× 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: Vacuum No.reading
Posted to Technical Theory Forum on 7/22/2018


There is a recent thread where we discussed the crankcase pressure spec on a particular idling Valvetronic engine. The spec is 30 millibars, which is about 12 inches of water, or less than one inch of mercury. It doesn't take much manifold depression ... Login to read more.