- Apr 3, 2021
I have a 2020 4runner and took it off-roading today. I drove home and allowed the car to sit for an hour then moved it to the car wash station at my apartment. The coolant gauge was about at about 1/4 when I move it. I washed off the mud and then sprayed down the undercarriage, axle and wheel wells. Only after did it occur to me that maybe I should have waited until the engine was completely cold. Do modern aluminum block/head engines have the same risk of cracking as iron blocks when they are hot and exposed to water?