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Today while driving down the road, my 99 4 runner made a strange noise and then began to smell and put off a smoke or steam..not sure. Obviously I pulled over and turned off the vehicle. There was fluid leaking from underneath. When starting back up...it made a very noticeable noise while running..maybe knocking like. Any ideas on what this could be?

Answers from the Automotive Experts

Amanda J. Pierce, MBA Jessica, You may have a failed water pump, the sound that you hear could be from worn out vanes/bearings in your water pump. I suggest having the vehicle towed to a reputable repair facility. You can use our female friendly dealers and repair facilities to hopefully find one in your area.

Bogi Lateiner, Owner and Technician at 180 Degrees Automotive Hi Jessica - It sounds a bit like you overheated the engine. Did you notice if the temperature gauge went into the red? If the engine is making noise like a knocking noise I would definitly not drive it at all and would get it towed instead to a reputable repair shop to get it checked out. It may be something smaller, but if the leak and steam was coolant - that knocking noise could be a sign of internal damage and you don't want to risk making it worse before getting it inspected. Good luck! Bogi Lateiner 180 Degrees Automotive, Inc. http://www.180auto.com

Laurie Sarno, Co-Owner at Super Girls Auto Hello Jessica- It's hard to say without seeing it...but it sounds like you blew a head gasket ie the smoke/steam- if it started knocking chances are you may have serious engine damage- it's probably best to have it towed to a reliable shop or dealership & have them check it out- but this will probably be a expensive repair- sorry- hope this helps- thanks Super Girls Auto.

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