Intake cleaner #2611 March 24, 2024 Solutions Central › Category: -Questions - General › Intake cleaner #2611 0 Vote Up Vote Down Nathan E Grobelny asked 1 year ago Does the engine have to be at operating temperature while using this product? 1 Answers 0 Vote Up Vote Down chemtooler Staff answered 1 year ago For best results, yes, the engine should be at operating temperature. Please login or Register to submit your answer Username or Email Address Password Remember Me