BMW 325is Battery Testers

Leaking engine cylinders is an important preventative maintenance test to do while racing. Learn the steps to perform this test and how to indicate proper engine tuning.

Whether you're trying to troubleshoot engine issues or want to get an idea what's going on inside that junkyard jewel that you just hauled home, a leak down test is a great way to ascertain the condition of an engine's cylinders without pulling it apart.

Our automotive battery buyer's guide walks you through the most popular battery types and how to determine what is best for your application, be it street performance, racing, or otherwise.

Testing a 2 or 3 wire speed sensor sounds difficult, but these videos show that it actually is quite easy!