Processors and heat sink fans will always need to have Silicon paste applied in between them when being installed. After dis-assembly for cleaning, you will find the paste between to have hardened and have breaks, some stay on the processor and others stick to the heat sink. These will have to removed and the surfaces cleaned well with a cotton bud dipped in rubbing alcohol.
When Silicon paste is not applied during re-assembly, chances are the computer will turn off on its own in a short while. This is because the processor has heated up and can not be cooled down by the heat sink fan.
In applying Silicon paste, it should be well spread out evenly on the surface of the processor. About a millimeter thin film of the paste should do the work to help the heat sink cool down the processor. While too much paste can drip down the processor and could ruin some of parts of the computer motherboard.
Almost all, if not all, late model printer cartridges have the print heads and contacts integrated in them. So, if you replace an empty cartridge not only do you get a new fully inked one with a new set of contacts and print head. Unlike earlier models, the printer heads were part of the printer assembly and not in the cartridges themselves. Once worn out, most of the time the print head could not be replaced.
With the printer cartridges now, especially those that can be or are being refilled, it is frequent that the printer would show an error that the cartridge is not being recognized or improperly installed. What actually happens is that the contacts are not clean or even smudged by ink. The reason why the printer could not recognize it.
It would be good to try, as remedy, to clean the contacts at the cartridge with cotton by softly wiping it. If the contacts seem dull or have a film over them, use a pencil eraser to clean the contacts much like erasing pencil writing. It often works because contact surface is renewed and can be detected by the printer. This will save a lot of money instead of buying a new printer cartridge.
The usual tool in mind to loosen the bolt of a crankshaft pulley is an impact wrench. Many though have not been successful in using them. There are other methods that can be used to loosen a crankshaft pulley bolt.
One quick way to do it is fit in a socket or box wrench (usually 19mm size) and let the other end rest against something fixed and sturdy where the engine would rotate. The starter then could be 'flicked' several times until the bolt loosens up. Before flicking the starter make sure that the high tension wire to the distributor is removed so the engine will not run.
When doing this method, make sure no one is around or near where the crankshaft pulley is. There is a tendency for the wrench to fly-off when the crankshaft pulley bolt comes loose.
