Supporting Vendors / Dealers - Advertising - Shop

Service Bulletin: Fluid Leak Detection

The following service bulletin was issued by Chevrolet in May of 1986 and contains excellent tips for tracking down hard to find fluid leaks which can be applied to all vehicle lines.

Subject: Fluid Leak Detection
Source: Chevrolet Dealer Service Bulletin
Bulletin Number: 86-83
Section:  0A
Date: May, 1986


When customer vehicles are brought in for fluid leaks from the engine, transmission, cooling system, etc., locating the source of the leak can be challenging.

If the leak is a result of a porous casting, a split seal, or a small pin hole in a hose for example, the source of the leak can be located faster and more accurately with the use of a special fluid additive and a "high intensity" ultraviolet (UV) black light.

These special additives (Dyes) can be added to any mineral based fluid such as engine oil, transmission fluid, engine coolant, power steering and rear axle oil. these special dyes do not harm any GM recommended fluids and usually dissipate afer approximately 300 miles of use.

When the dyes are added to the fluid and properly mixed together (done by normal driving) and then exposed to the black light, the fluid glows a bright yellow or bright green. This allows the source of the leak to be pinpointed, leading to reliable leak correction. There are both "low intensity" and "high intensity" black lights available. The "high intensity" light is preferred, as it has a more concentrated light beam.

"High intensity" black lights are available from several sources, including Kent Moore Tool (J-28428-A) and the GM Tool Equipment Program (#041-00001).

Additives (Dyes) are also available from Kent Moore

J-28431 - Suitable for engine oil, transmission oil, P/S fluid, and rear axle oils.
J-29545 - Used in engine coolant only.

The additives are shipped in a box of 24 one-ounce tubes.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
Error Codes On GM Radios Explained
Viewed 876 times since Tue, Jul 15, 2014
Technical Article: Advantages of an Oil Prime Tool
Viewed 810 times since Tue, Jul 15, 2014
GM Press Release: September 1, 1995: 1996 Corvette: Two Special Additions And New 330-HP LT4 V8 Highlight America’s Favorite Sports Car
Viewed 634 times since Thu, Aug 7, 2014
Technical Article: Synthetic Oil Use
Viewed 1426 times since Tue, Jul 15, 2014
Service Bulletin: Delco Freedom Battery Diagnosis Information
Viewed 3768 times since Tue, Jul 15, 2014
Paint: Orange Peel as it Applies to Corvette Paint Quality
Viewed 1052 times since Tue, Jul 15, 2014
Product Review: Best All-Round: We Test the Goodyear F1 GS-D3
Viewed 1203 times since Tue, Jul 15, 2014
Technical Article: Long Term / Winter Corvette Storage
Viewed 934 times since Tue, Jul 15, 2014
Technical Article: Timing and Vacuum Advance 101
Viewed 1092 times since Tue, Jul 15, 2014
Technical Article: Corvette Performance Testing
Viewed 630 times since Tue, Jul 15, 2014