Benz Vacuum Pump

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Benz Vacuum Pump
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With the market flooded by products that claim to cut down your mileage by 20% or 30% are you confident that you know the products that can be trusted and those that cannot be? EPA (Environmental Protection Agency) has tested a number of such devices against various standards and determined a set of devices that actually save gas and does not affect emission standards adversely. Let's look at the first set of such devices that you may consider using. Note some of the products may not be available in the market at present. EPA however has a legal disclaimer for all such products as follows:

"...certain conclusions about possible gas savings by testing the product or by evaluating the manufacturers' own test data" have been reached by EPA. Remember that EPA never endorses a product.

Lubricant - Petromoly:

This product was tested in January 1999. Find below the observations by EPA for Petromoly: "Use of PetroMoly in the single test vehicle demonstrated the following when compared directly to the stock configuration test using a basic 5W-30 SAE motor oil as recommended by the vehicle manufacturer:

o There was a two percent improvement in fuel economy. On the city drive test, there was a five percent increase in oxides of nitrogen (NOx), a nine percent reduction in hydrocarbons (HC), and a ten percent reduction in carbon monoxide (CO) when compared to the stock configuration test."

o There was a three percent improvement in highway fuel economy."

Data submitted by organizations other than EPA have also shown significant increase in mileage and up to 13% decrease in Nitrogen Oxide. So yes, this is product that is worth a try.

PASS Master Vehicle Air Conditioner

Let's look at how this device works:

o It essentially comprises of a vacuum switch that senses drop in air pressure in the engine whenever there is an extra demand of power.

o Such power demands occur when the vehicle is climbing uphill or accelerating fast.

o The switch then opens the circuit that provides power to the compressor clutch thereby making the compressor go idle.

o This in turn decreases up to 15 Horsepower load from the compressor and helps the engine accelerate without any drag.

In 1980 this device was tested. Those who used air conditioner frequently found up to a 4% increase in fuel economy on using this device.

Morse Constant Speed Accessory Drive

To take the place of fixed ratio water pump drive, the constant speed accessory drive was introduced in the market. Why would you want to replace the fixed ratio water pump? Well, with the increase of the RPM (rotation per minute) of your engine, the speed of your air conditioner increases in case of fixed ratio water pumps which leads to wastage of extra power.

However the constant speed accessory drive dubbed as the variable ratio water pump reduces the temperature within the engine even when the engine is climbing a hill. Tests conducted by EPA in 1976 revealed that gas emission was lower and there was a 6% increase in fuel economy.

Gregg Hall is an author living on the Emerald Coast of Florida. Now that you know a little more about gas saving products be sure that you get gas saving devices by going to http://www.nsearch.com

Brake it Up!

Brakes perform a very vital role in your automobile. Yes, it is like saying your life depends on your brakes. They control the stopping and the running of your vehicle. When a sudden stop is needed to avoid a crash, the brakes do the most important task. They also play the most essential part while controlling the speed of the vehicle. So they should never be taken for granted from the repairs up to the maintenance.

Having the “know how” in brake maintenance saves time, effort, and definitely, money.

There are certain things to remember when doing a brake job. For example, on the brake temperature, you must know the right fluid that will not deteriorate you brake system. For cars which are not subject to high brake temperature, silicon fluid is applicable. This fluid will not damage the paint, nor absorb water, nor allow corrosion.

However, silicon brake fluid constricts at 360 degrees Fahrenheit. In effect, this causes the pedal to feel squishy. In this case, silicon brake fluid is not advisable for racing purposes.

Keep in mind that water gives low temperature boiling and the oil eats the rubber seals. So never get or remove any water or oil in the brake fluid. Make sure to regularly check and change the brake fluid in order for the moisture to get out of the brake system. A problem is being implied by a change in the level of fluid.

Air must not enter the brake system. If in case of any, it must be immediately removed. A squashy pedal is an indicator that air has entered.

Simultaneously leak out dual master cylinder systems. Before connecting the brake lines, it is necessary to leak out the cylinder. Slightly open the bleed screw once the lines are already linked. Have this done on the front and the rear brakes on one side of your auto mobile. Then, put one end of the vacuum hose on the nipple of each bleed screw and the other end in a jar. Until the brake reservoir is almost empty, gently pump the brake pedal.

An alternative way of leaking out or bleeding is through the use of a hand or manually operated vacuum pump that is attached to the bleed screw.

To push the bubbles out of their hidden places, you can use a turkey buster to pump brake fluid into the bleed screw. And to let the bubbles out, tap on the calipers with the use of hammer. By this way, the bubbles can exit with the fluid.

All these tips and more which you can find from your owner’s manual will guide you in doing some brake job.

The next thing to do is to break in your new brake pads. This can be done by braking and allowing alternately the brakes to cool down. This is for the reason that brake pads must be heated uniformly.

Then, in the case of your Mercedes, examine the Mercedes brake boosters through pumping the pedal a few times. Do this slowly and with engine off.

To finally check whether the brakes are ok or not, press the pedal. Then start the engine. If the pedal drops as the vacuum develops in the booster, then it goes to show your brake system is doing fine.

About the Author

Dwyane Thomas is a part time cook and full-time auto-enthusiast. This 31-year old Civil and Environmental graduate is a consultant at one of the engineering firms in Pennsylvania.

1984 Mercedes Benz 300SD need help rebuilding vacuum pump can not find diagram to install the repair kit?

I have never done one but with a few fairly common tools you can usually do just about any minor repair. First, remove and clean the pump. I still use gas in a pan and a parts brush, although you need to remember gas is volatile. Dry with compressed air. Prepair a clean work area and disassemble the pump laying out the parts in order as you remove them. Be very careful to keep things in order as this is your "blue print" for reassembly. After things are all laid out, clean the individual parts and replace the worn / old parts with the new parts from the kit. Then simply reassemble things in the reverse order. You can do even automatic transmissions with this method. Just go slow and keep things in order. You could also take it to a good auto repair shop and pay someone to do it. Maybe buy a rebuilt?

1981 Mercedes-Benz SL from North America - Comments
What things have gone wrong with the car? Fuel pump relay went out this year, and since it's a multi function relay, the windows no longer work. Car drains the battery in 24 hours.

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