Cars, after a certain period of use, will be worn out and damaged, so they need to be overhauled, in order to restore the original working modes. After using about 5-7 years, running about 60.000 - 80.000 miles, almost all car engines develop diseases such as consuming a lot of fuel, making strange sounds in the engine, leaking oil, loss of compression pressure ...
The residual gasoline mixture dilutes the oil in the crankcase and leaches the lubricating oil from the cylinder walls as one of the causes of car engine wear. Not only that, the engine of old cars with large tolerances also made cement rings, bushings and guide pipes also quickly corroded.
In this article Thanh Phong Auto Please share with you 6 things to consider when car overhauling. Subscribe to this article!
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1. Decisions before motor vehicle overhaul
When the after-sales service center receives, checks, and reports an error about your car engine, you will have to make an important decision: to repair part or overhaul it all. If the engine needs to be replaced, it will choose to replace the new engine or replace the used motor but it is still good.
Replacing an entirely new engine is often costly to the customer. So you can choose to replace a used engine but still good, bring repair and use again. However you may be at risk with this option.
Repairing or overhauling the old engine to match the original specifications is how many customers choose today. The price of new parts in engines and repair work is not too high.
2. Overhaul of old engine
If the engine is not worn out excessively or not severely damaged, overhaul does not cost as much as replacing it. You can save between 20% - 50% of the cost compared to replacing it. Tools used for overhaul are not too complicated, including: hand tools, leaf ruler, ring pliers….
When the cylinders wear out, the technician must conduct the barrel vortex. The xupap and the xupap mouth must also be revised to achieve a tight fit. Jobs that require expertise such as reviewing the surface of the machine lid, the core should be sent to processing shops. The rest of the cleaning dirt and lubricant you can do yourself with specialized cleaning solutions.
Another plus point when overhauling the engine is that you can control the quality of the parts you buy yourself. However, please refer to the repair manual before buying to avoid incurring costs. You should buy in sets to avoid buying too much to become unusable and need to reuse.
3. Replace crank shaft support silver
Lubricating oil is an indispensable solution to reduce friction between the crankshaft and bearings. The bearing is lubricated by motor oil passing through the holes in the machine body and through the crankshaft body to lubricate the crankshaft. You must use good quality lubrication so that the silver temperature will not increase, peeling off the outer silver layer and only the inner brass layer. At that time, the bearing and the crankshaft rubbed together, causing a sound when the engine was running.
When replacing the bearing pads, you need to install the correct silver position and the proper fit on the body. Apply a little lubrication before applying to the crankshaft. To keep the crankshaft from moving vertically, you must install 2 small silver pieces in the center.
4. Replace silver cuffs
When overhauling a part also needs to be replaced is silver ring. Silver cutters have 2 types and have the order of installation on different pistons. Silver 1 (fire silver) is subjected to high heat, so it is plated with a cromo layer, when dropped there is a low noise. The second silver (cuff) has an internal spring and a lighter color.
The types of silver have an inner stripe and are numbered or lettered to make it easy for technicians to identify when assembling. Put the silver in the cylinder and use the piston to push the silver in to see if the gap is suitable and then assemble.
Need to use silver puller to fit the piston into the cylinder more easily. Must clean cylinder before installing piston.
5. Replace sliced gaskets
To keep the body in sync with the lid, replace the lid when the machine is overhauled. Not only is it smooth and flat, but you also have to see if the lid is cracked or damaged.
Before attaching the cover to the body, clean the holes of water and oil on the lid. Avoid placing the device in the wrong position so that the oil and oil holes on the body are not aligned with the lid.
Technicians can add glue to increase the tightness of the piece. Only use a sufficient force to tighten the lid to prevent excessive compression.
Over time, mud will stick to the oil pump, causing it to weaken or clog. The technician will remove it gently to avoid scratching because this part needs high accuracy.
In addition to the basic details that must be replaced, depending on the damage of each vehicle engine, the time you need to replace or repair additional details accordingly.
6. Start the engine after overhaul
After the overhaul is completed, the technician runs the test belt. The test run helps the technician detect deficiencies in the assembly process to replace new parts. At the same time, it is also for the new parts to replace in the engine to get used to and wear out the excess metal filings. Lubricants will wash away metal particles. After using time, you replace the new oil to clean the engine.
So Thanh Phong Auto has introduced to you the things to pay attention to when overhauling the engine of cars. Thanh Phong Auto is a unit specializing in providing warranty service, repair and replacement of existing reliable car parts. Thanh Phong Auto will bring you services above all expectations.
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