The source of a vehicle fluid-leak is not always easy to find, particularly when you're peering under the hood of some of today's engines with their array of electronics, emissions controls and other auxiliary systems. If something's leaking onto your garage floor, but you just can't seem to determine where it's coming from, consider using an ultraviolet leak detection-system. This remarkably handy troubleshooting device was once used almost exclusively by professional mechanics. More recently they have become more affordable and suitable for use by do-it-yourselfers. The kit comes with everything that's required for performing several leak tests. It contains an ultraviolet light and a series of chemical dyes. Each dye is formulated to work in conjunction with a specific automotive fluid. The UV light hooks directly to the vehicle's battery for its power source. To conduct each test, follow the instructions that come with your kit . In this demonstration, we check for a radiator-coolant leak. - On a cool engine, remove the radiator cap and add the tracer dye (figure A ) according to the manufacturer's instructions. In this case, it requires adding about half an ounce of antifreeze dye.
- Take the car on a drive for about 15 minutes, giving the coolant and dye a chance to circulate through the engine block and cooling system. Run the heater inside the passenger compartment on full force so that coolant circulates through the heater core and heater hoses also.
- Shut down the engine and let it cool.
- Use the UV light to detect the presence of tracer dye (and hence coolant) in the engine compartment -- around the radiator cap, upper and lower radiator hoses, heater hoses, heater core and other elements of the cooling system. Pay especially close attention to the hose ends, hose connectors, clamps, thermostat housing and other areas where routine wear can lead to leaks.
In our case, we discovered a leak at the upper radiator hose where it enters the engine block (figure B), and also at the end that connects to the radiator itself. There was also a small leak at the upper heater hose where it connects to the heater core. All of these are probably simple fixes requiring no more than checking the hose ends and tightening or replacing hose clamps (figure C). Similar leak diagnostics can be performed for engine oil leaks as well as the other fluid systems such as brake, transmission and steering fluids. Follow the kit manufacturer's instructions when conducting any of these tests.
RESOURCES :
Dye-Lite Flourescent Leak Detection System
Model: TP-8000
The Dye-Lite System
is available from
Tracer Products
A Division of Spectronics Corporation
956 Brushy Hollow Road
P.O. Box 483
Westbury, NY 11590
Toll-free: 800-641-1133
Phone: 516-333-1254
Fax: 516-876-8411
Web site:
www.tracerline.com
E-mail: UVUV@aol.com
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