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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   2006 Toyoto Camry XLE Driver Side Electric Window Trouble Hello, Looking for a little brain help ...   Tierod end change caused some kind of leak Hello so I just took my car to the nearb...   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...   Chevy strut replacement I'm trying to get a sensor of some kind ...

Search Auto Parts Search Coolant only leaks when driving Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting bjd618 Novice Feb 10, 2016, 12:39 PM Post #1 of 6 (1427 views) Coolant only leaks when driving Sign In So I've got a 2006 Monte Carlo 3.5l and I find a lot of coolant on the horizontal crossbeam between than runs across the car in front of the water pump and behind the radiator. Is seems to be spraying from somewhere there since I cant trace it back to its source. The weird part is I cleaned everything up, got a pressure tester and I cant reproduce the leak. Even pumping it up 18 psi and leaving it overnight I don't find any coolant. A quick drive around the block however and there is coolant all over the crossbeam again. I cant make it leaking by running the engine at idle either. What would make it only leak when driving? Hammer Time Ultimate Carjunky / Moderator Feb 10, 2016, 1:28 PM Post #2 of 6 (1419 views) Re: Coolant only leaks when driving Sign In It's possible that you have a blown head gasket that is pumping hot exhaust gases into the cooling system and what you are seeing is the overflow purging due to excessive pressure. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. bjd618 Novice Feb 10, 2016, 1:44 PM Post #3 of 6 (1416 views) Re: Coolant only leaks when driving Sign In Hmmm, its not anywhere near the overflow tank. Hammer Time Ultimate Carjunky / Moderator Feb 10, 2016, 1:48 PM Post #4 of 6 (1413 views) Re: Coolant only leaks when driving Sign In Anything else should show up in a pressure test. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. bjd618 Novice Feb 10, 2016, 1:56 PM Post #5 of 6 (1411 views) Re: Coolant only leaks when driving Sign In Update! it does leak from the pressure test. It just doesn't make its way so far toward the front of the vehicle so I didn't notice it. Maybe it gets on the belt which tosses it forward? If I run the engine it ends up where I usually see it but I haven't ran it today and its only on the bottom of the engine Hammer Time Ultimate Carjunky / Moderator Feb 10, 2016, 1:59 PM Post #6 of 6 (1409 views) Re: Coolant only leaks when driving Sign In You need to find it using the pressure test. Use mirrors if you have to. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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.   Email This Post   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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