dirty engine

Greetings I went to change the oil, I have always been very judicious to ccambiate it to the indicated time, however the sñor who attended me I deduced that apparently a while ago I have been deceiving me and they have not changed anything. In such a way that now the engine is dirty with a "crust". One person tells me that you have to lower the engine and clean it, another tells me that they sell a proute that makes a solo engine cleaning and that with that is enough, which of the two do I listen to? My car is Chevrolet Spark 2005

That scab that they tell you is not due to lack of oil change, but rather it goes through the quality of the same, and the effort of use, I have a Nissan in my workshop with it is actually the same problem, in reality the best in these cases or the correct way of performing a cleaning is dismantling the engine and performing a kind of adjustment, it is expensive but it is the same that it will cost you to repair it when it is founded by this problem. From the engine that is in contact with the oil even the small internal channels the oil pump the oil pump and all the other compositions.

How many km has the engine traveled? What severe is the crust? (Open the plon where the oil is put and try to see how the tree and cams look like, in general it is the most affected part because it heats up more. If it is very, very dirty, then care with detergent additives, they can cause some ducts to be
tape High cleaner, but very careful, do not leave it for a long time and turn off the engine with the first bell that you
listen

to

That crust that forms is not because you have not changed your oil, most likely it is because they did not do it correctly if not that the old man emptied and filled with the new Complete and assemble it again "with its new packing" I will give you a better result and apart remember to use a good oil that protects you the engine against these future inconveniences.

Greetings.

Thank you very much for your orientation. The engine has toured 5,000 km and I have changed the oil when they have indicated it to me. Then I will lower the engine.

thank you.