Secondary Camshaft Drive Chain Removal. Cadillac Concours 1996

For 1990-2009 cars

1. Remove the right secondary drive chain tensioner retaining bolts.
2. Remove the right secondary drive tensioner allowing it to expand as you remove it.
3. Remove the left secondary drive chain tensioner retaining bolts.
4. Remove the left secondary drive tensioner allowing it to expand as you remove it.
5. Remove the chain guide access plugs (1) located in the cylinder heads. Note the O-ring seal on each access plug.
6. Remove the camshaft position sensor retaining bolt and sensor (1).
7. Remove the camshaft sprocket retaining bolts from all four camshafts. Use an open wrench on the hex cast near the front of each camshaft to prevent engine rotation when loosening the camshaft sprocket bolts.
8. Lift the secondary chain from the sprocket teeth and slide the camshaft sprockets off of the camshafts.
9. Remove the upper bolt from the upper secondary chain guide for the right cylinder head.
10. Remove the upper bolt from the lower secondary chain guide for the left cylinder head.
11. Allow the chain to fall into the front cover area.
12. Remove the secondary drive chain from the cylinder block and store in a clean location.
13. Remove the right secondary chain guide retaining bolts and guide.
14. Remove the right secondary chain tensioner shoe retaining bolt and shoe.
15. Remove the left secondary chain guide retaining bolts and guide (1).
16. Remove the left secondary tensioner shoe retaining bolt and shoe (1).