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Westward 40JM18 22-piece compression tester kit in plated steel case, 15 by 11 inches

Westward

Westward 40JM18 Compression Tester Gasoline 0-300 psi 22-piece

SKU CH-KC53-A4JG6

A 22-piece gasoline compression tester kit with adapters for engine diagnostics up to 300 psi

  • Product typeAutomotive Service & Shop Tools
  • Measures cylinder pressure up to 300 psi
  • 22-piece kit covers most gasoline engines
  • Includes adapters for quick connection
  • Plated steel construction resists corrosion
  • Compact 15 in by 11 5/8 in case stores neatly

22-piece compression tester kit

The Westward 40JM18 kit provides a 22-piece compression tester designed for gasoline engines with a 0 to 300 psi range. It includes multiple adapters for various engine configurations and features plated steel construction for durability. The kit measures 15 in overall length and 11 5/8 in overall width for shop storage.

Replaces basic single-gauge testers

This kit upgrades from single-reading tools by supplying a full adapter set that covers more cylinder types in one box. The jump is worth it when a technician needs to diagnose multiple gasoline engines without hunting for separate fittings. The 300 psi gauge handles standard compression checks across common applications.

Suits professional automotive technicians

The comprehensive adapter count suits professional automotive technicians who service a variety of gasoline engines daily. Shops restricted by California Proposition 65 regulations should note the listed chemical warnings before purchase. Hobbyists needing only occasional single-vehicle checks may find the 22-piece count excessive for their tool budget.

How it compares

Measured against everything we stock in Welding Equipment & Positioners, at today’s prices. Recalculated every night.

Price $128.99
Pricier than about 70% of the 1,978 comparable items (median $50.99).

Specifications

Product
Brand nameWESTWARD
Product typeAutomotive Service & Shop Tools

Questions about this item

What engine thread sizes do the 22-piece kit adapters cover?

The kit includes multiple adapters for common gasoline engine spark-plug threads; match the adapter to your engine’s specific thread size before testing.

How do I connect the 15 in gauge hose without cross-threading the adapter?

Hand-thread the correct adapter into the spark-plug hole until snug, then attach the quick-connect hose; avoid using tools on the adapter.

When should I replace the rubber seals on the 22-piece adapter set?

Inspect seals before each use; replace any that show cracking, hardening or loss of elasticity to maintain accurate 0-300 psi readings.

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