AUTOOL HTS686 is a special machine for engine Intake pipe and intake valve back side clean.
Close intake valve, then spray walnut powder into engine intake via air pump(not include), meanwhile HTS686 will recycle walnut powder by vacuum.

This is a closed loop. Walnut powder will impact carbon deposition on inner wall of intake pipe. After thousands of impact, carbon deposition will be clear thoroughly.

Chemical cleaning agent will corrodes pipe and shortens the lifetime of engine.

Walnut powder is pure natural polish material. It show high performance in hardness, anti-pressure and wear-resisting.

Walnut powder hardness was lower than metal but higher than carbon deposition. Take these advatages,

AUTOOL HTS686 will clean clean intake pipe and back side of intake valve thoroughly but no damage.High-precision engine system is sensitive to foreign matter of intake pipe.
That is why we need AUTOOL HTS686 to clean carbon deposition in intake pipe. Engine should be closed before clean,then turn crankshaft to close intake valve. AUTOOL HTS686 clean one intake pipe each time,6 cylinder engine should cleaned 6 times one by one(and so on).

AUTOOL HTS686 is specail for intake pipe and intake valve back side clean only,if you want to clean carbon deposition on injector/throttle valve/cylinder, please choose Ultrasonic Fuel Nozzle Gasoline Tester Cleaning Detector 6 Cylinders.


Walnut powder residual in intake pipe will go to ashes in high temperature after engine start.

Package include:

1x AUTO HTS686 unit

1x Spray gun

1x Goggles

1x Recycle hose

2x Spray gun connector