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chevy 350 bore 30 overheating Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting roblee New User Jun 11, 2009, 3:44 PM Post #1 of 4 (5380 views) chevy 350 bore 30 overheating Sign In i have a chevy 350 bore 30 over. my problem is that it over heats in about a 30 minute drive. when you first crank it up, it runs great, but as it gets hotter the carb starts loading up, like it's vapor locking, the temp gets anywhere from 220-230, i pull over to let it cool because it will keep climbing. I have replaced the radiator with an aluminum (factory direct fit), i have 2 electric fans (12 and 14 inch) and they pull a lot of air, replaced carb (quick fuel 650), intake (rpm air gap), water pump (high-volume aluminum), thermostat, pulleys (aluminum), i've even replaced the distributor, double-checked my timing, just not sure what else to do other than pull the motor! no coolant leaks! no water in the oil. This is a freshly built motor. All the parts are NEW.PLEASE help! Rob Loren Champlain Sr Veteran / Moderator Jun 11, 2009, 4:33 PM Post #2 of 4 (5375 views) Re: chevy 350 bore 30 overheating Sign In This is just a thought; Are you using a V belt or Serpentine belt? Depending on the year, some of the later model 350s used a reverse rotation (serpentine) water pump. What are you running the base timing at? Let us know more specifics. What year engine? What vehicle? What type ignition system, ect. Loren SW Washington tonys63 Anonymous Poster javiervazque@gmail,com Sep 8, 2009, 11:31 AM Post #3 of 4 (5128 views) Re: chevy 350 bore 30 overheating Sign In wow i have the same problem with my engine and replaced all the same stuff you did . can some one answer this! some water pumps are reverse rotation and some are ccr ? does it matter which way the pump turns as long as it turns the direction it was intended ? so if it was a serpentine belt and I install a v belt system will it cause the engine to get hot ? ps were the blocks different 1992 caprice motor thanks tony Hammer Time Ultimate Carjunky / Moderator Sep 8, 2009, 11:47 AM Post #4 of 4 (5117 views) Re: chevy 350 bore 30 overheating Sign In Yes, it does matter which way the pump turns. It has to turn in the direction it was engineered to or it will severely overheat.. The thing that usually determines which way it turns is whether it is driven by the front side of the belt or the back side. Pumps that are driven by the back side of the belt have reverse rotation. This is commonly found on Jeeps. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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.   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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