark lines up with this arrow