gear heads. try to tackle this.

rotaryaddict · 10-13-2010, 04:23 AM

it is a 94 1.6 miata. poorman's euro version.

when i press down on the clutch the rpm will drop, sometimes it will even stall. it also makes a vibrating knocking noise when it is pressed. the noise will beat faster if i press on the gas. sounds sort of like a chain saw...

the car is still drivable and it idles fine. the problem occures only when i press on the clutch.

before this problem occured, i push started my car several times due to my dead battery. clutch is also a excedy stage2 3-puck clutch which is fairly new... stock flywheel is also slighly shaved.

the shop already installed a brand new stock clutch and even replaced the transmission but did not fix the problem... what can be causing this? please help

keepitsimple · 10-13-2010, 07:22 AM

Sounds like the throwout berring is going bad. If the berrings are going out on the throwout it put load on the engine and may choke it down. But, it will deffinately cause it to make noise.

It may have been installed incorrectly or it may have been overlooked by the mechanic when he changed the clutch.

Yellowihss · 10-13-2010, 08:34 AM

^correct.

Doppelganger · 10-13-2010, 09:04 AM

Quote:

Originally Posted by keepitsimple

Sounds like the throwout berring is going bad. If the berrings are going out on the throwout it put load on the engine and may choke it down. But, it will deffinately cause it to make noise.

It may have been installed incorrectly or it may have been overlooked by the mechanic when he changed the clutch.

"berring"...

lol

rotaryaddict · 10-13-2010, 09:29 AM

this is what happened

excedy stage2clutch -> 6months later...

clutch problem
-> back to a new stock clutch with new throwout bearing.
-> still the same problem
-> tried a different transmission with the new clutch
-> still the same problem
-> mechanic said there might be a problem with my crank shaft
-> i said wtf it idles smooth and accelerates fine.
-> mecanic said wtf do you want me to do

my original transmission is now back on the car with a stock clutch...
i told the mechanic about the bearing but he is possitive that it is not the issue because he had to remove and install it so many times...

but just like what you said, its choking the motor and losing power during take off. i have to give it more gas compared to before.

maybe i should just take it to another shop.

i really appreciate your advice. thanks

keepitsimple · 10-13-2010, 09:34 AM

Quote:

Originally Posted by Doppelganger

"berring"...

lol

haha yea I suck. Bearings

Hope the advice helps you.

rotaryaddict · 10-13-2010, 09:37 AM

the problem cant be coming from the crank shaft though right? it has nothing to do with it.

Nev · 10-13-2010, 12:27 PM

dude, it's the throwout bearing

rpspp · 10-13-2010, 01:01 PM

Maybe, crankwalk?

Nev · 10-13-2010, 01:47 PM

Quote:

Originally Posted by rpspp

Maybe, crankwalk?

get out

urban · 10-13-2010, 02:02 PM

you selling your stage 2 disc? 1.6?

Maikeru · 10-13-2010, 03:42 PM

Quote:

Originally Posted by rotaryaddict

the problem cant be coming from the crank shaft though right? it has nothing to do with it.

No, you would have the problem all the time then. It's the throwout bearing. Your mechanic probably just kept putting the same one in. Find a new shop.

rpspp · 10-13-2010, 03:45 PM

Quote:

Originally Posted by Nev

get out

Ok I'm out!

rpspp · 10-13-2010, 03:48 PM

Check to see if the disc is bent.

Maikeru · 10-13-2010, 04:16 PM

Quote:

Originally Posted by rpspp

Check to see if the disc is bent.

What disc? If your refering to the cluth disc, that wouldn't cause the idle to fuck up, it would just slip if it was warped. But that's pretty hard to do.

rotaryaddict · 10-26-2010, 04:58 AM

well, turns out the guys at the shop was right. its the crank shaft bearing. whenever i press down on the clutch, i can see the crank pulley getting pushed forward. ouch... i guess it's time for a rebuild or a engine swap.

keepitsimple · 10-26-2010, 07:15 AM

Damn so it was the thrust bearing. That is the one that stops the crank from moving front to back.

Crap dude. Yea, that def means rebuild.

10-13-2010, 04:23 AM	#1 (permalink)
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61	gear heads. try to tackle this. it is a 94 1.6 miata. poorman's euro version. when i press down on the clutch the rpm will drop, sometimes it will even stall. it also makes a vibrating knocking noise when it is pressed. the noise will beat faster if i press on the gas. sounds sort of like a chain saw... the car is still drivable and it idles fine. the problem occures only when i press on the clutch. before this problem occured, i push started my car several times due to my dead battery. clutch is also a excedy stage2 3-puck clutch which is fairly new... stock flywheel is also slighly shaved. the shop already installed a brand new stock clutch and even replaced the transmission but did not fix the problem... what can be causing this? please help
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61

10-13-2010, 07:22 AM	#2 (permalink)
keepitsimple Member Join Date: Sep 2007 Location: Spartanburg Posts: 1,006	Re: gear heads. try to tackle this. Sounds like the throwout berring is going bad. If the berrings are going out on the throwout it put load on the engine and may choke it down. But, it will deffinately cause it to make noise. It may have been installed incorrectly or it may have been overlooked by the mechanic when he changed the clutch.

10-13-2010, 08:34 AM	#3 (permalink)
Yellowihss Member Join Date: Apr 2010 Location: Austin,TX Posts: 576	Re: gear heads. try to tackle this. ^correct.

10-13-2010, 09:29 AM	#5 (permalink)
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61	Re: gear heads. try to tackle this. this is what happened excedy stage2clutch -> 6months later... clutch problem -> back to a new stock clutch with new throwout bearing. -> still the same problem -> tried a different transmission with the new clutch -> still the same problem -> mechanic said there might be a problem with my crank shaft -> i said wtf it idles smooth and accelerates fine. -> mecanic said wtf do you want me to do my original transmission is now back on the car with a stock clutch... i told the mechanic about the bearing but he is possitive that it is not the issue because he had to remove and install it so many times... but just like what you said, its choking the motor and losing power during take off. i have to give it more gas compared to before. maybe i should just take it to another shop. i really appreciate your advice. thanks
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61

10-13-2010, 09:37 AM	#7 (permalink)
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61	Re: gear heads. try to tackle this. the problem cant be coming from the crank shaft though right? it has nothing to do with it.
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61

10-13-2010, 01:01 PM	#9 (permalink)
rpspp Member Join Date: May 2010 Location: Oxnard Posts: 206	Re: gear heads. try to tackle this. Maybe, crankwalk?
	__________________ 94 M Edition 5sp, F1 light FW with a 6 Puck Clutch, Fuji ITBR, Fujistubo SS header w/ DYI mid pipe, AEM EMS, LC-1 Wideband, -16 Gauge, Bilstein coil overs, Hawk HP front pads. 90 5sp, P&Pished head, koni sports w H&R springs, Momo Seats, Cusco 7 point roll bar, G Vary body kit, painted in Ducati Red with stealth black, runabout side mirrors, BS low pro HL.

10-13-2010, 02:02 PM	#11 (permalink)
urban Senior Member Join Date: Apr 2006 Location: SoCal Posts: 4,294	Re: gear heads. try to tackle this. you selling your stage 2 disc? 1.6?
	__________________ http://speedhunters.com/archive/2009...b-to-envy.aspx http://speedhunters.com/archive/2008...-roadster.aspx http://speedhunters.com/archive/2009...gh-nguyen.aspx http://www.miatachallenge.com/

10-13-2010, 03:48 PM	#14 (permalink)
rpspp Member Join Date: May 2010 Location: Oxnard Posts: 206	Re: gear heads. try to tackle this. Check to see if the disc is bent.
	__________________ 94 M Edition 5sp, F1 light FW with a 6 Puck Clutch, Fuji ITBR, Fujistubo SS header w/ DYI mid pipe, AEM EMS, LC-1 Wideband, -16 Gauge, Bilstein coil overs, Hawk HP front pads. 90 5sp, P&Pished head, koni sports w H&R springs, Momo Seats, Cusco 7 point roll bar, G Vary body kit, painted in Ducati Red with stealth black, runabout side mirrors, BS low pro HL.

10-26-2010, 04:58 AM	#16 (permalink)
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61	Re: gear heads. try to tackle this. well, turns out the guys at the shop was right. its the crank shaft bearing. whenever i press down on the clutch, i can see the crank pulley getting pushed forward. ouch... i guess it's time for a rebuild or a engine swap.
rotaryaddict Jr. Member Join Date: Jan 2007 Posts: 61

10-26-2010, 07:15 AM	#17 (permalink)
keepitsimple Member Join Date: Sep 2007 Location: Spartanburg Posts: 1,006	Re: gear heads. try to tackle this. Damn so it was the thrust bearing. That is the one that stops the crank from moving front to back. Crap dude. Yea, that def means rebuild.
	__________________ Enjoy life.... Period...

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