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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.

$74.50

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.

$46.00

Gas Engine Compression Test Kit with Video Instructions

MOST IMPORTANT STE[P when doing an engine physical exam. Applies to all gasoline Mercedes passenger car engines from the 1950's through the 1990's - Free extra video and supplies included.

Doing a compression test is one of the best ways to determine the internal health of your gas engine. This is a primary test for doing a physical examination.  You want to do this on any old Benz before spending a lot of money to get the engine running right or before restoring your car.

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.

$19.75

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 is 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.

$33.95

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".

$22.00

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.

$34.95

Cooling System Leak Detection Radiator Cap Conversion for Brake Bleeder Tank

UPDATE: 6/25/25. NEW design. Does not require adjustment. 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.

$31.20

Diesel Engine Valve Adjusting Lower Nut x 2 - Used

Last set left. ONLY ORDER ONE. For older OM 615 616 and 617 diesel engines with adjustable valves. No Longer Made. NLA

This price is for TWO nuts as shown. If you find you can not accurately adjust one of your older diesel engine valve clearances it usually means the threads on the lower adjusting nut are stripped. New ones are getting harder to find so we are offering good used as an alternative.

$18.75

Mercedes Diesel Engine and Transmission Bag of Original BIG Bolts -USED

Bag of Bolts from Buster for 1976 to 1985 W116, W123 and W126 Diesel Cars.

Please, what you see is exactly what will receive. These are mostly from OM616 and OM617 diesel engines and related transmissions and may NOT all be from the same vintage or chassis model. Study the picture carefully. Only one exactly like this. BUSTER

$79.50

1982 and 1983 W123 240D Diesel Engine Mount Arms - USED

ONLY fits years listed for U.S. models. ONLY ONE SET AVAILABLE

Good used motor mount arms as shown. Good bolt threads. No galling or cross threading. Only one  set is available. Will need some cleaning when you get them.

$18.75

Turbo Diesel Cylinder Head Bolt Removal Tool - 12M Star Bit (Triple Square)

1978 to 1985 5 Cylinder Turbo Diesel Engines 300D 300TD 300CD 300SD

If you have worked on 5-cylinder 617 turbo diesel cylinder heads before you already know how important it is to have the correct socket for the "triple square" cylinder head bolts. This socket is a must to properly remove and re-torque those bolts.

$78.50

Older Diesel Internal Engine Cleansing Kit

Must be done using separate fuel tank. Cleans injection pump, fuel injectors, pre chambers, combustion chambers and helps reseal piston rings. Will not work on extremely worn out engines.

UPS ground shipping only. Can not be shipped internationally. Rather than try to explain what this kit does and how it does it we are going to ask you to watch the video below if you have not already done so.

$69.50

Late OM616 OM617 Power Steering Pump Leak Front and Rear Reseal Kit

Now for both ZF and Sperry pumps. Fits later W123 4 and 5-cylinder diesels and W126 300SD. Some 380SL.

For later 240D 300D 300CD 300TD 300SD Models.  All the parts in this kit are the same for both pumps, except the rear seal. Rather than offer two different kits, we are going to include the seals for both pumps.

$46.50

Early OM616 OM617 Power Steering Pump Leak Reseal Kit - LARGE SEAL

Fits early W123 4 and 5 cylinder non-turbo diesels and W116 300SD with cast iron pumps ( watch video before ordering!!!)

The seal in this kit is out of production. Only small quantity left. For EARLY 240D 300D 300CD 300TD and W116 300SD Models. Usually up to 1980 BUT YOU MUST LOOK AT YOUR PUMP BEFORE ORDERING! WATCH KENT'S VIDEO BELOW. You have asked for it and we have delivered again.

$16.75

OM616 and OM617 Diesel Engine Water Pump Bolt Upgrade Kit

Solve the problem of rusty pump mounting bolts once and for all - Go stainless AND seal them from inside water!

Kent finally went to work to solve the problem of rusty water pump mounting bolts. Once the problem was studied carefully the solution became obvious. Watch the video for a full explanation and partial instructions below.

Kit contents:

$188.00

OM616 and OM617 EGR Valve - Excellent Condition - USED

Tested - opens and holds vacuum - snaps shut. 1980 to 1985 4 and 5-cylinder diesel engines 240D 300D 300CD 300TD 300SD

Good used working EGR valve. HARD TO FIND. The valve opens and closes appropriately and holds a STRONG vacuum.  Hard to find. Failure of this unit can cause excess smoke, poor idle, and/or rough shifting. Easy to replace. NO LONGER AVAILABLE NEW.

$14.80

Early V8 and Diesel Engine Rotation Socket and Extension

27mm six point socket with 3" extension just the right length to fit into the front pulleys and clear the radiator on most early 6 clyinder, small V8 and diesel engines from the early 1960's up to 1985

For a number of maintenance operations, you need to be able to turn the engine over by hand. This includes valve adjustment, timing chain replacement, injection pump timing on diesel engines, checking and setting internal engine timing, draining the torque converter, and others.

$28.00

Early SLS Self Leveling Engine Driven Pump Floating Coupler

This is the "cog" that drives the hydraulic suspension pump on W116, W123, W201 16V, and W126 chassis with self leveling suspension

This is the part that more often than not gets lost when the SLS pump is removed from an engine for a long period of time. If you are trying to return the system to original after someone has removed the pump you most likely will need this part.

On Demand Video
$3.99

Making Certain the Turbo Inlet Elbow Seals Stay in Place - On Demand Video

WARNING: Inlet air leaks at turbo can shorten engine life! Modifying the plastic elbow assures tight seal

This is a BIG problem! Failure to fix it can shorten engine life by allowing dirt to enter the combustion chambers thus damaging the piston rings which lead to low compression, poor fuel economy, hard starting, high oil consumption and loss of power.

$75.00

W123 Turbo Diesel Engine Shock and Mount - USED

Fits 1982 to 1985 300D 300CD and 300TD - Right or left side.

Excellent used functioning engine shock with an acceptable rubber mount. The rubber mount is very solid, and it is still stiff and intact. This fits the right or left side of the engine on the 123 5-cylinder turbo diesel engines only. The two lower rubbers with washer and nut are NOT included.

$12.75

1977 to 1985 Diesel Fuel Shut Off Inspection and Switch Protection Filter

Includes installed vacuum hose as shown (see video for installation instructions)

Connect this small filter with attached hoses to the back of the injection pump and to the brown plastic vacuum line going to your ignition switch under the dash. The filter will do two things. 1. Help to trap oil coming out of a leaking shutoff valve before it gets to your ignition switch. 2.

On Demand Video
$12.99

Super Extreme Engine Compartment Detailing - On Demand Video

This is over the top detailing. Watch Kent perform magic on his 560SEC engine compartment. 45 minute long instructional video

Want to try to make your car's engine and engine compartment look like it just came off the showroom? Would you like detailed information on the chemicals, brushes, tools, and procedures Kent uses to get his engine compartments looking so nice?

$13.95

Lubro Moly Diesel Hi Test Fuel Additive

VERY LOW INVENTORY

Lubro Moly Diesel hi test fuel additive that does far more than just add lubrication to the fuel. Formulated for the new low sulfur diesel fuel. Contains an additive against injection pump and injector wear.

PDF
$7.95

Pre-Glow Systems Tips, Quick Tests and Upgrades - All Diesels 1960 to 1993 Download

Manual by Kent Bergsma: Book 5 of a 5 Book series

During his years of working on diesel engines, Kent has learned a few things about glow plugs. Some he learned the easy way and others he learned by “pain and suffering.” If misunderstood or improperly maintained, glow plugs can be the “achilles heal” of a diesel.

PDF
$6.95

Pre-Glow Parallel Systems Testing 1978 to 1993 by Kent Bergsma - Download

Manual by Kent Bergsma: Book 2 of a 5 Book series

This book explains how a parallel pre-glow system works and how to properly test it using inexpensive electrical testing equipment. If your PENCIL style glow plugs are not working properly, you need to find the cause BEFORE you start buying parts.

PDF
$6.95

Diesel Pre-Glow Series System Testing 1960 to 1979 by Kent Bergsma - Downlaoad

Manual by Kent Bergsma: Book 1 of a 5 book series

Book 1 explains how a series pre-glow system works and how to properly test it using inexpensive electrical testing equipment. If your glow plugs are not working you need to find the cause BEFORE you start buying parts. This is something you can do yourself.

On Demand Video
Removing the Cylinder Head to Diagnosis an Overheating Diesel - On Demand Video
$10.99

Part 2: Diesel Buyer Beware - Cylinder Head Gasket Failure and Removal Woes - On Demand Video

Is it really only "just a head gasket?" Kent will remove a cylinder head to illustrate the myth.

When an engine is both overheating and losing coolant, you first want to exhaust all possibilities that the cause is something simple or inexpensive to repair. It is possible it might just be a stuck thermostat with a faulty water pump leaking coolant at the same time.

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