[Gabriel]

I wash my cars engines twice a year on my driveway , but if yours is very dirty , go to a hand car wash , get a couple of engine cleaner sprays ( Gunk or other brands ) and make yours shine . After that it will be easier to find the leaks .Just make sure to let your engine cool down before applying the foam and don't spray on the air filter or something that might prevent the engine from starting after the good bath :D