Compression Test 2.7L & 3.0L GTDI
WARNING: This page is about a different car, the 2018 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
- Make sure the oil in the crankcase is of the correct viscosity and at the correct level and that the battery is correctly charged. Operate the vehicle until the engine is at normal operating temperature.
- Turn the ignition switch to the OFF position, then remove all the spark plugs. REFER to: Spark Plugs - 2.7L EcoBoost
or REFER to: Spark Plugs - 3.0L EcoBoost
.
- Loosen the Throttle Body (TB) inlet tube clamp and then disconnect the Throttle Body (TB) inlet tube.
- Manually set the throttle plates to the wide-open position.
- Install a compression gauge in the No. 1 cylinder.
- Install an auxiliary starter switch in the starting circuit. With the ignition switch in the OFF position, and using the auxiliary starter switch, crank the engine a minimum of 5 compression strokes and record the highest reading. Note the approximate number of compression strokes necessary to obtain the highest reading.
- Repeat the test on each cylinder, cranking the engine approximately the same number of compression strokes.
- Install the all the spark plugs. REFER to: Spark Plugs - 2.7L EcoBoost
or REFER to: Spark Plugs - 3.0L EcoBoost
.
-
NOTE: When installing the Throttle Body (TB) inlet tube, make sure that the Throttle Body (TB) inlet tube is fully seated against the hose stops.
Install the Throttle Body (TB) inlet tube, then tighten the Throttle Body (TB) inlet tube clamp.