My BMW Bavaria has been overheating for several times now. I've been taking it to the dealer every time it does, and they already performed multiple treatments on it—from disconnecting the automatic fan to even boiling the radiator. However, the problem still kept on recurring. What should I do to keep it from overheating?
Overheating is a common problem to all vehicles, not only to BMWs. For Bavarias, it is usually an ailment for the six-cylinder type. If your car has been overheating regularly, all you need to do to recore the radiator with a larger core. Once replaced, you will see the benefits of having a larger core to keep your engine cooler. You don't need to waste your time, money, and energy for other solutions. All you need to do is to install a larger core.
I've been seeing a white smoke coming from my BMW Bavaria's tail pipe. Well, I'm not really sure if that's smoke or something else. I wonder if I need to buy a new head gasket. What should I look for?
You need to confirm if what's coming out of your tail pipe is smoke or steam. You can do this by holding out a tissue paper at the end of the tail pipe. If the tissue disintegrates, then it is not smoke but steam. If it is smoke, then it could be due to a burning brake fluid. This usually happens when your brake master cylinder has failed. You might also need to re-torque the cylinder head. Before even buying a head gasket, you need to do a compression test. If the test turns out to be positive, then you should replace your head gasket immediately. However, you might want to consider undergoing your vehicle to another test to detect if there is carbon monoxide in the radiator. If there is, then your head gasket has indeed failed and needs replacement.
I was about to adjust the valves of my vehicle, when I found something weird. I removed the valve cover, and found that the hollow screws to the oil pipe and the two seal rings were missing! I found one of the screws, and it was already worn out. What should I do to prevent this from happening?
The screws may have become loose due to age. It is best to replace them with a fresh pair to ensure that it will not wear out or appear missing again. Upon your reinstallation of the new parts, add a drop of Loc-Tite on the threads of the hollow screw. This is important to ensure that the screws have nowhere to go. It is also worth noting to always check your vehicle's screws for tightness as often as you can, or tell your mechanic about it. Failure to do so may cause you lots of money to have your components repaired.
There seems to be a leak coming from the differential of my vehicle. I wonder what started the leak, and what should I do about it.
If you find a small, unexplained leak, it is best to take a look at the machined hole near the drain plug. The leak could be due to a hole that was drilled too deep. To fix this, clean it first with alcohol then plug it with a rubber faucet disc. It would also help to coat it with epoxy.