Adjusting Timing Belt Tensioner on Colt Vista 4WD 20L
Timing Belt Tensioner: Adjustments
Fig. 49 Positioning camshaft sprocket for timing belt adjustment. 1500cc engine, 1600cc & 2000cc engines similar
1. On Colt models, turn steering wheel all the way to left lock, support engine with suitable jack and remove left engine mount bracket to provide
clearance to rotate crankshaft.
2. Remove timing belt upper front cover and the spark plugs.
3. Rotate crankshaft clockwise (normal direction of rotation) and inspect timing belt. If belt is satisfactory, continue rotating crankshaft until No. 1
Cylinder is at TDC on compression stroke and timing mark on camshaft sprocket is aligned with mark on belt cover or cylinder head.
4. Rotate crankshaft clockwise until mark on camshaft sprocket is 2 teeth away from mark on cover or cylinder head, Fig. 49. This causes spring
pressure of No. 2 exhaust valve to apply specific tension to tension timing belt. Do not rotate crankshaft counterclockwise, as belt tension will
be adversely affected.
5. Remove accessory drive belts and pulleys as needed, then the two adjusting port covers, inserting a screwdriver into slot on timing belt cover and
prying timing port covers off.
6. Insert 14 mm socket through adjusting port, loosen timing belt tensioner nut and bolt 1/2 - 3/4 turn. Do not loosen bolt or nut more than 3/4
turn, as fastener may fall out into cover.
7. Check to ensure that tensioner is not sticking, by inserting a screwdriver through opening on top of lower timing belt cover and pushing tensioner
toward timing belt. Release tensioner and remove screwdriver. Spring tension of the timing belt tensioner will automatically adjust the timing belt.
8. Tighten tensioner adjuster bolt, then the pivot bolt. Always tighten slotted adjuster bolt or nut first to prevent tensioner from rotating out of
position.
9. Install adjusting port covers, then install timing belt upper front cover.