Almost everybody knows about the rule that in winter you need to heat up the JDM engine at least 10 minutes before you take off. Some dispute it, claiming that this is just a habit from the period of old cars, while others never forget to let the JDM engines work for 10 minutes before they head off. Who's right?
Main argument of those who claim that engine heat up isn't necessary is that this is unnecessary fuel consumption and pollution increase (research from 2009 showed that idle engine action-without any use of JDM transmission- produces 1,6% of total gas emission responsible for global heating) and that cars with direct injection don't need heating to function normally.
This is true-work of numerous computers within the car manage to control cold engine far better so you could say that 10 minutes of idle JDM engine work will only turn fuel into exhaust gases.
On the other side, this is just a part of what happens within the unheated car engine when it’s cold outside. On low temperatures, oil acts in a way that it thickens and flows towards the lowest part-crack case. Due to this, oil is far from mechanical parts it needs to lubricate and it also has more difficult approach to them because oil pump also has more difficult work to perform due to thicker oil. Basically, unheated engine is without oil in first few minutes of work and lack of oiling is one of main reasons for "wearing" of engine mobile JDM parts.
With all the said, it is easy to conclude that in the winter is wiser to wait for few minutes before you start driving. This will enable for necessary fluids to go through engine and lubricate parts that need lubrication. It is also important not to speed up suddenly and drive in high RPM. This will enable your car to reach working temperature in the best possible way.
When car washing, rarely anyone looks under the JDM front clip and when someone does it will never touch engine dirt and dirt around the engine. However, car JDM engines and all the space under the hood need to be clean for several reasons. First, most obvious one is that cleanliness will enable easier notice of irregularities such as leak or lack of oil, water, belt wear, rubber hoses, etc. Other, no less important reason is a short circuit on engine electrical installations that can lead to improper work or even engine crash. There are additional risks with overly dirty engines. Oil deposits, gas remains, and dust remains-all this creates potentially flammable residue.
This is why occasional JDM engines wash is desirable prevention. However, engine wash isn't as simple task as it might seem, especially when it comes to petrol engines. Engine wash is performed with the usage of special degreasing solution and water under pressure of over 100 bars.