SEALEY VSE206 Petrol Compression Test Kit Instruction Manual

SEALEY VSE206 Petrol Compression Test Kit

Product Information: PETROL COMPRESSION TEST KIT MODEL NO: VSE206

Thank you for purchasing the Sealey Petrol Compression Test Kit Model No: VSE206. This product has been manufactured to a high standard and, if used according to the provided instructions and properly maintained, will give you years of trouble-free performance.

IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.

It is important to read these instructions carefully and note the safe operational requirements, warnings, and cautions. Please use the product correctly and with care for its intended purpose. Failure to do so may cause damage and/or personal injury and will invalidate the warranty. Keep these instructions safe for future use.

Safety Precautions

• WARNING! Ensure all Health & Safety, local authority and general workshop practice regulations are strictly adhered to when using tools.
• Ensure all health & safety, local authority, and general workshop practice regulations are strictly adhered to when using tools.
• Do not use the equipment if it is damaged. Maintain the equipment in good and clean condition for the best and safest performance.
• If required, ensure that the vehicle to be worked on is adequately supported with axle stands, ramps, and chocks.
• Wear approved eye protection and suitable clothing to avoid snagging. Do not wear jewelry and tie back long hair.
• Account for all tools and equipment being used and do not leave them in, on, or near the engine.
• When not in use, place the equipment in a protective case and store it in a safe, dry, childproof area.
• WARNING! Always refer to the vehicle manufacturer’s service instructions, or a proprietary manual, to establish the current procedure and data. These instructions are provided as a guide only.

Introduction

The Petrol Compression Test Kit Model No: VSE206 is designed for testing the compression of petrol engines. Please refer to the vehicle manufacturer’s service instructions or a proprietary manual for the current procedure and data. The provided instructions are a guide only. Ø59mm Gauge fitted with 250mm hose and quick connect. Scale reads from 0-21bar(0-300psi). Kit includes four extension hoses, seven plug thread adaptors from 10 to 18mm and a self- sealing quick connector. Suitable for most petrol engine cars and light commercials. Supplied in storage case.

Operation

The operation instructions for the Petrol Compression Test Kit are detailed in the user manual. Please refer to the manual for step-by-step instructions on how to perform the compression test.

Refer to attached parts list for contents.

TEST PROCEDURE

• WARNING! DO NOT use long reach adaptors on engines with standard spark plugs, as engine damage may occur.
• WARNING! Always release the pressure via the Retest Valve BEFORE disconnecting the tester. Press the retest valve slowly to release the pressure gradually. Refer to Fig.1.
• NOTE: variation in compression readings between cylinders is often a better indication of engine problems than the absolute values of compression.
• Run the engine until it reaches the normal operating temperature.
• Stop the engine and disconnect all spark plug wires, numbering them according to the cylinder to which they were connected.
• Loosen all spark plugs by about half a turn, but do not remove them.
• Using an air hose or wire brush, remove all the dirt and debris from the spark plug wells.
• Remove the spark plugs and place them on a clean, flat surface in the cylinder order in which they were removed.
• Remove the air filter and set the throttle plates to the wide open position, taking care not to damage the linkage or throttle components IMPORTANT: After test, failure to return the throttle plates to the closed position before starting the engine can cause serious damage to the engine.
• Disconnect the ignition system, following the manufacturer’s recommendations in the vehicle servicing manual.
• Select the spark plug adaptor and/or hose required for the vehicle. Screw the adaptor and/or hose into a spark plug well. Hand tighten only DO NOT use a wrench. Refer to Fig. 2.
• Connect the coupling on the gauge hose to the fitting on the spark plug hose. Ensure the hose couplings are fully engaged.
• Crank the engine for at least five compression strokes, or until the pressure reading on the gauge stops rising.
• Record the compression reading, then push the side release valve to relieve the pressure.
• Repeat the test and record the reading. Relieve the pressure and remove the hose from the spark plug well.
• Repeat paragraphs 3.1.8 to 3.1.12 for the remainder of the cylinders.

VALVE SEAL AND SPRING REPLACEMENT

• Turn the engine so that the piston of the cylinder to be worked on is at Top Dead Centre (TDC), with both valves closed.
• Choose the proper spark plug hose and remove the valve core from the end.
• Thread the spark plug hose into the spark plug hole of the subject cylinder.
• Connect the garage air supply and apply air pressure.
• NOTE: If the garage air hose uses a different quick coupler system than the spark plug hose, use the quick coupler of the VSE206 kit and attach it to the garage air hose.
• Replace the seals and springs as required, with the air pressure holding the valves closed.
• Disconnect the spark plug hose at the quick coupler.
• Carry out the same procedure on each cylinder that requires valve parts replacing.

Test Results

After conducting the compression test, refer to the user manual for interpreting and analyzing the test results. The manual provides guidance on understanding the compression readings.

GAUGE READINGS

• On a normal cylinder, the gauge needle should travel up the scale on each compression stroke until it reaches peak value. All cylinders should indicate a pressure that is within the vehicle manufacturer’s specifications, and the reading should not vary by more  than 10% from cylinder to cylinder.
• If the gauge needle does not travel up the scale, or if it remains at the same value for several strokes and then starts to climb, the problem could be a valve sticking.
• If the compression reading is considerably higher than the vehicle manufacturer’s specification, the problem may be carbon build-up in the cylinder. It may also indicate that either the piston, or the cylinder head, has been modified.
• If a reading on two adjacent cylinders is 20 psi (or more) lower than the other cylinders, the problem may be a cracked cylinder head or defective main gasket. Under these conditions, both coolant and oil may be found in both cylinders under these conditions.
• If the readings are low, or vary widely between cylinders, pour a teaspoon of SAE 30 oil into each cylinder and retest them. If the readings increase considerably, the problem may be poorly seated, or worn, piston rings. If the readings remain about the same,
• the valves and/or associated components may be the problem. A burned or damaged piston may also cause the same results.

Completion of Tests

• Clean, re-gap and reinstall the spark plugs in the same order in which they were removed, or install new spark plugs.
• Reconnect each spark plug wire to the plug it was connected to prior to removal.
• Return the throttle plates to the closed position.
• IMPORTANT: After test, failure to return the throttle plates to the closed position before starting the engine can cause serious damage to the engine.
• Reconnect the ignition system wiring disconnected at paragraph 3.1.7.
• Repeat paragraphs 3.1.8 to 3.1.12 for the remainder of the cylinders.

After the test, follow these steps to complete the process:

1. Clean, re-gap, and reinstall the spark plugs in the same order in which they were removed, or install new spark plugs.
2. Reconnect each spark plug wire to the plug it was connected to prior to removal.
3. Return the throttle plates to the closed position. It is important to close the throttle plates before starting the engine to prevent serious damage.
4. Reconnect the ignition system wiring that was disconnected during the test.
5. Repeat the necessary steps for the remainder of the cylinders.

Environment Protection

Recycle unwanted materials instead of disposing of them as waste. All tools, accessories, and packaging should be sorted and taken to a recycling center for proper disposal compatible with the environment. When the product becomes completely unserviceable and requires disposal, drain any fluids (if applicable) into approved containers and dispose of the product and fluids according to local regulations.

Register Your Purchase

Please register your purchase to ensure any future claims under warranty. The warranty period is 12 months from the purchase date, and proof of purchase is required for any claim.

Note: It is our policy to continually improve our products, and as such, we reserve the right to alter data, specifications, and component parts without prior notice. It is important to use this product correctly, and no liability is accepted for incorrect use.
Important: No Liability is accepted for incorrect use of this product.
Warranty: Guarantee is 12 months from purchase date, proof of which is required for any claim.

Sealey Group,
Kempson Way,
Suffolk Business Park,
Bury St Edmunds,
Suffolk. IP32 7AR

01284 757500
sales@sealey.co.uk
www.sealey.co.uk

© Jack Sealey Limited

VSE206 Issue 2 (H, F) 23/03/23

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