Strange noise!

[PaRaDoX]

sooo got my car boosted yesterday, spent a day playing with the tune before id even take it outta the driveway, soo today i got it out, anyway havnt hit massive boost, (nothing over 5psi) they're is plenty of fuel and i have a constant black fuel cloud following me when i boost (fixed now)

anyway i went to a mates house, went to start it to drive home and it starting making a weird noise, we tried to figure out what it was, we tried a few things at his join (changed alt) suspected it was bearings on a fan belt item, anyway

so i limped it home, it drove perfect except for a unbearable noise, anyway got home and the noise got alot louder,

soo heres the noise
YouTube - weird noise

i went out and had a listen, sounds like its comming from the back of the motor now,

has anyone heard this sound before as its kinda distinctive and odd

when i changed my trans i swapped flex plates used locktite used a torque wrench, im gonna rip the insepction cover off and have a squiz tommorrow (god i love s1's inspection plate)

[Pub247]

Damn that is a weird noise. sounds like gulping air or blowing air idk it would be easier to tell if you could see and hear in person.
Oh yeah love the dose vid

[matty88]

It sounds to me like noisy tappets/valves?

If not check the fans, it sounds like it's hitting something....

Just my 2c worth

[Boonz]

broken balance shaft??? balance shaft bearings shagged maybe??? sounds pretty clunky lol too clunky for lifters anyways

[stocky]

the massive suction from your turbo caused a duck to fly into your engiine

[Pub247]

broken balance shaft??? balance shaft bearings shagged maybe??? sounds pretty clunky lol too clunky for lifters anyways

Good call on that one i was thinking of it but never heard what it sounds like might also be why it sounds like its coming from the back but you thought it was at the front first

[Garth]

manual or auto? it's changing pitch and speed when engine revs, sounds like loose or failing manual component, throw out bearing, or clutch. worse case is synchro's doing someting daft.

sounds nasty but it's not a engine noise, gearbox related noise.

if auto loose or failing torque conveter, or slipping or fialing compoent inside box.

[Boonz]

dont fix it just take it out lol.... ive only ever heard of them breaking ive never seen or heard one..... but theres not alot of things in a motor that can make a noise that pronounced that doesnt affect the running of the engine

[PaRaDoX]

yeah i know, well ive got a spare torque converter but for that id need to push the box back a bit to slide it out but its doable, eitherway, ill put the car on some sturdy stands start her up and see if i can hear where its comming from without getting under the car, cars too low atm to get a listen out,

garth thanks for your insight, its a auto; isnt the torque converter like the clutch sooo when out of gear nothing past the torque converter spins or does it spin the whole trans and the gears grip as they want to?

if anyone else is intrested in another strange noise my car started making today here it is
YouTube - VN Calais Turbo (Dose pipe fitted)

i took my time tripple checking everything this time to be sure that nothing was wrong, and i did 100km today on test drives and tuning on the street, the cars running 2 bar + big injectors..

its not rockers/lifters/valves because i used a screw driver to listen in on what they were saying and they sounded normal, this noise was more like its out in the open rather than engine internal, it could even be something as spastic as the dump rubbing on the chassis/trans or something like that

[greenfoam]

I rekcon loose converter too

[mason_luke]

this sounds like the same sound my series 1 vn had before the engine died, ended up being a twisted conrod or something arather, im not saying this is it but mine started off really soft then as i drove it go worse, it got really loud, bout as loud as yours is now and then the engine died, going out on a limb id say its something in your bottom end. tho i dont know much about engines, i no that sound is very simular to what mine made.

[CSL]

i changed an engine because of the same noise, didnt need to thou
i'm 90% sure youve cracked your flywheel,
is it a bit hard to start now???
because of the new found tourqe i reckon youve cracked it. when i took mine out one tap of the hammer and the whole centre part where it bolts the crank came out.
and if you think about it is the weakest link, it transfers all the energy from the crank to the converter and it only a thin bit of steel, i got another one from comcar for $40, just make sure the teeth are in good condition, if it's series one make sure its the 6 bolt one and series 2 usees an 8 bolt crank.
probally strart it, get a stethascope, and put it on the inspection plate (series 2) or bell mouth, and t should be a load clacking.

[HoZy]

Your converters stuffed!!!!!!!!!! Sounded like mine!

You get that noise when you don't align the converter properly.

Cheers
MaT

[PaRaDoX]

dont align the converter properly?
ive got a spare converter anyway

your right, it is hard to start its worth a check but i removed the inspection plate and the rear main has popped out a little, engine has to come out soon anyway i might remove it and take a look

[14secvp]

if its the balance shaft you should be able to feel it through the inlet manifold most probably torque converter by the sound though bearing let go in the torque converter
before taking the box out undo the converter and push it back into the gearbox then start it up with it disconnected see if the noise goes away

[PaRaDoX]

most likely, ill remove the inlet manifold and insepct the balance shaft, but honostly, a balance shaft is hard to snap considering it has no load on it...

does anyone know the size of the welsch plugs?
http://i29.photobucket.com/albums/c2...2072007314.jpg
those 4 not on the head

planning to hire a engine hoist next week and rip the bastard out

[PaRaDoX]

ohhh yeah its definiatly something round the converter
YouTube - broken

im going to unbolt the torque converter and try spinning the flex plate to see if the noise persists so i can check if its engine/trans related

[14secvp]

if the bearings gone in the T/C the impellor fins will be hitting each other and filling the trans with bits of metal unhook it and shove it up the box a bit fire it up it wont go anywhere

[PaRaDoX]

ok well its not the torque converter, i just started it up with the torque converter un bolted and it still makes that noise, they'res no load and no visable cracks on the flex plate so it shouldnt be that im thinking bottom end bearing? and the car wont stay running anymore its been hard to start when its cold because i havnt got round to the cold start in the tune but yeah this is silly cant keep it on for long at all, im thinking time for a new engine,

[14secvp]

bugger least youve got most of the experimenting out the way before you stick a new engine in so you think its bottom end noise as your final assesement then bigend gone or something or do you still think theres a posablity that it could be the balance shaft

[PaRaDoX]

im not sure, but the engine has to come out anyway, i wanted a excuse to start building a new bottom end for boost and i just got it anyway, my engines a virgin bore and it hasnt thrown a rod soo its good for a rebuild with some stronger bits, i have a large tax return due soon soo who knows

[Emackulation]

Fkn hell man, you've had some rotten luck with this thing havnt you. Best of luck solving it.....Dose it.

[mason_luke]

everyone ignores ol luke-o tho dont they! lol

at least your in the rite frame of mind for it. rebuild time!

[PaRaDoX]

hehe not yet, if something bad has gone wrong in the bottom end ill rebuild that and stick another one in it for now i rather not be off the road for more than a week, walking down to the super market with a weeks worth of meet (45 min walk) isnt nice :P

im going to remove the engine on sunday or wedensday if its a cracked flex plate or something thats ok i have another one here, i think i might find a broken bearing at the back near the rear main, maybe becuase of the broken rear main it got starved of oil, who knows ill know more on in the comming days

BUT if anyone else has heard it and has any more theories on what it might be please tell me :P

[immortality]

a mechanic once told me a story about a run of V6 holden engines (3800) where the gudeon pin (from the piston) comes loose and touches the bore, don't know if it's true however. that does sound bloody awfull.

you said it's been running very rich, you had any pinging/knocking when driving it. it does remind me of a failed bottom end bearing in my old 3.3