Rod knock or Main bearing knock?

[yaris2010RS]

it would thump when u innitiially change the load on the enigine (such as changing from park to drive) but it will not continue to thump and would whine and thump as the engine accelerates. at higher rpms u would also notice the engine would feel unstable.

with how u are describing it i highly doubt its something that serious.

block the wheels and put the car in drive with the e-brake up and look at the engine. try to see where the sound is coming from. hold things u may think will be hitting the engine or body. does it sound like a metal on metal sound or just hard force on a hard surface? feel the top of the engine while running and see if u can feel the knocking syncronized with ur ears

[jabranko]

Originally Posted by yaris2010RS

it would thump when u innitiially change the load on the enigine (such as changing from park to drive) but it will not continue to thump and would whine and thump as the engine accelerates. at higher rpms u would also notice the engine would feel unstable.

with how u are describing it i highly doubt its something that serious.

block the wheels and put the car in drive with the e-brake up and look at the engine. try to see where the sound is coming from. hold things u may think will be hitting the engine or body. does it sound like a metal on metal sound or just hard force on a hard surface? feel the top of the engine while running and see if u can feel the knocking syncronized with ur ears

I did that - put it in drive with the ebrake on and was looking and listening under the hood (without blocking the wheels dumbass me good thing it didn't start rolling) It sounds like it is coming from the left side of the engine behind and below the alternator or behind the engine. I laid my ear onto the top of the engine and didnt hear anything besides the valves ticking away inside. I know that doesn't help much just figured I'd put that out there.

EDIT: The noise sounds like a hollow slightly metallic (i say slightly because it doesnt sound like metal hitting metal it kind of sounds in between plastic and metallic) sound that kind of goes cuh-cuh-cuh-cuh