hey got a 94 sentra Xe as a gift(sweet gift) they guy took great care of the INSIDe of the engine, but the outside is bad, the aliumin is crusty like, and evrything is filty.
go to a parts store like auto zone or advance auto and look for some stuff called Gunk Foamy Engine Brite. if they dont have the foamy kind, the regular works just as well. make sure to cover up your air filter if you have a cone style first though. you just spray it on, let it sit, and then hose it off with water. if its really caked on an old toothbrush helps the foam. hope this helps.
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