To Next PageTo Next Page
Need help?Do you have a question about the Sealey VSE953 and is the answer not in the manual?
Instructions for testing back pressure via the oxygen sensor port.
Procedure to test exhaust gas containment.
Steps for performing a vacuum test on the exhaust system.
Instructions for testing back pressure via the oxygen sensor port.
Procedure to test exhaust gas containment.
Steps for performing a vacuum test on the exhaust system.
This document describes the Sealey Catalytic Converter Back Pressure Test Kit, Model No. VSE953, a specialized tool designed to assess the operational health of a vehicle's exhaust system, specifically the catalytic converter and silencer, by measuring back pressure. The kit is also versatile enough to be used for vacuum testing and low-pressure fuel system diagnostics.
The primary function of the VSE953 kit is to diagnose potential blockages or restrictions within a vehicle's exhaust system. It achieves this by measuring the relative back pressure, which is the resistance to exhaust gas flow. A high back pressure reading can indicate a clogged catalytic converter or a restricted silencer, both of which can significantly impair engine performance and fuel efficiency.
Beyond exhaust system diagnostics, the kit's gauge is designed with a colour-coded scale that allows for easy interpretation of readings for both pressure and vacuum. This dual capability extends its utility to other areas of vehicle diagnostics, such as testing low-pressure fuel systems for proper operation and assessing engine vacuum, which can reveal issues with valve timing, sticky valves, or air leaks in the inlet manifold.
The VSE953 kit is designed for straightforward connection to the exhaust system. It includes two oxygen sensor dummy adaptors (M12x1.25 and M18x1.5) that allow the user to connect the gauge directly into an existing oxygen sensor port. This method is preferred for its accuracy and ease of use, as it leverages pre-existing access points in the exhaust system.
For vehicles without oxygen sensors or where removal is not feasible, the kit provides brass cone adaptors. These can be used by drilling a small hole in the exhaust pipe (away from welds and not into the catalyst) to obtain a reading. After testing, the hole can be sealed with a self-tapping screw or by welding. This feature ensures the kit's applicability across a wider range of vehicles.
The gauge itself is equipped with a hanging chain, enabling hands-free operation during testing. This is a practical feature that enhances user convenience and safety, allowing the technician to focus on engine operation and readings without having to hold the gauge.
For exhaust back pressure testing, the procedure involves connecting the gauge to an oxygen sensor port, starting the engine, and observing readings at idle and at 2500rpm. Specific pressure thresholds (e.g., not exceeding 1psi at idle and 2.5psi at 2500rpm) are provided as guidelines for diagnosing restrictions. The kit also supports testing for blocked catalytic converters by comparing readings from pre-cat and post-cat oxygen sensor ports.
For vacuum testing, the kit connects to the inlet manifold. The gauge's steady needle reading between 43 and 55cmHg indicates a healthy engine. Deviations from this range, such as a dropping needle, rapid pulsations, or slow recovery, can pinpoint various engine issues like sticky valves, tight valve clearances, burnt valves, weak valve springs, worn valve guides, or a partially blocked exhaust system. The kit also provides guidance for checking the choke by observing the gauge's rise to 55cmHg when the throttle is closed and the engine is turned over.
The VSE953 kit emphasizes the importance of maintaining tools in good and clean condition for optimal and safe performance. Users are advised not to use the test kit if it is damaged, as this could compromise accuracy or safety.
The instructions highlight the need to account for all tools and parts during use to prevent them from being left in or on the engine, which could lead to damage or safety hazards.
While specific cleaning instructions for the components are not detailed, the general emphasis on maintaining tools in good condition implies regular cleaning and proper storage after each use. The kit's robust construction is designed for durability, ensuring years of trouble-free performance when used and maintained according to the provided guidelines.
The document also includes a general environmental protection statement, encouraging users to recycle unwanted materials and dispose of the product and fluids according to local regulations when it becomes unserviceable. This reflects a commitment to responsible product lifecycle management.
Overall, the Sealey Catalytic Converter Back Pressure Test Kit, Model No. VSE953, is a comprehensive and user-friendly diagnostic tool that provides valuable insights into the health of a vehicle's exhaust system, fuel system, and engine vacuum, supported by clear operational guidelines and a focus on safety and proper tool maintenance.
General| Model No | VSE953 |
|---|---|
| Category | Test Equipment |
| Power Supply | 12V DC |
| Weight | 1.5 kg |
| Nett Weight | 1.5 kg |
| Operating Temperature | 0°C to 40°C |
