This kit fits ALL 116, 123 and 126 4 and 5 cylinder diesels, 616 and 617 designation. This is one of the most common oil leaks on the older Mercedes diesels from 1977 to 1985. It is often found at the gasket between the engine block and the oil filter housing. A lot of oil under high pressure moves through the oil filter housing, and over time the gasket hardens and shrinks. Leaks soon develop that can cover the floor and underside of your car with dirty black engine oil. Look on the underside of your oil filter housing to check for leaks.
Product Details
Replacing this gasket can be a messy and difficult job. Without the right tools and some insightful tips in this kit, the job can drive you over the edge. From my experience replacing many of these gaskets, I have developed a couple of special tools and a few techniques to make this job much smoother. You must remove the oil cooler lines and get under the car to complete this job. This kit includes an OEM-grade specialty gasket (do not use an aftermarket gasket here), two special metric Allen wrenches, two tie wraps, and complete PDF instructions.
I highly - in fact - strongly recommend you purchase my special wrench set to remove the oil cooler lines from the oil filter housing. Normal wrenches will not work. (see below)
We recommend watching this video explaining the kit and needed tools 1977 to 1985 Mercedes Diesel Engine Oil Filter Housing Leak Fix Kit Explained.
If you have a W116 or W123 diesel, we recommend you purchase the gasket for the oil pressure plate and the special wrench to remove the oil pressure line. (see below).
If you own a turbo diesel, we recommend you purchase the two sealing rings for the turbocharger oil line connected to the side of the housing. (see below)
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How to view the PDF digital instructions:
Once you complete the purchase of this product you will be able to download the digital instructions immediately when you are logged in and on your personal account page (click on My Account). Any PDFs will show up under My PDF Manuals. You will be allowed three downloads, so please save the file on your machine for backup.
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Related Products:
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Even many old-time Mercedes diesel "experts" are surprised about this part. It is so unknown that it never gets replaced in the oil filter housing, meaning that almost all of them are no longer working today. Watch the video below, and Kent will explain its location and function.
1978 TO 1985 TURBO Diesel Oil Cooler Thermostat Kit
We know it is a surprise to many owners to discover there is a small thermostat inside the oil filter housing. Rather than write about it, watch the video below and Kent will explain the theory of operation and how to get it it.
Oil Cooler Thermostat Removal and Testing - On Demand Video
Want to find out if your oil cooler thermostat is working correctly? In this 22-minute video, Kent will take you through a test sequence that you can perform in your garage. Please note that this video DOES NOT include details of removing or replacing the oil filter housing.