wasn't sure were to post this but figured it was the best place
I have this noise coming from my head(90%sure)
motor has about 1000 miles on it after being built,
so far i have changed LMA's twice, full rocker assy. and had another valve job done
it only makes this noise when at idle and usly only at 1k rpms, there is nothing in side of the head(like a nut or bolt) it has been torn down vatted and inspected, valves are ajusted at .008 and .006, I'm completely lost and have done every thing i can think of so if you have any ideas HELP ME PLEASE!! i realy dont want to get it tuned untill i figgure this out.
if not please bump, thanks
[URL=http://s199.photobucket.com/albums/aa302/turbo-2nr/movies/?action=view&current=MOV01148.flv][

 

whats your oil pressure?

 

at the greddy gauge that is ran off a 6inch line and T'ed off to my turbo feed it reeds 15-20 psi at 800rpms when warm

 

How thick is the oil? and Is that warm? I have about 45psi at an idle on start up, once it get bagging on it, at an idle i still see around 20psi.

 

that is def an interesting noise, did the noise happen when turbo was not installd, does it have shaft play?

have you compression tested it? static and leak down
did u put new tensioner on it?

try disconnecting alternator belt, make sure its not in the alternator

use a screw driver or other listenin device to try to pin point were the actual area is

i would hate to say its a bearing, but it could be possible or piston/loose wrist pin perhaps,
i dont want to guess, i want to have more information

hope this helps
dan

 

i had a built single cam that had a noise similar and it tuned out to just be piston slap whats your piston to wall clearance and does it only happen on a cold start

 

This is kind of off the wall but it actually sounds like vtec is enganged at idle, it will kick in and out because of low oil pressure and makes some horrible clunking noises. I tried engaging it at idle once to see what would happen and that is similar to what it sounded like? Could be alot of other things also just thought I would throw this out there.

 

at the time of the video the car was warm, as for oil press. when it is cold it is around 50-60 im running 10-40.
this motor was just built, and the turbo is brand new, so no shaft play as for the alt. iv checkeed in side and took the belt off no diffrince,
as for piston to wall clearance the are in speck for wisco with the rings gapped for boost,
im going to try the vtec thing and see if that works, thanks for all the impot, if yall have any more sejestions let me know

 

Check your cylinder head...it could be the shafts that hold the rocker arms. There is a lock on the exhaust shaft and the intake shaft and if you do not have those, the shafts will move front and back. They will sound like a piston or a rod that is knocking.

 

Back your vavles up to .010 on both sides to make sure you don't have a vavle to pistion clearance problem. I had that happen when I went to over sized valves with stock pistions.

 

Are you using JE pistons by any chance?

 

deff no piston to valve clearince problems, there standard size supertec valves, stock gsr cams, and the pistons are low comp.(wiseco #K541M81 Comp. Ratio 8.6 - 8.9)


have tryed 2 sets of rocker shafts, as well as 2 sets of full rocker assy.and the pins are in

 

HELL NO!!!! lol wiseco is all i will ever run

 

it is your vtec soleniod is either stuck open or took a ****. at low oil pressure, the rockers come in and out of vtec at idle and goes away when pressure goes up. change it out.

i had the same thing happen when a customer changed his vtec solenoid and i was tearing everything apart to find out that it was just a bad vts. lol gl

 

that's what i was thinking, i changed the vtec sol. out to day and it made no diff. i know the one i put on was good because it came off my motor i just took out of the car,so i unplug the sol. and effects nothing, unplug vtec oil sensor and disabled in hondata, and nothing either. i dont know if the vtec come on because its not tuned(waiting to fix this noise) and i cant take it that high to find out since i have boost cut at 3psi. if the car idles at 800 rpms it dont make the noise it only makes the noise at almost exactly 1000rpm!! it will will make the clack at 1k than the noise will go away because it bumps up to 1200rpm, than i falls back to 1k and makes the noise and bumks back up and just keeps repeating, that's why i thought it was going in and out of vtec

 

I agree. This is the first thing that popped into my head when listening to the video.

 

check your cam gear bolts are tight.

 

yeah deffinatly bad when you rev

 

its never made th noise over 1000rpms, i got about 1000miles on it and no metal in the oil no loss in compression, no marks on pistons(took head off and checked just in case and did a valve Job just in case) no bent valves....

did that , even changed cam gears no difference

I'm out of ideas guys so throw some more thoughts out there
iv had a few ppl i know that have been buildin high HP hondas for years and are all stumped

 

THAT IS A BENT VALVE!!!! STOP REVING IT!!

the valve is sticking to the valve seat...

it only clicks when its about 950-1000rpm huh? and it revs high ok? and it sounds like bones breaking in the head?

Yep!

I had a head do the same thing!! crazy, i replaced rockers, lma's, and it never changed.....
Pulled the head and they seemed to be fine, changed them anyways and the noise was gone...

 

Have you checked the vtec engagement yet? Its been mentioned like 3 times in this thread.

 

He just said right above your post he pulled the head and checked it and did a valve job, and he also said that he changed the vtec solenoid and pulled the wire and still had the problem.

 

the valves are brand new supertecs when ever i went to get the valve job i had them checked just incase but they were all good
iv bone a leak down and its only 2% all the was across so deff no bent valves

 

Ok..... never said it was your valves. Once again are you sure your vtec rods are not trying to engage in your rockers. I know it would be crazy since you have already checked, but maybe there is something odd happening at that rpm.

Other than that, since everything has been changed I am lost.

Maybe try a different head withh all the moving parts in it?

 

bump for more ideas