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94 sierra thermac Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) 1 2  View All Auto Repair Home>> CarJunky>> Open Posting Tom Greenleaf Ultimate Carjunky / Moderator Dec 23, 2015, 6:46 AM Post #26 of 28 (1357 views) Re: 94 sierra thermac Sign In Many way to find vacuum leaks, smoke is one and true the fan(s) of assorted vehicles kill it. With this you should have a fan clutch and if cold (AYOR and careful) can hold it still. This isn't the same with all fan clutches at all at the risk of harm to you or damage. Of my own I listen from cold they roar then go to just a bearing and it almost stops by itself till hot air thru radiator. I couldn't guess any other vehicles so any tricks of that sort at your own risk and plenty of it. If in doubt most you can take fan and clutch right off with replacement bolts so it's all in place which is a lot of hassle if fan breeze is such a problem try another method would be my choice on this layout, T Hammer Time Ultimate Carjunky / Moderator Dec 23, 2015, 8:15 AM Post #27 of 28 (1354 views) Re: 94 sierra thermac Sign In No, you don't smoke test with the engine running. You cap off the intake and blow it into a vacuum port and look for the smoke escaping. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. Tom Greenleaf Ultimate Carjunky / Moderator Dec 23, 2015, 8:40 AM Post #28 of 28 (1352 views) Re: 94 sierra thermac Sign In Perfect sense. I have total luck with carb cleaner or real soapy bubbles so don't do it that way. Just chance haven't fought too hard to find them, T 1 2  View All   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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