Across 1. New cars’ pre-set option groupings 5. Workbench-mounted grabber 9. Ticket-by-mail device, ____ radar 10. Combination-wrench section (4,3) 11. Alignment-bay adjustment, perhaps (4,3) 12. Write off a ride, slangily 13. Adjust ignition timing, in a way 15. Leakage of gas past piston rings 18. Radiator-hose adjunct 20. See 13-Across clue 23. Fine paint cracks, in body-shop lingo 24. Piston portions that separate and support rings 25. Wheels’ outer sections 26. Carcinogen once found in brake linings

Down
1. Material inside spin-on oil filter
2. Antifreeze and water mixture
3. Windshield pillar, in other words (1,4)
4. GM’s alloy, twin-cam, 4-cylinder engine
6. Tig welding uses tungsten ____ gas
7. Longitudinal crankshaft movement (3,4)
8. "American Chopper" family name
13. Competition vehicle for palindrome lovers (4,3)
14. Service-bay task
16. Fastener shaped like Mouseketeer’s hat (4,3)
17. Dashboard info sources
19. Anti-theft-system noisemaker
21. Item replaced during new-tire installation
22. Slang for series of tight turns