MG 6 Cylinder Head Gasket

Fitting Your New MG 6 Cylinder Head Gasket and Bolts

1. In the event of crankshaft rotation, validate that the timing marks on the crankshaft timing gear and oil pump flange are accurately aligned.
2. Detach the bolts fastening the cylinder liner clamps and subsequently remove the clamps. Do not turn the crankshaft while the clamps are detached.
3. Thoroughly cleanse the joining surfaces of the cylinder head and the cylinder block.
4. Inspect the cylinder head for any signs of damage. Pay close attention to the gasket face of the cylinder head.
5. Scrutinize the cylinder head face for any indications of warping, particularly across the centre and diagonally from corner to corner.
6. Measure the cylinder head height and cross-verify with the referenced specifications.
7. Purge the oil and coolant passages to eliminate any debris.
8. Clean the cylinder head bolts thoroughly and examine for signs of wear or damage.
9. Cleanse the cylinder head bolts using a suitable solvent, and then wipe dry.
10. Apply a thin layer of oil to the bolt threads and the underside of the bolt heads.
11. Place a new, dry cylinder head gasket onto the cylinder block.
12. With the aid of another person, gently position the cylinder head onto the cylinder block, ensuring it correctly locates onto the dowels.
13. Carefully insert the cylinder head bolts. Ensure not to drop them. Hand-tighten the bolts into their respective places.
14. Temporarily affix timing gears to the corresponding camshafts, fit but do not fully tighten the retaining bolts and washers.
15. Follow the demonstrated sequence to progressively tighten the cylinder head bolts to a torque of 20 Nm. Utilize the timing gear to rotate the camshafts for easier access to the cylinder head bolts. Mark the position of the radial mark on each bolt head on the cylinder head with a felt tip pen. Use a suitable angle torque gauge and tighten all bolts in sequence by 180°, and then by a further 135°, ensuring radial marks are aligned.
16. In case of overtightening, loosen any bolt by 90° and realign.
17. Detach the timing gears.
18. Install the camshaft cover.
19. Mount the heat shield onto the engine, and tighten the lower bolt to 45 Nm. Refrain from fitting the upper heat shield bolt at this stage.
20. Mount the alternator’s upper bracket and secure the bolt to a torque of 22–28Nm, and the stud to 8–11Nm.
21. Tighten the nut securing the heat shield to the alternator’s upper bracket to 25Nm. Install the compressor and tighten its bolts to 22-28Nm.
22. Install the alternator, fit the lower and upper bolts, and secure them to a torque of 40–50Nm.
23. Install the camshaft drive belt’s rear upper cover.
24. Insert screws to secure the camshaft drive belt’s rear upper cover and tighten them to 8–11Nm.
25. Attach and secure the dipstick support bracket bolt to a torque of 7–10Nm.
26. Position the timing gears onto their corresponding camshafts, ensuring that drive pins are located correctly in the slots of the gears.
27. Install the bolts and washers that secure the timing gears to the camshafts.
28. Utilize a tool to hold each gear in place while tightening the bolts to a torque of 61–68Nm.
29. Use the tool to align the timing marks and install the timing gear locking tool.
30. Finally, install a new camshaft drive belt.