Testing the pressure in the engine block is a way to identify if the engine cylinder or engine heads are leaking. Usually you want to test the pressure in an engine if you notice it is leaking engine cooling liquid, and it is not leaking via the hoses or the radiator. Testing the pressure on an engine block can be a time-consuming and difficult task, but it can be done more efficiently with the right tools.
Things You'll Need
- Universal engine caps
- Spray bottle
- Compression tester kit
- Air compressor
Remove the engine and leave only the engine block out. Most major auto parts have manuals on how to remove the engine block, as it varies significantly by make and model of the car.
Cover all the coolant ports on the engine block except one. You can find universal temporary caps at most auto parts stores. Just push in the caps in all the coolant ports. The coolant ports had hoses connected to the engine that brought in coolant fluid.
Insert the air tip into the unblocked coolant port. The air tip will be included in the compression tester kit. Push it in place until it is secured.
Mix water and soap together in the spray bottle in a five-to-one ratio. Shake the bottle vigorously to create bubbles.
Connect the compression gauge to the air tip in the engine block. Connect the air hose from the air compressor to the compression gauge, and turn on the air compressor.
Spray the engine block and cylinder with the spray bottle. You will see bubbles form where there is an air leak. The compression gauge will let you know the pressure in the engine.
- Photo Credit old engine image by John Sfondilias from Fotolia.com
How to Test Fuel Pressure On Your Car
Your car is running poorly or not at all, I will show you how to test your fuel pressure to determine if...
How to Test an Air Pressure Switch
Air pressure switches serve many functional purposes in the home. They are found on almost all shop air compressors and some central...
How do I Check a GM Engine Block Code?
Every General Motors engine has several stampings on it. There is a date stamp and a casting stamp. The casting stamp is...
How to Locate the Oil Pressure Sensor Switch on a Cavalier Engine Block
A vehicle's oil pressure is monitored by a sensor. Modern vehicles typically have plastic sensors housed on the side of the engine...
How to Test the Oil Pressure Sensor on a Chevy 4.3L Engine
The oil pressure sensor on a Chevrolet 4.3L V6 engine is part of a network of sensors that provides the powertrain control...
How to Use a Fuel Pressure Tester
The fuel pump on a vehicle may fail over time. There are a few ways a fuel pump can fail: Ignition pressure,...
How to Test Transmission Pressure
Taking your car to the mechanic can be expensive. The transmission on your car is something that must be maintained for your...
How to Check Compression in a Big Block
Checking the compression on your big-block engine can tell you several things about its condition. A compression test can reveal leaking piston...