Overhauling a W116 300SD Engine Driven Vacuum Pump

Feb 4, 2022

Grafco Electric is proud to provide you with a comprehensive guide on overhauling a W116 300SD engine driven vacuum pump. This in-depth guide will equip you with the knowledge and skills necessary to successfully complete the overhaul process.

Understanding the Importance of Vacuum Pump Overhauling

The vacuum pump in your W116 300SD is a vital component that plays a significant role in various systems within the vehicle. It is responsible for creating the necessary vacuum pressure to operate systems like the brake booster, climate control, and more. Over time, the vacuum pump may experience wear and tear, leading to decreased performance and potential failure.

By performing regular overhauls on your engine driven vacuum pump, you can ensure its longevity, optimal performance, and prevent costly repairs down the line. Additionally, a well-maintained vacuum pump contributes to the overall safety and efficiency of your vehicle.

The Overhauling Process: Step-by-Step Guide

Before starting the overhaul process, ensure you have the necessary tools, replacement parts, and a clean working area. Here is a step-by-step guide to help you through the process:

Step 1: Removal of the Vacuum Pump

Begin by disconnecting the negative battery terminal to prevent any electrical mishaps. Then, proceed with removing the necessary components to gain access to the vacuum pump. Carefully disconnect the hoses, electrical connections, and mounting bolts to detach the pump from the engine.

Step 2: Disassembly of the Vacuum Pump

Once the pump is removed, carefully disassemble it by removing the various components. Take note of their arrangement and keep track of any seals or gaskets that need replacement. Inspect all parts for wear, damage, or signs of degradation.

Step 3: Cleaning and Inspection

Thoroughly clean all the disassembled components using a suitable degreaser. Ensure that all dirt, grime, and old lubricants are removed. Inspect each part for any signs of wear, cracks, or corrosion. Replace any damaged or worn-out parts with high-quality replacements.

Step 4: Reassembly and Lubrication

Following the manufacturer's guidelines and using appropriate lubricants, begin reassembling the vacuum pump. Pay close attention to the correct positioning of each component and tighten all bolts and screws as specified. Apply lubrication to the necessary parts to ensure smooth operation.

Step 5: Reinstallation and Testing

Carefully reinstall the overhauled vacuum pump back into its original position. Reconnect all hoses, electrical connections, and mounting bolts securely. Before starting the engine, conduct a thorough check to ensure everything is properly connected. Start the engine and test the functionality of the vacuum pump by operating the associated systems.

Trust Grafco Electric for Your Vacuum Pump Overhauling Needs

Grafco Electric is a leading provider of automotive electrical solutions, including vacuum pump overhauling services. Our team of experienced technicians understands the intricacies of the W116 300SD engine driven vacuum pump and can guide you through the entire process. We are committed to delivering excellent results and ensuring the satisfaction of our customers.

By choosing Grafco Electric, you are partnering with a trusted name in the industry, dedicated to providing high-quality services at competitive prices. Contact us today to schedule an appointment or to learn more about our vacuum pump overhaul services.


Overhauling a W116 300SD engine driven vacuum pump is a crucial maintenance task that should not be overlooked. By following our comprehensive guide, you have gained the knowledge and understanding required to successfully complete this process. Regular overhauls will maximize the performance and lifespan of your vacuum pump, contributing to the overall efficiency of your vehicle.

At Grafco Electric, we prioritize customer satisfaction, and our team is ready to assist you with your vacuum pump overhauling needs. Trust us to provide reliable expertise and top-notch services. Contact us today and ensure your W116 300SD engine driven vacuum pump is in optimal condition.

Jamie Medlicott
Thanks for sharing this guide! 👍 Overhauling a W116 300SD engine driven vacuum pump is a crucial maintenance task that requires attention to detail. Understanding the importance of vacuum pump overhauling is key to keeping the various systems in your car running smoothly. With this guide, you'll gain the knowledge and skills necessary to tackle this task successfully. Don't neglect the maintenance of your vacuum pump, as it can impact the overall performance of your vehicle. Happy overhauling!
Nov 11, 2023
Lan Tran
Great guide! 👍
Oct 15, 2023