Knocking noise and shaking engine

2000 TOYOTA RAV4

150,000 MILES • 2.0L • 4 CYL • AUTOMATIC

ZACH PAULUS

MEMBER
2 POSTS

After accelerating down the road yesterday, mistakenly turned the overdrive "off" and tried to pass a slow-moving car. Engine revved up without gaining speed, then kicked back, followed by a loud repetitive knocking sound (as well as the check engine light flashing). Vehicle now continues to knock loudly whenever idling, and becomes noticeably louder when opening the throttle (accelerating/decelerating). Oil was low (so topped it off), and is still making noise.

Jan 18, 2017 at 4:27 AM

HMAC300

✓Experienced Mechanic
48,601 POSTS

this may be a bearing problem as we cannot hear it have it. checked locally.

Jan 18, 2017 at 4:35 AM

ZACH PAULUS

MEMBER
2 POSTS

Thank you for the prompt response. I do not believe there is a way to upload sound files on this site (I could be wrong). I am pretty certain the sound is coming from the engine, not from the body of the vehicle. I am also afraid to drive it all, so it will most likely have to be towed if it is going anywhere.

Jan 18, 2017 at 4:42 AM

HMAC300

✓Experienced Mechanic
48,601 POSTS

well if you do not have any lights on the dash you should be okay to drive it someplace to get it checked. or if you can disconnect a spark plug one at a time and the knocking stops then that will tell you which cylinder it is.

Jan 18, 2017 at 7:27 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.