What are the Steps for Checking a Gasoline Engine?

What are the Steps for Checking a Gasoline Engine? Let's have Googol Power Technology explain it to everyone.

1. CHECK THE COOLANT LEVEL AND COLOR

(1.1) Check the coolant level and color. The coolant level should be above the middle mark but below the upper mark. Low coolant levels can lead to engine overheating.

(1.2) Open the expansion tank cap, open the drain valve, drain the old coolant completely, close the drain valve, add new coolant to the tank, filling it above the middle mark.

(1.3) Refer to the engine user manual for coolant selection and replacement cycle.

(1.4) Note: Before opening the expansion tank cap, the engine should be turned off and allowed to cool.

Different types of coolants should not be mixed, and only qualified coolants should be used. Choose a coolant compatible with the ambient temperature; do not use tap water as a coolant.

2. REPLACE THE ENGINE OIL FILTER

(2.1) Use a tool to loosen the old oil filter, then hand-remove it, and check the filter base for foreign objects.

(2.2) Unpack the new oil filter, inspect its outer shell and internal chamber for any abnormalities, ensuring it's intact.

(2.3) Add new oil to the new filter and evenly apply a layer of oil on the rubber ring surface. Install the filter, tighten it by hand, and then use an oil filter wrench to further secure it.

(2.4) Refer to the engine user manual for the oil filter replacement cycle.

(2.5) Add new oil and, after waiting for 10 minutes on level ground, the oil level should slightly exceed the middle mark on the dipstick. Refer to the engine user manual for oil requirements and replacement cycles.

(2.6) Wipe the area around the filter with a clean cloth, then start the engine and run it for 2-3 minutes to check for oil leaks.

3. INSPECT THE IGNITION COIL HIGH-VOLTAGE WIRE

(3.1) The secondary output voltage of the ignition coil reaches up to 40k volts. Therefore, never wash the engine directly with water during engine use, especially the ignition coil.

(3.2) Every three months or 20.000 kilometers, clean the oxidation layer between the terminal of the igni-tion coil and the spring, as well as the oxidation layer between the spring and the spark plug, and apply conductive paste.

(3.3) Inspect the ignition coil boot for aging or cracks every three months. If there are cracks, replace it promptly.

(3.4) During installation, tighten the ignition coil mounting bolts to ensure a tight contact between the spring inside the ignition coil boot and the spark plug head.

(3.5) Apply conductive paste on the contact area between the spark plug head and the ignition coil during installation to prevent increased resistance due to heat oxidation, reducing the spark plug's ignition energy, and potentially causing ignition failure. Additionally, apply insulating grease on the outer surface of the rubber boot to prevent leakage between the spark plug and the cylinder head due to boot aging.

(3.6) The tightening torque for the ignition coil fastening screws is 7-9 N·m;excessive torque can cause the terminal to break due to excessive lateral force.

(3.7) Check the high-voltage wire for cracks or abnormal discharge;replace it promptly if any issues are found.