![]() For example, if when performing a leak down test you encounter a particular cylinder that is leaking significantly, simply listen at the crankcase breather, intake, and exhaust to determine the source. A leak-down test, however, can help pinpoint a potential problem. If a particular cylinder has a low compression reading, further investigation will be required. Regardless of which test you perform, results should be relatively consistent from cylinder to cylinder. Both tests are pretty straightforward, however, a leak-down test requires a compressed air supply and the engine’s harmonic balancer to be marked in 0 deg., 90 deg., 180 deg. A compression tester ( Allstar Performance ALL96520) or leak-down tester (Total Seal TOT14MMLDT) are required for each task. If the overall condition of the engine is in question, it may be a good idea to perform a compression or leak-down test. Most maintenance services can be performed by nearly anyone who is mechanically inclined or has the initiative to learn the procedure through a how-to video on YouTube. Proper maintenance allows you to diagnose and repair mechanical problems promptly, typically with less impact on the pocketbook than when they are delayed. ![]() It’s certainly a good time to perform preventative maintenance and do a thorough mechanical inspection, particularly if there were any issues that existed prior to storage, such as a loss of power, unexplained noises or fluid leaks. ![]() If you drove your race or performance car into the garage last fall and haven’t touched it since, it’s probably time to start getting it ready for spring. ![]()
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