Knock like sound from engine
- Thread starter ViktorioH
- Start date
-
- Tags
- knock mechanical problem sound
Help Support Yamaha Raptor 350 & Warrior Forum:
Could be the video but I'm not hearing any knocking.
Hi thanks for replying, but when I got it it used to be more silent there . Now it is louder than the exhaust
And it sounded better before now it knocks
YamahaNutz
Well-Known Member
Easy quick way to check is to take a steel tube, around 1/2" to 1-1/2"(if you have something laying around) and touch it to the motor in different areas. You hold it to your ear and listen to where it's the loudest. O'Reilly has a fairly cheap tool for this that is a stethoscope with a rod attached to it. You can pinpoint where the sound is coming from.
Could be a ton of different things. Try to use a tube or stethoscope tool and just touch it around different areas and find where it is the loudest.
Have you checked the valve lash recently? These motors are known to have some sewing machine like noises.
Could be a ton of different things. Try to use a tube or stethoscope tool and just touch it around different areas and find where it is the loudest.
Have you checked the valve lash recently? These motors are known to have some sewing machine like noises.
PineyPower
Well-Known Member
A screwdriver makes a good stethoscope too.
Hi it is coming from under the cylinder/ around that area
YamahaNutz
Well-Known Member
Valvetrain noise can transfer through the chain to the lower end. Lower left side more noisy?
Altabell
Member
What year are you working with my early quad has always sounded similar
2006 raptor 350
No more in the middle
YamahaNutz
Well-Known Member
You can probably take the plug out, and get the piston near top dead center. Now grab a wrench on the stator side bolt and rotate it back and forth slowly. If it clicks or knocks, you might have a worn rod bearing(top, bottom, or both). If you take the camshaft cover off, you can check for excessive slack in the camshaft chain, too.
