www.ferretinstruments.com
DO NOT APPLY EXCESSIVE PRESSURE INTO AN OIL SYSTEM. IT IS POSSIBLE TO DAMAGE OR
DISLODGE SEALS AND GASKETS WITH EXCESSIVE PRESSURE.
Apply the CoolSmoke to the dipstick tube for a minute or so, then watch the results. Fog will eventually
appear at the sight of the leak.
Adapters are supplied to plug off the PCV System (both Valve & Fresh Air Intake). If your oil leak isn’t
found with low pressure testing, you have the option of increasing the pressure, by plugging off the PCV
System and trapping the smoke in the oiling system.
THERE ARE NO PUBLISHED SPECIFICATIONS FOR PRESSURIZING AN OIL SYSTEM. SOME LARGE
AREA SEALS AND GASKETS WILL BE UNDER STRESS IF THEY ARE EXPOSED TO EXCESSIVE
PRESSURES. USE EXTREME CAUTION
Evaporative Emissions Systems
Basically there are two types of EVAP Systems. Vacuum operated and electronically operated. Both
types are designed to ensure that hydrocarbon (gasoline) fumes from the fuel tank do not get into the
Earlier vacuum operated systems, simply provide a vacuum signal from the engine, which opens a valve
(diaphragm) on the top of the canister that allows the stored hydrocarbons to be sucked into the engine
Electronic systems use a computer controlled solenoid, in place of the older vacuum control valve.
Additionally OBDII Systems utilize an in-tank vacuum/pressure sensor that is monitored by the on-board
computer, as well as additional venting solenoids. Most manufacturers recommend that any pressure
applied to the system be kept below 1psi. Your CoolSmoke will accomplish this in the 1psi mode.
The quickest & simplest method regardless of which type of system you are testing, is to ll the system
through the EVAP Port with the appropriate adapter. This will allow fog to ll the entire system, without
disturbing it, thus checking the gas cap too. In some cases, opening the gas cap while lling the system with
fog may be advantageous, since this may help to distribute fog more evenly throughout the system.
CoolSmoke provides suf cient volume, that lling the entire system will take just a couple of minutes.
An alternate option is to ll the tank via the fuel cap. It is recommended that a shop cloth be used as a
gasket, along with the appropriate supplied rubber adapter. The cloth will also protect against losing the
Frequently, disconnecting just one end of a heater hose (empty of coolant) and applying CoolSmoke to
it, will provide an answer to a leak location. If not, by disconnecting both heater hoses at their source,
then plugging off one end, CoolSmoke will ll the area and will often reveal the leak.
Heater cores can be tested quite simply. Drain and disconnect the lower hose. Turn on the ignition and
the blower motor on low, with defrost selected if possible. Apply CoolSmoke to the heater hose-pipe,
while observing the closest defroster duct. In some cases, it may be necessary to run the engine for this
test. If so, remove both heater hoses from the heater core and join them together (usually with a ushing
T). Plug one of the heater core pipes and apply to the other. Start the vehicle with the defroster and low
(2 pages)
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