Removing the pulleys in the engine of a modern car is directly associated with unscrewing the bolts that secure them. And this is where the main difficulty lies for many - how to unscrew the pulley bolt if it “does not want to” turn away? And how to do it correctly, so as not to harm and not incur additional problems.
Necessary
- - cap key or head;
- - a hammer;
- - two chisels;
- - a balloon key from the truck
Instructions
Step 1
Take your tool choice seriously. It should be a branded set from a well-known company or, at worst, domestic. But not Chinese. In work, use only socket heads and spanners. Try not to use carob.
Step 2
In the most common cases, maximum force is required only at the beginning of loosening in order to move the bolt from its place. The amount of force applied is much greater than the force applied to tighten the same bolt. Using open-end wrenches in this operation will damage the bolt heads and cause them to break off.
Step 3
If you do not have the strength to push the bolt out of place, take a hammer and tap the head of the bolt with it from above without putting the wrench on it. If access to the bolt is difficult, use a metal rod of suitable length, such as a long M10 bolt. Be careful not to damage the head when tapping.
Step 4
If you have an assistant, join forces. Place a spanner over the head of the bolt and begin to loosen it. The assistant must hit the bolt head with a hammer.
Step 5
Never hit the side of the wrench with a hammer to briefly increase the unscrewing force. At the same time, such actions do not always lead to the expected result, but they always harm not only the tool, but also the bolt head.
Step 6
If the splines on the bolt head are flared, use two small chisels. One must be sharp and correctly sharpened, the other must be completely dull. Using a sharp chisel, tap tangentially to remove the shavings from the bolt head around the circumference. If the shavings will be easy to remove, and the bolt does not move, start hitting the formed notches with a blunt chisel.
Step 7
On some cars, the crankshaft pulley bolt is 36 or 38. Keys of this size are almost impossible to find. In this case, take a wheelblock from a truck, for example a ZIL-130. Insert the plates of the required thickness inside it to reduce the size of the key. For example, a 42 key requires two 2mm thick plates to be inserted and sealed with sealant to make it 38.
Step 8
Before looking for the big head and modifying the wheel wrench, check to see if the bolt needs to be removed. On many imported motors, the pulley block is secured with 6 or 8 bolts with internal hexagons. The unit can be removed without unscrewing the central nut.
