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[turbohf]

UPDATE.... still makes that fuckin noise...

but:


Dave said fuckit, he would tune the knocker. so i drove an hour at 4-5k rpms up to his place and we tuned/dynoed it LOL...

300whp/210tq on the knocker... lol


=================================

lets play a game... but im also very serious about this.

got a fuckin noise. lots of things make noises, lots of things it seems can make this noise, so far, none have been proven to be this noise...


i hate noise


your thoughts?



info that i feel like providing, more will be given if actually needed (will update).
B18C w/decent base map on it. we are idling at like 14.5 AFR's
valve lash is to spec, triple checked
pushing in clutch makes no diff

[turbohf]

is the motor stock? was it just rebuilt?

rebuilt maybe half a mile on it, 2 hours of idling. aftermarket parts include: ACL rods/mains/thrust, NPR rings, Supertech 70lbs springs (they are the lighter ones). rest is OEM.

shit was plastigauged, turns freely. bearings have been removed and reinspected. none appeared to be spun. cleaned, lubed, reinstalled.

[Ravage70]

sounds like plastic hitting metal because it smooths out as it spins faster. Timing belt hitting cover? Water pump hitting cover?

[turbohf]

sounds like plastic hitting metal because it smooths out as it spins faster. Timing belt hitting cover? Water pump hitting cover?

mmm. so the belt isnt hitting forsure. nor is the cam gears hitting the VC. but, i havent checked for the crank pulley against the cover, but that would make a grinding/cutting noise. OEM water pump and cover with no bends or warpage to it.

[88dx]

everytime someone paints the valvecover white it makes that noise

[turbohf]

everytime someone paints the valvecover white it makes that noise

made the noise with the SPOOOON yellow one also

[88dx]

buy a stethoscope from HF so u can hear where its coming from 

[highroller54]

does it sound like its at the top of the motor bottem, either side? Jack it up and listen under it even if you think its the top.

Is the crank pully fucked?

whats the oil pressure at idle?

[turbohf]

buy a stethoscope from HF so u can hear where its coming from 

well from my ears it sounds like its coming from maybe the intake side or timing belt area. throw a fat ass screwdriver on some shit and up to your ear sounds the worst with it in the top port on my Tial WG, or exhaust manifold.

i have a HF stethoscope, it is a piece of shit.

[turbohf]

does it sound like its at the top of the motor bottem, either side? Jack it up and listen under it even if you think its the top.

Is the crank pully fucked?

whats the oil pressure at idle?

not sure, i thought forsure it was top. so i adjusted the valves. nothing (well maybe a little noise went away). i can deff hear it good from the top. put my ear directly on the oil pan, heard good noise there. so i pulled the pan and the rod caps off. everything looked good. spins fine. spun it shitloads wihtthe pan off cant hear or see anything making noise.

crank pulley looked fine when i put it on. it was on my previous motor. off JDM ITR motor.

no oil pressure gauge.

[j.h.christ]

LMA's?

[theidealone]

Flywheel or clutch bolts backing out maybe? Does it get faster with revs?

[turbohf]

LMA's?

low miles ITR's. i pushed down on all them on the last valve adjustment. no binding, and full range of motion. also louder than any LMA i have ever heard.

LMA's, slopped out bore, wrist pin

My shit makes a similar noise, not that loud, that lessens when it warms up and I was told it was either slappy pistons or slappy LMA's.  Not too worried about it, I've raped it for 30k miles so far and it's gotten a little worse but I don't care it keeps taking it.  I also have hells of blowby so I reckon it's slopped out bores.

has 200psi across on the compression test. i can feel a little blowby out hte VC.
as for confirming either of those? both looked fine, but didnt actually check. also not so much concerned. not looking to get that many miles out of this motor.

also noise doesnt seem to change at all stone cold, or after the fan has cycled a couple times.

[highroller54]

pull a plug wire while its running, see if the sound changes, do all cylinders one at a time.

[PhilStubbs]

if its not LMA's, then it sounds like a wrist pin. are the pistons/rods/wrist pins new? if not i would really consider that. i had the problem once. took me forever to figure it out. i would have put money on it being a valve/LMA issue but it wasnt.

also, it was very difficult to feel the problem. if you closed your eyes and wiggled the piston on the rod you could feel it. it was VERY minimal but made a lot of noise. it also showed up measuring the wrist pin with calipers, but barely.

[1fasthf]

timing belt tensioner mayb?

[turbohf]

pull a plug wire while its running, see if the sound changes, do all cylinders one at a time.

did that, both plugs and injectors. just runs on 3 lol...

if its not LMA's, then it sounds like a wrist pin. are the pistons/rods/wrist pins new? if not i would really consider that. i had the problem once. took me forever to figure it out. i would have put money on it being a valve/LMA issue but it wasnt.

also, it was very difficult to feel the problem. if you closed your eyes and wiggled the piston on the rod you could feel it. it was VERY minimal but made a lot of noise. it also showed up measuring the wrist pin with calipers, but barely.

pistons/rods are used. one piston/rod is questionable cuz it went to the machine shop to get swapped around. one had spun bearing the other had broken piston, made one good setup. all seemed to have good movement when removing the bearings while in the car. but dont have that much of a range of motion.

timing belt tensioner mayb?

its a bearing tensioner not hydrolic. havent had a person yet that has said it was possible for the noise to be that style tensioner. even teh vet techs at work.

[turbohf]

also, we just had the valvecover off the car while it was running. the noise is NOT coming from the head lol... slight tick maybe from one of the valves, but the noise isnt there. and everythign in there is getting oiled pretty good LOL...

[snm95ls]

Probably a long shot, but you didn't happen to check rod side clearances did you?

[turbohf]

Probably a long shot, but you didn't happen to check rod side clearances did you?

they wiggle like everyother one i have installed lol

---

so went for a drive with a buddy. at an idle its fuckin noisy even inside an integra. at low speeds >35ish you can hear it knocking away. but really at hwy speeds you cant hear it. under boost nothing. even under decell we really didnt notice it.

---

all 4 pistons where running in that motor before. cant get a 100% answer, but there wasnt any noise till the motor spun a rod bearing. rod and crank came out of a motor that detonated a bunch of pistons/sleeve or something. crank was micro'ed, rod/piston swapped by machine shop. and like i said bearings inspected after running for a while.

nothing about the pistons/cylinders looked out of the ordinary upon build.

---

i think its a piston/wrist pin issue... and plan to turn/drive it till it breaks or i build another motor

[snm95ls]

This:

so went for a drive with a buddy. at an idle its fuckin noisy even inside an integra. at low speeds >35ish you can hear it knocking away. but really at hwy speeds you cant hear it. under boost nothing. even under decell we really didnt notice it.

leads me to believe it is this:

i think its a piston/wrist pin issue...

[turbohf]

fuck, if it was that i would be almost tempted to pickup another piston/rod and slap the fucker in there......

[snm95ls]

Just to toss this out there:

I have seen mention of "lightly lubing the piston assembly," which I don't agree with.  I think that sometimes people forget how important it is to make sure that the wrist pins are well lubricated before the piston/rod combo goes into the block during assembly.

I would ASSume that you know better though.

If it is indeed a sloppy wrist pin, it might have just been worn out, not not necessarily an assembly mishap.

[88dx]

fuck, if it was that i would be almost tempted to pickup another piston/rod and slap the fucker in there......

I would think if it was a wrist pin issue the noise would have changed when you were pulling plugs 

[PhilStubbs]

After reading the post about the pistons and rods, I'm sure it's a warn wrist pin.

Does the sound go away at high vac crusing, like in the 15-20inhg?

[ratcityrex]

Mine has that same sound when cold, Not quite as bad as yours but its there. But once it warms up it goes away. So i think mine is my ptw clearance. Yours dose sound like a piston slap the never goes away. So what was you ptw clearance when you set it up? Im running mine at 35 thout. But Ive heard some slopped out vitaras that make that same kind of noise but still make a shit ton of power.

[ratcityrex]

If it dose its not enough for my def ass to hear it.

[turbohf]

After reading the post about the pistons and rods, I'm sure it's a warn wrist pin.

Does the sound go away at high vac crusing, like in the 15-20inhg?

idk, my gauge is JDM (greddy). and wasnt paying that much attention to it. but yeah, im gonna guess anything in the 10in-8psi range you cant hear the noise.

[highroller54]

fuck, if it was that i would be almost tempted to pickup another piston/rod and slap the fucker in there......

I would think if it was a wrist pin issue the noise would have changed when you were pulling plugs 

yes it usally does, thats why I wanted him to do that.

[PhilStubbs]

i tried the plug wire thing with my car and the noise didnt go away. it sort of changed, but it also ran like shit with a plug not firing so its hard to say really