Across
1. Battery-diagnosis procedure (4,4)
5. Bedrock stone-car driver
9. Brake booster synonym
10. Seat-belt part, _____ reel
11. Engine incontinence (3,4)
12. Pre-EFI engine’s cold-start device
13. Mineral deposits in radiator
15. Chevy van for Houston footballer
20. Camshaft protrusions
22. Replacement exhaust-system type (3,4)
24. Flow of electricity through circuit
25. Item absent in drum-brake system
26. Battery-cleaning mix, baking ____ and water
27. Certain motorbikes

Down
1. Name on lease agreement
2. Lacquer-paint adjective
3. Accident outside a steakhouse, perhaps (1,4)
4. Treadless racing tires
6. Relationship between gears
7. Franchised new-vehicle vendor
8. Hot-rod slang for two-barrel carbs
14. See 1-Down clue
16. Alignment adjustment, in recent years (4,3)
17. Engine cores
18. GM’s ubiquitous twin-cam engine
19. Ladies’ garments and piston sections
21. Enlarged a cylinder’s diameter
23. Supercharger’s exhaust-driven counterpart