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'02 Chevy Z-71 5.3L Intake Manifold Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> CarJunky>> Open Posting leshnaf New User Sep 19, 2009, 5:02 AM Post #1 of 4 (5149 views) '02 Chevy Z-71 5.3L Intake Manifold Sign In I have a 2002 Chevy Silverado 1500/Z-71 with the 5.3L, 160K miles. My check engine light came on and after having it put on a machine was told it MAY be the intake manifold gasket. They didn’t sound real sure of themselves so wanted to get some feedback from other sources. Engine light is on and it starts and runs fine in warm weather. In weather 50 degrees and below the engine revs way up until the engine warms up. I ran my own test by spraying a little WD-40 around the intake and got a reaction around the number 8 cylinder. Am I on track? Do I need to replace the gasket? Have been reading about numerous GM gasket failures mostly on the V6 types and am not seeing any antifreeze in my oil. Tom Greenleaf Ultimate Carjunky / Moderator Sep 19, 2009, 6:00 AM Post #2 of 4 (5140 views) Re: '02 Chevy Z-71 5.3L Intake Manifold Sign In IMO - I you get a reaction from spray - carb cleaner, brake cleaner or even the WD-40 where it shouldn't be there's a problem there, T Hammer Time Ultimate Carjunky / Moderator Sep 19, 2009, 6:06 AM Post #3 of 4 (5136 views) Re: '02 Chevy Z-71 5.3L Intake Manifold Sign In We would need the exact code number to have any idea if they are on the right track. Those manifolds are known for coolant leaks at the intake gasket but vacuum leaks are a little more rare. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Jeff Norfolk Enthusiast Sep 20, 2009, 8:03 PM Post #4 of 4 (5125 views) Re: '02 Chevy Z-71 5.3L Intake Manifold Sign In I think the 5.7 is more common on coolant leaks. The 5.3 has a very common vacuum leak problem. With a reaction from spray that is likely the cause. Jeff   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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