Across
1. Piston’s lower section
4. Palindromic vehicle (4,3)
8. Engine-incontinence inhibitor (3,4)
9. Enlarged a cylinder’s diameter
10. Roof with removable, full-width panel
11. Carburetor valve type
13. Valvetrain component
15. Auto-repair facility
18. Briefly, twist-off cooling-system component (3,3)
20. Item found under distributor cap
23. Quick-start fluids’ volatile ingredient
24. Nationality of Lamborghini cars
25. Item in transmission’s torque converter
26. Footwear found in brake drums
Down
1. Technicians’ conversation, you might say (4,4)
2. Serpentine belt ____ pulley
3. Beginner-driver description, usually
4. Rejuvenate a brake shoe
5. Word following speedometer or battery
6. Toyota’s competitor for Honda Civic
7. Car’s suspension comfort
12. Friction reducers in engine
14. Component in turn-signal system
16. Passenger-protection devices
17. Lengthwise vane in driveshaft’s sliding section
19. Competitor of Matchbox and Dinky
21. Wiper-blade brand since 1917
22. Timing-chain alternative