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Across 1. Nut fits to this 5. Part of tyre that seals to the wheel rim 6. Brakes can do this when they get hot 8. Sends HT current to the desired spark plug 10. Bottom dead centre 14. Thickness of oil or resistance to flow 18. The angle of the wheel as compared to vertical 19. To readily accept moisture from the atmosphere 22. Brake pads fit in this 23. Top of the piston 25. Swivel axis inclination 26. Type of differential where pinion is set low 27. Type of glass for windscreens 28. Instrument for measuring specific gravity 30. Type of inlet or exhaust valve 34. Engine component that converts linear motion to cicular 35. Hinged cover for the engine 37. Lubricates and cools 38. Large slip angles at the rear can cause this 40. Seven hundred and twenty degrees gives four of these 41. Electronic control unit 45. Smoothly engages and disengages drive 46. Wheel with teeth 48. Tar type of paint put on car underbodies 49. Accumulator, stores electricity 51. Fuel 52. Rotating member of a centrifugal pump 53. Help slow the vehicle down 54. Illuminates 55. Rate at which energy is converted into work

Down 2. Part of tyre that is in contact with the road 3. This can happen to brake fluid if it gets hot 4. Return path for electrical current 7. Over-head camshaft 9. Temperature controlled valve for cooling system 11. Brake shoes have frictional contact with this 12. Instrument for measuring thickness 13. Series of electrical connections forming a complete path 15. Unitary body frame 16. Type of spanner 17. Electromotive force 18. Steering angle that gives self centring 20. Dashboard instrument 21. Opening to allow gases to go through 23. Converts low tension electricity to high tension 24. Top dead centre 29. Supplies power 30. Fuel 31. Mechanical force that causes rotation 32. Anti-lock braking system 33. Integral body frame 36. Type of transverse link for the suspension 39. Type of glass for side screens 42. Receives message from ECU and carries out function 43. Bolt fits to this 44. Pin that secures piston to the connecting rod 45. Pistons move in these 47. Zone that is allowed to concertina in an accident 50. Sends signal to the ECU 52. Tick over speed