This is the FIRST thing you should do on your D-Jet V8 engine. This is true when approaching fixing any older gasoline or diesel engine. If you don't do this, you will be guessing and spending money forever trying to get the engine to run right!
Product Details
This applies to the following models: 280SE 3.5, 280SEL 4.5, 300SEL 3.5, 300SEL 4.5, 350SL, 450SL, 450SE, 450SEL and a few others 1970 to 1975 ONLY. Summary of kit contents:
- Valve adjusting wrench
- Valve spring compressor ( needed to free up frozen ball socket adjusters)
- Valve cover gaskets
- Compression tester
- PDF instructions- One printable download
- Video instructions- Five On-demand detailed instructional videos by Kent Bergsma
The instructions are complete enough to enable you to do this yourself
When you are doing this basic health exam, since you already have the valve covers off and the spark plugs removed, you might want to change the spark plugs and replace the plastic oiler clips over the camshaft. Also, a remote starter switch is a real time saver when doing a cold cranking compression test. See related products below to order separately
Related Products:
Remote Starter Switch
This simple push-button switch with clip leads can be used on both gas and diesel engines. If you are not sure why your engine does not turn over when you turn the key , it can be used to test if your starter motor is working before looking into the ignition switch or neutral safety switch.
1970 to 1975 3.5 4.5 D-Jetronic Fuel Injection Pressure Tester w/ Video Instructions
Testing fuel pressure is a simple procedure on the D-Jetronic engines, but it is ABSOLUTELY essential. If your fuel pressure is off even a few pounds, it will dramatically change the fuel mixture, and your engine will end up running too rich or too lean.
Early 350 and 450 V8 Valve Clearance Adjusting Wrench for 17mm Ball Adjusters
Valve clearance adjustment should be done every 10,000 to 12,000 miles. Recently emails started coming in - "we can not find any valve adjustment tools for our earlyV8 - help!" Most companies are currently noting the old factory-style tools are no longer being manufactured, so we went to work to
Mercedes Early Gas Engine Custom Valve Spring Compressor / Valve Adjusting Tool
If you own one of the early Mercedes overhead camshaft engines from the mid-1950's up to the mid-1970s that have mechanical (non-self-adjusting) lifters this is a MUST HAVE tool! It does NOT work on the M110 twin cam engine.
Gas Engine Compression Test Kit with Video Instructions
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.
M116 and M117 EARLY V8 BOSCH Spark Plug Set of 8
These will fit all 1970 to 1975 3.5 and 4.5 V8 engines with D-Jetronic fuel injection (electronic). Do not use off-brand, platinum or any other "special" spark plug.
1960 to 1991 Ultimate Spark Plug Flexible Tool Set for 13/16" Plugs
This can be used on older 4, 6, and 8 cylinder gas engines up to around 1991 (end of W126). This works particularly well on the M116 and M117 V8s from 1972 to 1991. On some early V8s, you have very limited room to get to the rear sparkplugs. You can use the short extension.