Timing chain replaced, awful sound
 

Wavin.
I have a 86 4Runner. 22RE

I replaced the timing gears, guides, tensioner and chain.
The cam gear did not have any holes in it, so i couldnt wedge a extention in there to stop it from turning when i was supposed to torque it to 80 ft lbs.
so that is the only questionable thing about this whole R+R.

iused an impact gun to tighten it. so i really have no idea what its torqued to.
i was thinking about tearing the valve cover off today and drilling a hole in the gear, so i can properly torque it.

Basically, the sound that i am concerned about sounds like a tight 'sching' type of sound emiting from the chain area. i figured it was due to the new chain, but it hasnt gone away, in 1000 miles, but it hasnt got any worse.

i have never heard another truck make this kind of sound. and i am concerned.

any tips? check lists? dude you F'd up? i would like a juicy steak right now?

c'mon guys.

i think im gonna go out there with a video camea and record it. and you tell me what you think

here is the video.

what do you think is wrong?
http://s93.photobucket.com/albums/l5...nginenoise.flv

Man that dosn't sound to good to me. I really wish I could help you out, but I just don't no. It does sound like something is hitting metal or something. I'm sure others will tune in on this.

yeah, thats what it sounds like to me. but i put new guides on it, so i am stummped.
keep the idea coming fellas. im gonna go tear off the valve cover, and try to peek down at the chain.

You say you've driven 1000 miles? Pull the valve cover and see how the guides look.

Oh and the way to tighten the cam sprocket is with the chain on. Put a wrench on the crankshaft bolt and cam sprocket bolt and torque to spec.

When I first started mine after a hg replacement it also made an awful sound. I was low on power steering fluid and it sounded bad. But yours doesn't sound quite like that.

Rob

is it a double row kit? or stock single row chain?

it is a single row chain.

so i just put the valve cover back on. i lloked in there, and there was no signs of abnormal wear. the chain was snug, like it should be, not tight like it sounds.

there was no wear marks any side of the chain. i looked at the clearance between the chain and evey thing. nothing was touching.

i pulled the coil plug and had the wifey crank it, and nothing out of the ordinary was detected.

so now i am convinced the cam gear that toyota desinged that has holes in it is supposed to somewhat dampen the noise emitted. also, it seems like the since the chain rides primarlily on the drivers side guide, noise is generated there, too.

and no the guides are not steel. I was thinking about going to steel, but concluded it was a waste, since when the chain has to be replaced next time, the plastic guides i wouldnt use would be $$$ wasted.

maybe its the aftermarket tensioners fault.

Sounds to me like it may be something in your accessory belts system. It may be possible that when you put em back together your dust guards on your idler pulleys got put on backwards and are rubbing on the pulley... I did that once somehow and it made a noise a lot like that... Or maybe one is going out, you may want to check those.

what brand parts did you use?

thats a good idea.
i will take off all the belts and see what happens. the idler pully bearing is fine. i never took it off, i left it on the entire p/s bracket.

http://www.twispnapa.zoomshare.com/m...p_f_bx_stk.gif

when i should have used OEM

use engnbldr stuff...

you tighten the sproket with the chain on and in gear, works great.. assuming its not an auto :D

I would check the valves, and the tension on the chain.. both can be done by only removing the valve cover. Then I would go to acc bearings.

Just a note, if you run the engine without any acc. belts on it don't run it too long as you're not running your waterpump :) Although, that gives me another idea, if you said it was doing this prior to the chain change, maybe its your waterpump, i've heard them make horrible noises before, or your alternator. I just cant believe a timing chain that seems to be on correctly would make that kind of noise.

My roomies truck sounds like that, It was actually the bearing in the alternator going out

Yeah, the more I think about it the more it sounds like a bad bearing, H20, alt, etc...

but I would retorque that sproket bolt...

thanks for you help guys, i found the problem.
by removing the p/s belt, running the engine, then the a/c belt, and running the engine, I discovered the A/C idler pulley was makin all the noise, so i removed it, and the belt!
woo hoo!

good deal, once you get used to no a/c you can make it a killer onboard air setup when you fix it :D

Glad you found out what it was, and that it wasnt anything serious. Just think, now you have a new timing chain and don't have to worry about THAT for a while!