Bellingham Auto Repair

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Category Archives: Tech Tips

M116.690

M116.690

Engine going back together The left bank cylinder head on torqued down and the right bank gasket is in place. The double roller chain in looped through all the rails and sprockets under the timing cover. The slack is all on the left side but was easily fed through when the right head and cam were installed

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Tech Tips

Yes there are some single roller chain M116 engines still around

Yes there are some single roller chain M116 engines still around

We’ll be up grading to the double roller chain

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Tech Tips

Solution to Mercedes Benz ML water leak

Solution to Mercedes Benz ML water leak

Does water leak into the floor of your Mercedes Benz ML (163) chassis? Master Auto Tech may have the solution to your problem Fixing the Mercedes ML water leak

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Tech Tips

Up Date on the @.3-16 project car

Off With It’s Head

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Tech Tips

How does the Engine management know?

So the air pump is not accomplishing it’s task of heating up the three way catalyst. How does DME (Digital Motor Electronics) know any way? Programmed into the computer is a self test of the air pump. Each time the car is started DME at some point in the drive cycle will turn the air pump on to see if it’s working. How it sees is interesting. Part of the fuel management system are oxygen sensors or on newer cars AF (air/fuel) sensors or broad band oxygen sensors report back to DME. By sensing the amount of oxygen in the exhaust gases these sensors allow DME to make adjustments to the air fuel mixture going into the engine for the most efficient performance under all conditions. The O2 sensors also tell DME if the air from the air pump is reaching the catalyst. If the secondary air injection system is working properly DME should see a drop in voltage in a conventional O2 sensor. On the newer A/F sensors the technician will need to access fuel trim data to see if the ... read more

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Tech Tips

Changing Vehicle Battery in Todays High Tech BMWs

You might think replacing a battery in a late model BMW is a simple matter. Just swing by the local tire store and swap it out, right? In reality you may get some life from even the best battery this way but still not get your money’s worth. When replacing a battery with anything but the exact same size and rated battery the vehicle must be reprogrammed. For instance if the vehicle is only driven on short trips or not driven often, the white wet, acid and led plate batteries can tend to fail. Because of the high electrical demands placed on these vehicles upgrading to the Black Absorbent Glass Mat (AGM) batteries may be desirable. While some after market systems allow programming individual modules the BMW GT-1 and SSS system does not. After programming, the new battery must then be electronically “registered.” By the way the technician can look in your network and determine how often and how far your vehicle has been driven as well as if the battery in the car has bee ... read more

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Tech Tips

More from our BBJ Infomercial on Tires

My next topic came to me some time ago in dramatic form. The shelf life of tires was featured on an ABC News info drama. I choose to leave the fearful drama aside but think it’s a topic worth noting. The video can be found on ABC’s website. I broach the topic for the Bellingham Business Journal with the help of our ever present inquisitive customer. Q: My father in law asked me how old my new tires are? I just bought them they are new, right? A: Not necessarily. Like milk, eggs or corn chips, tires have a “best if used by” date printed on them. Only outdated tires could be a lot more hazardous than tainted treats. On the side wall of every tire is a sequence of letters and numbers beginning with the letters DOT. For example: DOT B97R FW6X 2202. The numbers at the end of our example are the week of the year the tires were manufactured. In our example the tires were manufactured in the twenty second week of two thousand two. Tires older than six years may be unsa ... read more

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Tech Tips
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