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How to Perform a Leak-Down Test When your street or race engine starts showing signs of "lack-of-power", a common and yet simple test that can be performed is a "Leak Down" test. A "Leak Down" test … Read more

Spark Plugs Spark plugs are one of the most misunderstood components of an engine. Numerous questions have surfaced over the years, leaving many people confused. Spark plug reading is a science al … Read more

Dowel Pin Clearance Another contributing factor to a "Blown Head Gasket" is dowel pin clearance - or lack of clearance, which can occur when a cylinder head is milled too much. This is an often-ove … Read more

Engine Replacement For those Toyota enthusiasts whose time has come to replace the engine in their Celica, Pick-Up or 4 Runner, there are many choices. There are many engine builders and re-manufact … Read more

Measuring Horsepower If you want to know the horsepower of an engine, you hook the engine up to a dynamometer. A dynamometer places a load on the engine and measures the amount of power that the … Read more

Compression Testing vs. Leak Down Testing There has been great confusion encountered regarding compression tests and leak down tests. A compression test is typically done prior to a leak down test a … Read more