Liquid Tune-Up

Liquid Tune-Up: CRC Internal Engine Cleaner

CRC Industries, Inc., CRC Top Engine Cleaner ($10) is an aftermarket top-end cleaner available for professional automotive technicians and do-it-yourselfers.

“Today’s vehicles are designed to recirculate exhaust gas which reduces emissions but also causes harmful carbon deposits to form,” says Adam Selisker, CRC vice president of Technology.  

“Those carbon deposits collect on intake manifolds and intake valves, and on built-up gum and varnish residue in the engine. If left untreated, this can lead to performance problems such as engine pinging or knocking, increased fuel consumption, rough idling and power loss.”

Using the attached extension tube, CRC Top Engine Cleaner is sprayed directly into the throttle body while the engine is idling at around 2,000 RPMs.

Once the entire can has been dispensed, the engine should be turned off and the chemical allowed to heat-soak for 15-20 minutes.

When the engine is restarted, the vehicle will dispel white smoke through the exhaust. The vehicle should be driven until that white smoke disappears.

Selisker says, “For the best results, we recommend that you change the oil and oil filter after running a top engine cleaner through your engine.”