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On Demand Video
$12.99

How to Replace the Older V8 Distributor Cap and Rotor - On Demand Video

Don't make the common mistake! Applies to all M116 and M117 V8 engines from 1970 to 1991

Replacing a distributor cap is easy right. No problem?? If it were I would not get so many emails and why the engine won't run right after changing the cap and rotor. This is a short eight and a half minute video but the tips I share could save you some big headaches.

$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.

$108.00

1990 to 1995 Diesel OM602 and OM603 Prechamber Removal Tool

Heavy duty slide hammer and special fitting included.

This tool will allow you to remove a cylinder head pre-chamber on a 1990 to 1991 350SD 350SDL (126 chassis), 1990 to 1993 300D 2.5 (124 chassis), and 1992 to 1995 300SD / S350 (140 chassis). The special black fitting attached to the slide hammer is custom made in our shop.

$18.90

Diesel Engine Valve Adjusting Lower Nut x 2 - Used

Only 2 sets left. For older OM 615 616 and 617 diesel engines with adjustable valves

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.

$98.00

OM 617 Turbo Diesel Water Pump Housing w/ Balance Pipe - USED

For 1981 to 1984 5 cylinder turbo diesel models only - W123 and W126 300D 300CD 300TD 300SD

Good used part as shown.  There are no stripped bolts in the housing. Even the balance tube banjo bolt threads are super. Hose nipples have a couple pits in them. Should be ok as is or you can sand and fill the pits with JB weld. 

$18.75

Turbo Diesel Cylinder Head Bolt Removal Tool - 12M Star Bit

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 star 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.

$37.50

Late OM616 OM617 Power Steering Pump Leak Reseal Kit - SMALL SEAL

Fits later W123 4 and 5 cylinder diesels and W126 300SD with aluminum pumps ( watch video before ordering!!!)

For later 240D 300D 300CD 300TD 300SD Models. Most after 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.

$18.00

1981 to 1985 W123 W126 Passenger Side Motor Mount Metal Shield - USED

Fits right side 1981 to 1985 turbo diesel models only . Cover plate be used on left side but some models will require trimming to check engine shock mount.

The motor mount shield may not be the exact one shown. It may be painted or original. No cracks. Not perfect but very usable. If you leave this off your rubber mount will fail much quicker. 

$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:

$185.00

OM616 and OM617 EGR Valve - Excellent operation - USED

Tested opens and holds strong vacuum. 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 properly and holds a strong vacuum. Hard to find. Failure of this unit can cause excess smoke, poor idle, and/or rough shifting. Check to see if yours holds vacuum. Easy to replace.

$12.80

Early V8 and Diesel Engine Rotation Socket and Extension

27mm / 1 1/16" six point 3 in deep socket with short 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.

$179.50

M117 V8 Timing Chain and Upper Guide Rail (3) Replacement Kit with Instructions

Prevents Catastrophic failures on 4.5, 5.0, 5.6 liter V8 engines from 1972 to 1991. NOTE: Oil tube clips and valve cover gaskets available separately

PLEASE NOTE: Manual(s) are now available in PDF format and are available for viewing when you log into your account at Mercedessource. No printed manuals are shipped.  If you own a Mercedes with the M117 V8 engine timing chain failure can really ruin your day!

On Demand Video
$16.99

M116 and M117 V8 Timing Chain Replacement Safety Tips - On Demand Video

Companion to my written instructions "Preventing Catastrophic V8 Engine Failure"

PLEASE NOTE: This is NOT a complete instructional video on how to install a new timing chain in a 1970 to 1991 M116 or M117 Mercedes V8 engine. Rather it is a collection of "tips" to help you prevent running into trouble when doing this job yourself.

$47.25

M116 V8 Timing Chain Upper Guide Rail Replacement Kit

Save your V8 regardless of mileage - DO this job if it has not been done in the last 15 years

For all 3.5, 3.8, and 4.2 liter V8 engines from 1969 to 1991 280SE 3.5, 300SEL 3.5, 380SE, 380SEC, 380SEL, 380SL and 420SEL. These THREE are the upper (and easily accessible) plastic guide rails that most often break due to age and heat.

$48.75

M117 V8 Timing Chain Upper Guide Rail Replacement Kit

Save your engine regardless of mileage if this job has not been done in the last 15 years

PLEASE NOTE: Manual(s) are now available in PDF format and are available for viewing when you log into your account at Mercedessource.

$3.25

M116 and M117 Valve Cover Bolt Copper Sealing Washers Set of 8

If you don't want leaks replace these every time you remove the valve covers

If you are a 1969 to 1991 V8 you should have some extras of these on hand. They are inexpensive and should be replaced anytime you remove your valve covers. The gaskets will keep a good seal longer than the bolt washers.

$29.75

M116 and M117 LATER V8 NGK Spark Plug Set of 8

Bosch plugs are currently NLA. These NGKs are currently the best solid copper core plugs you can get for the later 4.5, 3.8, 5.0, 4.2 and 5.6 V8's

These will fit all 1976 to 1991 4.5, 3.8, 5.0 and 5.6-liter V8 engines with Bosch C.I.S fuel injection.  PLEASE NOTE: These spark plugs have an aluminum end cap that does screw off. You will receive the plugs with the end cap installed.

On Demand Video
$9.99

M116 and M117 V8 Spark Plug Replacement - On Demand Video

Learn some tips to use and pitfalls to avoid - Do it yourself and Save $$$

One of the most often neglected easy and inexpensive maintenance items I see on gas engines. Why do people think that spark plugs will last forever or that it doesn't matter what type of plug is used! Aren' they all created equal?

$32.50

M116 and M117 V8 Valve Cover Service / Oil Leak Fix Kit

For all single overhead camshaft V8 engines from 1969 to 1991

This is a VERY common maintenance item on the older Mercedes V8 engines. If they are too old they will leak. If they are not put on properly they will leak. If you do any maintenance (ie, valve adjustment, clip replacement, timing chain, guides, etc), you should have this kit on hand.

On Demand Video
$12.99

M116 and M117 V8 Camshaft Oiler Tube Clip Replacement - On Demand Video

In these engines these are the cheapest parts that can cause the most expensive damage! - REPLACE THEM!

You can not believe how many problems Kent has seen over the years as a result of the camshaft oiler tube falling off inside the valve cover! It is held on by inexpensive small plastic clips and guess what happens after 15 to 20 years? Yes, that is correct.

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.

$9.80

Radiator Hose Block Off Clamps - Set of 2

Work on your cooling system without having to drain all the coolant

2 large style clamps to be used on upper and lower radiator hoses. Use these to replace your thermostat or water pump without having to drain all your coolant out of the radiator. Works on medium size coolant hoses also. 

$14.25

M103 6 Cylinder Gas Engine Fuel Injector Holder Rubber Seals

For all single camshaft 6 cylinder 260E, 300E, 300TE, 300CE , 190E 2.6, from 1986 to 1992

For these old 6 cylinder gas engines of the late 80's and early 90's Kent feels this part along with the injector o-ring seals could be one of the most overlooked maintenance items on these engines.

$13.95

M103 6 Cylinder Gas Engine Fuel Injector O-ring Seals

For all single camshaft 6 cylinder 260E, 300E, 300TE, 300CE , 190E 2.6, 300SE, 300SEL from 1986 to 1992

For these old 6 cylinder gas engines of the late 80's and early 90's Kent feels injector seals are one of the most overlooked maintenance items on these engines.

$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.

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