× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: # 7 Misfire and intake valve hits the piston
Posted to Technical Discussion Forum on 3/17/2020


The early 5.7 Vortec engines had the same problem years ago. The intake valve guides were too tight from the factory and when the engines were used under heavy load the valves would tighten up and cause a misfire. The local dealer actually sent us som... Login to read more.