Note: If there is insufficient power, increased oil and/or fuel consumption, measure the compression end pressure.
1. Check up pressure of the end of compression in cylinders.
A) Insert the compression gauge into the spark plug hole.
b) Fully open the throttle.
V) While cranking the engine over with the starter, measure the compression pressure.
Note: Always use a fully charged battery to get an engine speed of 250 rpm or more.
G) Repeat steps with (A) By (V) for each cylinder.
Note: measurements should be taken in the shortest possible time.
Compression end pressure:
3S-FE, 4S-FE
- nominal - 12.5 kg / cm2
- minimum — 10.0 kg/cm2
Pressure differences between cylinders - no more than 1.0 kg / cm2
4A-FE, 7A-FE
- nominal - 13.5 kg / cm2
- minimum — 10.0 kg/cm2
Pressure differences between cylinders - no more than 1.0 kg / cm2
5A-FE
- nominal — 14.0 kg/cm2
- minimum — 10.0 kg/cm2
Pressure differences between cylinders - no more than 1.0 kg / cm2
d) If the compression end pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps from (A) By (V) for cylinders with low compression pressure.
- If adding oil increases compression pressure, the piston rings and/or cylinder bore may be worn or damaged.
- If the pressure remains low, the valve may be sticking or not seated tightly, or there is a leak at the cylinder head gasket.