Leak Test Kit with Fluid

• Co in radiator leak test kit checks for head & gasket leaks
• Spots and locates combustion leaks quickly in cracked or warped heads, a leaky gasket or a cracked block
• The test is done by inserting the leak-check unit into the radiator filler opening, and doing the test with the engine idling
• The blue test liquid will turn yellow in 60 seconds if there is a combustion leak, no matter how small
• For pinpointing which cylinder is leaking disconnect one spark plug at a time and retest