TRIDENT BLOCK TEST FLUID KIT

How It Works

1. Fill tester with fluid: The test fluid is normally bluish in colour.

2. Connect the tester: To the radiator neck or the coolant reservoir so that it is exposed to the cooling system’s vapour/pressure.

3. Run engine/pressurise: The engine is run so that any combustion gases entering the cooling system are pushed through the tester.

4. Observe fluid colour: If combustion gases (CO₂ etc.) are present, the test fluid changes from blue to yellow. UK Tools+1

• If the fluid remains blue, likely no combustion leakage is occurring (or leak is below detectable threshold).

• If changes to yellow, there is a leak somewhere — head gasket, cracked head/block, or warped surfaces

• When to Use It

  Use this tester kit when you suspect there’s a combustion leak or head gasket failure. Here are typical symptoms / situations:

  • White smoke from exhaust

  • Coolant loss with no obvious external leak

  • Overheating, or coolant turning brown/milky (oil contamination)

  • Bubbles in the radiator/coolant overflow tank

  • Exhaust smell in coolant

  Also useful in any situation where engine performance is poor, oil and coolant appearance is abnormal, or after engine overheating.