These days in almost every car wash outlet you go to, you’ll see one form of pressure washer or the other. Pressure washer is a machine that pressurizes water which flows through it into a powerful force which is so strong that it acts as a sponge or brush. As effective as the pressure-washer maybe in terms of efficiency in washing a car, using it to wash the engine maybe hurting your car without you knowing it.

Please follow the link below to read more:
https://www.spotdem.com/2019/09/26/pressure-washer-is-it-wise-to-use-it-on-a-car-engine/

in fact Gas-powered models typically put out 2,000 to 2,800 psi of pressure compared with 1,300 to 1,700 psi for electric models. Much higher pressure allowed the top-performing gas machines to clean a grimy concrete patio three times faster than the fastest electrics.
Shop for the best pressure washers to clean your deck, driveway, and more

Best Overall, Electric: Sun Joe SPX3000 Electric Pressure Washer at Amazon.
Best Overall, Gas: Ryobi RY802800 Gas Pressure Washer at Home Depot.
Runner Up, Best Overall, Electric: Karcher K5 Electric Pressure Washer at Amazon.

I wouldn't try using a pressure washer for the car engine. There are a lot of metal parts in there, the same as the wires, and if the water stays in there for a long time the damage might be irreversible. I have a Karcher K5 Premium Electric power pressure washer which I love working with. It is one of the best pressure washers out there. But no matter how much I love using it and how much I love the cleanliness, I'll still use a wet cloth and soap to clean the engine of the car.

perfectbuy:
These days in almost every car wash outlet you go to, you’ll see one form of pressure washer or the other. Pressure washer is a machine that pressurizes water which flows through it into a powerful force which is so strong that it acts as a sponge or brush. As effective as the pressure-washer maybe in terms of efficiency in washing a car, using it to wash the engine maybe hurting your car without you knowing it.

Please follow the link below to read more:
https://www.spotdem.com/2019/09/26/pressure-washer-is-it-wise-to-use-it-on-a-car-engine/

N.O.

brainstorm214:
I wouldn't try using a pressure washer for the car engine. There are a lot of metal parts in there, the same as the wires, and if the water stays in there for a long time the damage might be irreversible. I have a Karcher K5 Premium Electric power pressure washer which I love working with. It is one of the best pressure washers out there. But no matter how much I love using it and how much I love the cleanliness, I'll still use a wet cloth and soap to clean the engine of the car.

I've never used pressure washers, however a lot of people advise me to try it... Why are you so lazy? Why can't you clean anything manually?

I use my pressure washer on my engine. But as with everything one must apply sensibility.

There’s a specific spray nozzle that I use and I apply water protectant in sensitive connections. I’ve been doing this for decades.

Some people can’t chew gum and walk at the same time.

True