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$58.75

OM 617 Turbo Diesel Original Style Plastic Breather Tube w/ Rubber Hose Fittngs - NEW!

Fits 5-Cylinder turbo Diesel engines 1981-1984 with air filter mounted on the engine / without trap oxidizer. See pictures

This is a complete kit. Aftermarket new plastic breather tube with rubber attachment elbows, one new clamp, and a zip tie. You can see below how it installs on a turbo 300TD wagon. Watch the video for more specific details.

On Demand Video
$14.99

1977 TO 1985 Diesel Oil Cooler Thermostat Replacement Instructions - On Demand Video

You may not even know that this thermostat exists, and most have failed or are failing!

This will be instructional information that you can not find anywhere else! The focus of the 25-minute video will be on removing and replacing the oil cooler thermostat once the oil filter housing is removed for a 1977 to 1985 engine ( excluding the 190D).

On Demand Video
$12.99

Oil Cooler Thermostat Removal and Testing - On Demand Video

We would speculate that well over half of these oil cooler thermostats are no longer working on these old 77 to 85 Diesel engines, but it is possible to test them in a carefully controlled environment.

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.

$122.75

1978 TO 1985 TURBO Diesel Oil Cooler Thermostat Kit

More coming Mid-November. For 300D, 300CD, 300TD, and 300SD built in those years. This thermostat has a very limited supply. You might want to purchase while still available. There is NO substitute.

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.

$28.75

1978 to 1985 5 Cylinder Diesel 75 C Thermostat for Better Cooling

Your diesel should run between 80-85C. It if runs over 95C, it is not healthy for the engine. This might cool it down 5C unless you have major problems like cylinder head crack or leaking head gasket.

This OEM thermostat from another engine fits perfectly in the OM617 diesel engine. It does require a special rubber seal, which we include here.

On Demand Video
$9.99

Replacing the W123 Turbo Diesel Firewall Mount Throttle Bushing - On Demand Video

This is an easy DIY job. Full video instructions here. You might want to inspect your throttle linkage today

In this 13-minute instructional video, Kent will walk you through the steps of inspecting and replacing the round throttle shaft bushing in your W123 turbo 300D, 300CD, or 300TD. Watch the YouTube video below for an introduction.

$39.75

Late W123 240D 300D 300CD 300TD Diesel Firewall Throttle Bushing Upgrade

For MOST 1981 to 1985 models. Failure causes loose throttle linkage and LACK OF POWER. Inspect yours today! Comes with Kent's video installation instructions.

We are currently the only good source to replace your aging or broken throttle linkage ball-bushing on your later W123 diesels. This mounts on the back side of the rubber throttle shock bracket on the firewall right at the back of the engine.

$13.75

W123 W126 OM616 OM617 Diesel Motor Mount 8mm Heavy Duty Long Socket

Made in Taiwan. Very hard steel. This is a sharp edge impact socket for maximum strength. For most diesels 1977 to 1985 except W116 300SD (requires 10mm)

Removing the front rubber engine mounts requires getting under the car and going up inside a hole in the subframe to remove the main bolt. And it can be a bear! I don't know who they hired to tighten these at the factory, but he must have been a brute.

$345.00

1978 to 1984 OM617 New Assembled Replacement Turbocharger

All new parts. We assemble and check fit and tolerances. Kent's written instruction manual included. WARNING: Only fits engine with Garrett turbos. Will not work with KKK turbochargers.

New in 2023. This is "almost" ready to install. You will need to install some parts from your existing turbo charger once you remove it from the engine. Watch the video below for a full explanation. 

$151.25

OM616 OM617 Non-Turbo Diesel Front Crank Seal Replacement Combination Kit

Save $20! For 1968 to 1983 NON-TURBO 220D 240D 300D 300CD 300TD 1968 to 1983 with FREE PDF and VIDEO Instructions + 2 Pullers as shown.

Includes Kent's four detailed videos on every aspect of this job! This is our combination kit for DIY installation of a new front crank seal in an OM 616 four-cylinder and OM617 five-cylinder NON-turbo diesel engine. The price if purchased individually is $174.00.

On Demand Video
$6.99

1961 to 1985 Diesel Engine Pre-chamber Removal - ON DEMAND VIDEO

The correct special tools are required to do this job without damage.

In this 14 minute instructional video, Kent will share with you the tools you will need along with some tips and tricks that will help you successfully remove a prechamber from the cylinder head. This can be done with the head on or off the engine.

$154.00

OM617 Turbo Diesel Engine Front Crank Seal Replacement COMBINATON Kit

Save $20! Includes the seal install kit plus the two pullers you will need to complete this job successfully. For all 5-cylinder turbo engines 1978 to 1985

Includes Kent's four detailed videos on every aspect of this job! This is our combination kit for DIY installation of a new front crank seal in an OM617 turbo diesel engine. Price if purchased individually is $174.00.

$62.00

1981 to 1985 5 Cylinder Turbo Diesel Pre-chamber - USED

LARGE hole design ( see picture below ) For W123 Turbo 300D, 300CD, 300TD and W126 300SD

Damage to these is becomming more common as they engines age. If your fuel injectors are not firing fuel properly the ends of the prechambers cac burn right off causing all sorts of "weird" engine performance problems. 

$18.50

Modified 22mm Open End Wrench for Oil Cooler Fittings

Helps to prevent damage to valuable oil cooler. See video below. Also multi-purpose uses.

This custom-made thin head wrench by Kent Bergsma can save the day and your pocketbook.  It is very important that you hold the fitting base on the oil cooler when removing the oil cooler hoses. A regular 22mm wrench is almost always too thick and can also cause damage.

$4.75

All Models Radiator Hose Chafe Protector - Heavy Duty

Don't let a hose rub up against the engine or radiator. Easy install with zip ties included if needed.

This is a great solution to what is sometimes a nagging problem. This heavy duty and flexible and adjustable plastic spacer can be put on the top or bottom radiator to prevent chafing in and area where it might come in contact the the engine or the radiator.

$96.50

1977 to 1985 Diesel Engine Critical Coolant Service Kit

So often neglected - yet critical to preventing pre-mature or catastrophic engine failure!

Why is this so important? It is primarily due to the age of these cars now and the fact that lurking problems can be hidden from visual inspection. There is not ONE diesel that Kent has looked at in the last five years that does not need this service! Even ones with under 150,000 original miles.

$105.00

1968 to 1987 4, 5 and 6 Cylinder Diesel Engine Prechamber Removal Tool

61x tool: For OM615, OM616, OM617, and early OM 601 and OM603 through 1987 only.

Version 4 update 2/22: New color and style but still does the same job. This is one of the key tools you will need to remove stubborn pre chambers from the cylinder head of your old diesel engine.

$78.75
Currently out of stock.

615 616 617 Early 601 and 603 Diesel Prechamber Collar Nut Torquing Tool V2

Version 2 tool available December 2021, The ONLY way to remove and install a collar nut without damaging it!

Tightens and Removes Collar Nuts on 220D 240D 300D 300CD 300TD 300SD 300SDL 190D 2.2 1969 to 1987. Works on most Mercedes diesel engines up through 1987 only.

On Demand Video
$8.99

Diesel Harmonic Balancer Installation Tips and Tricks - On Demand Video

Did you forget to mark it before removal? Can't see down there to align it properly? Not sure about the bolt and washers? This video will HELP!

This video ONLY covers some of Kent's "tips and tricks" on installing a harmonic balancer back onto the front of the crankshaft on an old Mercedes engine. The specific procedure was filmed while doing a front crank seal replacement on a 1983 240D.

$19.00

40 Piece Silicone End Cap and Plug Set - Amazing Uses!

Push them over a hose and they act like a sealing end cap. Turn them around and push into a hole to act as a plug. Cut in half - use one piece for a splice between hoses.

We starting using some of these to plug brake lines while changing out calipers. Then we started using them on fuel and oil hoses. Now we are using them all over the place and keep finding new uses for them on a monthly basis. These are a MUST HAVE! Watch the video below to become a believer!

$68.50

Kent's Custom Gas Engine Front Crank Seal Race Removal Tool

For most 4 cylinder, 6 cylinder and V8 engines from 1963 to 1985. Made to remove the race on the end of the crankshaft when replacing the front crank seal.

Kent modified this puller and developed a procedure to remove the front crank seal race so the job could be affordable from the DIY mechanic. This costs less than half the cost of the factory tool.

$4.20

Diesel Compression Tester Replacement Sealing Washers

You will need extras if you plan to do multiple compression tests

When doing a compression test you must properly seal the inner surface of the pre-chamber with the fuel injector hole adapter. Copper washers work the best for this to ensure a 100 percent seal. Do not use the engine's heat shield washers.

On Demand Video
$3.99

Diesel Compression Test Set-Up Tips - On Demand Video

Applies fully to 1978 to 1985 turbo diesels and applies partially to other Diesel engines from 1961 to 1985

In this video Kent will share some set up tips as well as explain what is in the compression tester and an overview of how it is used. 

On Demand Video
$12.99

Front Crank Seal Race Removal and Replacement - On Demand Video

Applies to many gas and Diesel engines from the 1960s through the 1980s

This video will show you how to remove the front crank seal race using the factory tool and using Kent's custom puller. It will also demonstrate a very easy way to install a new replacement race before installing a new seal.

$62.50

Kent's Custom Diesel Front Crank Seal Race Removal Tool

For OM615 OM616 and OM617 Diesel engines from 1968 to 1985. Made to remove the race on the end of the crankshaft when replacing the front crank seal.

Kent modified this puller and developed a procedure to remove the front crank seal race so the job could be affordable from the DIY mechanic. This costs less than half the cost of the factory tool.

$3.85

Air Filter Cover Wing Nut x 2

Fits many gas and diesel models in the 1970's and 1980's with center stud in air filter housing

Two new wing nuts. These have wider wings so they are easier to loosen and tighten. Replace the nut that most people install after the wing nut has been lost!

On Demand Video
$18.99

How to Do a Compression Test on Your Gas Engine - On Demand Video

Example showing 450V8 engine but same principles apply to all gas engines 1960 through the mid 1990s

In this 28-minute instructional video Kent with show you how to do a compression test on your own Mercedes gas engine and explain how to interpret the results. It is very important you do this procedure BEFORE "throwing" parts at your engine trying to fix a performance problem.

On Demand Video
$3.99

Spark Plug Do-It-Right Installation and Cleaning Tips - On Demand Video

These instructions will apply to all gasoline engines that use standard sized spark plugs.

You might be surprised to realize you spark plug holes need cleaning - and yes some REALLY need cleaning! This 5-minute video will demonstrate Kent's method of cleaning the threads in the cylinder.

$18.75

1977 to 1985 Diesel engine Idle Speed Adjustment TOOL

Quickly adjust the idle speed on OM 616 and OM 617 Diesel engines in the late W116, W123 and early W126 (300SD). Video instructions included.

Diesel idling too fast. Diesel idling too slow. Diesel shaking at idle. Transmission jerks with shifting from Park to Drive. These are some of the symptoms that might indicate your engine's idle speed is not adjusted correctly.

$31.75

1977 to 1985 Diesel Engine Idle Speed Digital Tachometer

Can also be used to test other gas and diesel engines. You must paint a bright mark on the front pulley to get an accurate reading.

Diesel idling too fast. Diesel idling too slow. Diesel shaking at idle. Transmission jerks with shifting from Park to Drive. These are some of the symptoms that might indicate your engine's idle speed is not adjusted correctly.

On Demand Video
$7.99

Cleaning and Polishing Your Aluminum Valve Cover to Look Factory Fresh - On-demand Video

This video will show you how to get the original look - not the highly polished look when using a polishing compound

PLEASE read the instructions below carefully on how you will view this video.  It is NOT downloaded to your computer and viewing is NOT automatic. You must be logged in at Mercedessource.com and you MUST click on "my account".

$24.75

All Models Rubber Exhaust Hanger (Donut) Easy Install Tool w/ 4 Hangers

4 "Donuts" included. After 20 years of scraped knuckles... FINALLY a good solution that makes install a "snap."

Hard to believe we took so long to come up with this tool. It was Gerson's genius that made it happen. The secret turned out to be the hook that keeps the tool in place while stretching out the rubber donut. Wow! What a cool tool.

$19.75

OM616 OM617 Thermostat Leak Prevention Install Kit

For 4 and 5 cylinder Diesel engines 1977 to 1985 except 190D

When replacing the thermostat in your order diesel you may end up fitting a lot of corrosion. This kit will help you make sure you do not have any leaks when you install the new thermostat and will prevent corrosion of the housing bolts in the future.

$29.50

Cooling System Leak Detection Radiator Cap Conversion for Brake Bleeder Tank

Custom made in our shop. Allows you to use our brake bleeder tank to also pressure test the cooling system on most models 1973 to 1995 ( see design of metal cap to confirm )

Have you ever had a hard time finally a very small coolant leak? Do you find yourself adding small amounts of coolant but can not see any leak? Is there a funny smell coming from inside your Benz when you run the heater?

On Demand Video
$18.99

Setting Up Mercedessource Coolant System Pressure Tester Cap - On Demand Video

Video instruction that comes free with the purchase of your custom radiator pressure testing cap and hardware

In this video, Kent will walk you through the steps needed to convert your older Brake Bleeder tank to one that can continue to bleed brake systems as well as pressure test radiators and cooling systems.

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