Engine Mechanical
19 guides in this section.
Engine oil change (Oil & Filter)
NB oil-and-filter service with concrete drain/fill points, practical fill quantities, and leak-proof final checks.
- Difficulty:
- Beginner
- Time:
- 45-60 min
Spark plug replacement
NB spark-plug service with concrete gap/torque guidance, aluminum-head thread protection steps, and post-install misfire checks.
- Difficulty:
- Beginner
- Time:
- 45-75 min
Timing belt replacement (1.6L and 1.8L)
NB-focused timing belt replacement workflow with emphasis on crank/cam timing alignment, crank pulley removal safety, and common no-start mistakes after reassembly.
- Difficulty:
- Advanced
- Time:
- 4-7 hours
Valve cover gasket replacement
NB-focused cam/valve cover gasket replacement procedure, including gasket quality guidance and common optional while-you're-there checks.
- Difficulty:
- Intermediate
- Time:
- 1-2 hours
Engine compression test (periodic check)
Repeatable NB compression-test workflow with warm-engine prep, WOT crank method, cylinder-balance interpretation, and wet-test escalation logic.
- Difficulty:
- Intermediate
- Time:
- 45-90 min
Accessory drive belt service (inspect / adjust / replace)
How to inspect, tension, and replace NB accessory drive belts (alternator/water-pump, power-steering, and A/C where fitted) with conservative, verification-first checks.
- Difficulty:
- Intermediate
- Time:
- 60-120 min
Water pump replacement
NB1/NB2 water pump replacement workflow, usually performed together with timing belt service, with conservative checks and explicit uncertainty where public specs conflict.
- Difficulty:
- Advanced
- Time:
- 4-6 hours
Timing belt tensioner & idler pulley replacement
NB1/NB2 timing-belt tensioner and idler replacement workflow, typically completed during timing-belt/water-pump service, with manual-first torque verification.
- Difficulty:
- Advanced
- Time:
- 3-5 hours
Crank pulley / harmonic balancer inspection & replacement
Inspection-first workflow for diagnosing NB crank pulley/harmonic balancer issues, with conservative replacement guidance and manual-first torque verification.
- Difficulty:
- Advanced
- Time:
- 2-4 hours
PCV valve replacement
NB1/NB2 PCV valve inspection and replacement workflow with hose-condition checks and conservative post-service verification.
- Difficulty:
- Intermediate
- Time:
- 30-60 min
Vacuum hose & breather hose inspection/refresh
NB1/NB2 vacuum and breather hose inspection/refresh workflow focused on leak prevention, routing verification, and conservative post-service checks.
- Difficulty:
- Intermediate
- Time:
- 60-120 min
Engine mount inspection & replacement
Inspection-first process for diagnosing and replacing worn NB engine mounts, with manual-first torque verification and post-repair checks.
- Difficulty:
- Advanced
- Time:
- 2-4 hours
Oil leak inspection (common NB leak points)
NB1/NB2 oil-leak inspection workflow focused on finding true leak origin before replacing seals, with common NB patterns and escalation points.
- Difficulty:
- Intermediate
- Time:
- 60-120 min
Oil pressure switch replacement
NB oil-pressure-switch replacement guide with exact location cues, leak-vs-signal diagnosis, careful thread installation, and post-repair validation steps.
- Difficulty:
- Intermediate
- Time:
- 45-90 min
Front crank seal replacement
Mazda MX-5 NB (1998-2005) front crankshaft seal replacement workflow with leak confirmation, seal-depth guidance, and crank/hub damage-avoidance checks.
- Difficulty:
- Advanced
- Time:
- 4-7 hours (often combined with timing belt service)
Camshaft seal replacement
Mazda MX-5 NB camshaft front oil seal replacement workflow with leak-source confirmation, timing-belt overlap planning, and NB2 VVT-specific caution points.
- Difficulty:
- Expert
- Time:
- 5-8 hours (typically combined with timing belt service)
Rear main seal replacement
Mazda MX-5 NB rear main seal replacement guide with clutch/transmission removal context, leak-source confirmation steps, and year-specific torque caution.
- Difficulty:
- Expert
- Time:
- 6-10 hours (typically combined with clutch service)
Cylinder leak-down test
NB leak-down test workflow with precise compression-TDC setup, repeatable cylinder comparison, and clear leak-path interpretation for valve/ring/head-gasket diagnosis.
- Difficulty:
- Advanced
- Time:
- 90-150 min
Ignition timing check/adjustment
NB ignition-timing verification guide with exact timing-mark location, timing-light setup, and clear check-only vs adjustment-allowed decision logic by year/VIN FSM.
- Difficulty:
- Intermediate
- Time:
- 45-90 min