ENGINE
CONNECTING RODS AND PISTONS
—Remove and refit
12.17-01
Removing
1. Isolate the battery.
2. Place the car on a ramp or over a pit.
3. Remove the cylinder head. 12.29.10.
4. Remove the oil sump. 12.60.44.
5. Remove the oil pick-up strainer. 12.60.20, 2 to 4.
6. Turn the crankshaft to bring Nos. 1 and 4 connect
ing rod bolts to an accessible position.
7. Check the identifying marks on the connecting rods
and bearing caps. Mark if necessary.
8. Remove the connecting rod bolts.
9. Withdraw the bearing caps and lower half bearing
shells complete with the bolt bushes.
10. Push the connecting rods and pistons upwards and
carefully withdraw, identifying for reassembly.
11. Marry-up the top and bottom bearing shells and
caps with their respective connecting rods and
piston assemblies.
12. Repeat instructions 6 to 11 on Nos. 2 and 3 bearings.
Refitting
13. Position Nos. 1 and 4 cfankpins at B.D.C. and
lubricate them with clean engine oil.
14. Smear the pistons and cylinder bores with clean
engine oil.
15
Carefully insert the connecting rods and pistons
into the bores, ensuring that the arrow (thus A ) is
pointing to the front of the engine.
16. Ensure that the open face of the big-end bearing is
towards the non-thrust side of the cylinder bore.
17. Stagger the piston ring gaps, avoiding a gap on the
thrust side of the piston.
18. Using a piston ring compressor, gently push the
pistons into the bore.
19. Fit the upper bearing shells to the connecting rod
big-ends and pull the connecting rods onto the
crankpins.
20. **Check that the connecting rod bolt dowels are
correctly positioned.**
21. Fit the bearing shells to the bearing caps and fit to
the connecting rods, securing with new bolts and
tightening evenly (see 06-1 for correct torque).
22. Repeat instructions 13 to 21 on Nos. 2 and 3
cylinders.
23. Reverse instructions 1 to 5.
24. Replenish the sump with the correct grade of engine
oil.
U
12.17.01
Triumph Toledo Manual. Part N o. S4S168. Issue 4
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