Block Tester brand replacement combustion leak test fluid (16 ounces) turns from BLUE to YELLOW in the presence of exhaust gases. Store in a cool, dark place for maximum shelf life of about 1 year.

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Block Tester brand replacement combustion leak test fluid (16 ounces) turns from BLUE to YELLOW in the presence of exhaust gases. Store in a cool, dark place for maximum shelf life of about 1 year.

  • 16 ounces / 474 ml (good for 16 tests in Block Tester brand combustion leak tester)
  • Use in Block Tester brand combustion leak tester or other fluid-based leak testers
  • Works with GAS or DIESEL engines as well as propane, CNG, and other alternative fuels
  • When fluid turns from BLUE to YELLOW combustion leak is present
  • 16 ounces / 474 ml (good for 16 tests in Block Tester brand combustion leak tester)
  • Use in Block Tester brand combustion leak tester or other fluid-based leak testers
  • Works with GAS or DIESEL engines as well as propane, CNG, and other alternative fuels
  • When fluid turns from BLUE to YELLOW combustion leak is present

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