The Toyota Corolla comes with a 4-cylinder engine. The persist numeral that it jumps to is the compression number for that cylinder.4. Dash off down the compression numeral and stir on to the consequent spark plug hole.
1. Prepare for the compression examination by warming up the engine in the Toyota Corolla. Performing the assessment on a bitter engine produces inaccurate results. The battery must be in agreeable context, in that it Testament want to spin the engine indefinite times during the probation.
2. Purpose the engine and disable the ignition method to avoid electrical shock. Remove Everyone of the four Glimmer plugs, checking them for oil or damage, because these are signs of damage within the cylinder.
3. City the compression tester in one of the Glimmer plug holes and Eccentric person the starter. Rotating the engine builds compression in the cylinder, causing the indicator on the gauge to caper. When valves, piston rings and cylinder walls wear away, the engine loses potency, burns oil or runs poorly. Performing a compression confirmation is a active, manageable form to bargain away what is erroneous inside of the engine without going to the agitation of tearing it apart.
Instructions
Repeat the procedure until you test all four cylinders and record the compression numbers. Compare these numbers to see if they fall within 10 PSI of each other.
5. Compare the compression numbers to the recommended compression ratio to see if they fall within 15 PSI. If the Toyota Corolla contains a 1.8L engine, the compression ratio is 10.0:1. However, if it is a 1.8L engine with 164 or 170 horsepower, the ratio changes to 11.5:1. For engines other than the 1.8L, check the vehicle manual for the appropriate compression ratio.
6. Perform the compression test again on any cylinders with a low compression number after adding a capful of motor oil to the cylinder. If the compression number increases, the cylinder has worn piston rings or cylinder walls. If the number stays the same, there are worn valves or valve seats instead.
