MV5525 Compression Tester


This quick-test style tester does not require threading into the spark plug hole, making it an ideal, economic solution for quickly diagnosing engine compression problems such as worn piston rings, sticking or burnt valves, blown head gasket(s) or carbon build-up in cylinders, on cars and small engines.

Not for use on diesel engines.


  • Large easy-to-read pressure gauge
  • Universal rubber adapter fits virtually any size spark plug hole
  • Manual release valve holds peak pressure readings for easy recording
  • Small compact unit fits conveniently into tool box


  • 2¾ in. (70 mm) diameter Bourdon tube gauge (readings indicated in psi and kPa) with manual pressure release, 15 in. (380 mm) braided hose and GM/Chrysler adapter
  • Ford adapter
  • 6 ft. (1.8 m) fuel drain hose
  • User manual (English/Spanish/French)


Max. pressure
300 psi (2070 kPa) (20.7 bar)
Packaged weight6.7 oz (190 g)
Size6 x 2¾ in. (150 x 70 mm) gauge

Proposition 65: Click here to read the full warning