Intake cleaner #2611 March 24, 2024 Solutions Central › Category: -Questions - General › Intake cleaner #2611 0 Vote Up Vote Down Nathan E Grobelny asked 12 months ago Does the engine have to be at operating temperature while using this product? 1 Answers 0 Vote Up Vote Down chemtooler Staff answered 12 months 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