A coolant tester exhaust gas measurement can help identify combustion gases entering an engine’s cooling system. A combustion leak occurs when gases from the combustion chamber escape past the head gasket, cylinder head, cylinder liner, or another component and enter the cooling water jacket.
Testing for coolant tester exhaust gas is an important diagnostic procedure because combustion gases in the coolant can indicate a potentially serious engine problem. A combustion leak tester or exhaust gas analyzer can help technicians identify signs of combustion leakage before the problem causes additional engine damage.
What Is Coolant Tester Exhaust Gas?
Coolant tester exhaust gas refers to combustion or exhaust gases that have entered the engine coolant system. In a properly functioning internal combustion engine, the combustion chamber and cooling system remain separated. A damaged head gasket, cracked cylinder head, cracked engine block, or other failure can allow combustion gases to pass into the cooling system.
When combustion gases enter the coolant, they can increase cooling-system pressure and contribute to overheating and coolant loss. Detecting these gases can therefore provide an important indication of a combustion-system leak.
What Are the Uses of a Coolant Tester Exhaust Gas Tester?
Most cars, trucks and other vehicles use water-cooled internal combustion engines. Because the cooling system operates adjacent to the combustion chambers, a failure in the sealing components can allow combustion gases to enter the coolant.
A coolant tester exhaust gas test can help technicians investigate symptoms such as:
- Unexplained engine overheating
- Excessive cooling-system pressure
- Coolant loss
- Repeated coolant overflow
- Bubbles appearing in the coolant
- Head-gasket failure
- Possible cylinder-head or engine-block damage
Exhaust gases entering the coolant can also change the chemical characteristics of the cooling system. Identifying combustion gases early can help technicians determine whether additional engine diagnostics are necessary.
How Does a Combustion Leak Tester Work?
A traditional combustion leak tester generally consists of a testing chamber, transparent sight glass and connection designed to seal against the radiator or coolant-system opening. The tester is positioned so that gases from the cooling system can be drawn through the testing chamber.
Before performing a test, follow the equipment manufacturer’s instructions and make sure the engine and cooling system are at a safe temperature. Never remove a radiator cap or open a pressurized cooling system on a hot engine, as hot coolant and steam can cause serious burns.
Once the tester is properly connected, combustion gases present in the cooling system can be analyzed. Changes detected by the testing fluid or gas-analysis equipment can indicate that exhaust gases are entering the coolant.
Using Gas Analysis to Test for Combustion Leaks
A gas analyzer can provide another approach to identifying combustion gases associated with an engine cooling-system leak. Rather than relying solely on visual observations, gas-analysis equipment can measure specific gases and provide quantitative information.
For professional automotive and engine testing applications, an exhaust gas analyzer can be used to measure combustion-related gases and evaluate engine emissions. Depending on the analyzer and application, measurements can include gases such as carbon monoxide (CO), carbon dioxide (CO₂), oxygen (O₂) and other combustion gases.
The appropriate testing method depends on the engine, cooling system and diagnostic objective. Always use equipment according to the manufacturer’s specifications.
Why Accurate Coolant Tester Exhaust Gas Measurements Matter
Finding combustion gases in coolant can be an important early warning sign of an engine problem. However, accurate testing is essential because cooling-system contamination, incorrect test procedures and other conditions can potentially affect results.
A reliable coolant tester exhaust gas testing procedure gives technicians useful information when diagnosing suspected head-gasket, cylinder-head or engine-block problems. Combining gas analysis with other diagnostic procedures can provide a more complete picture of engine condition.
Choosing a Reliable Gas Analyzer
The reliability of combustion and emissions testing depends heavily on the quality and suitability of the testing equipment. MRU Instruments offers professional gas analyzers and measurement equipment designed for demanding combustion and industrial applications.
For technicians and professionals looking for accurate combustion and exhaust measurements, MRU Instruments provides gas-analysis technology for a variety of engine and emissions-testing applications. Explore the available gas analyzers and measurement instruments at MRU-Instruments.com to find equipment suited to your testing requirements.