sis004runner

my sister has a 00 4runner 2wd v6 and when your crank it you hear a deep knock/rattle noise and its the same noise when you hit bumps on the road. any body expereince this? sounds like its on the passenger side. thanks

fireteacher

motor mount?

brian2sun

Sway bar bushing/mount?

sis004runner

im thinking that too. i noticed when it was up hill in a angle spot idleing andd backing down it was makeing that noise but if the 4runner level it wont make the rattle noise i idleing.

RockyMtRunner

I had a clanking sound under the same conditions you describe. My problem turned out to be the end of the exhaust pipe, located behind the passenger rear wheel. I had bent that section of pipe upwards while coming off a rock. It was bent far enough to bounce against the end of a frame-bolt located above and near the end of the pipe. Whenever the pipe shook and bounced a little bit, like hitting a bump or starting the engine, it clanked upward against the bottom of the bolt. I found the problem by pulling the pipe down and letting it snap up--clanking loudly, just like the noise I was hearing.

I bought a hard rubber stopper at ACE hardware, sawed it to fit, drilled a shallow hole in the top to cup the end of the bolt, had my wife step on the pipe to hold it down while I slipped the stopper between bolt and pipe, wife let go, and the upward pressure of the pipe held the cushioning stopper in place. No clanking! The first stopper lasted 9 months, exhaust heat and all. I just put in a new stopper to go another 9 months.

RockyMtRunner

sis004runner, did you ever find the cause of your noise?

My clanking noise came back a few days ago, and I found that the replacement stopper from the solution described above had worn/melted thru already. Many hours of 4lo wheeling during hot days apparently took their toll. So today I put in a new stopper but didn't saw any off the end so it will last longer. I took some pics to show how the stopper stops my clanking noise, for a few months at least. Cheaper than a new exhaust pipe assembly, which is what a muffler shop told me was the only solution.

Old rubber stopper burned thru and pipe started clanking on bolt again.


Here is the new stopper with a shallow hole drilled in for the end of the bolt.


Here is the new stopper in place and stopping my clanking.

dave_mcmillan

Thanks for the help...I have been wondering where the squeek was coming from..makes perfect sense.