r33 vibration

[viking]

i have an r33 gtr and was running fine until i had the clutch changed recently (heavy duty Extreme).

it idles fine then i can feel vibration through the whole car from 1200-1400 revs (car in neutral). put my foot on the clutch and it still vibrates between those ranges. beyond those revs it smoothes out again.

cant seem to work out wat the problem is. im gonna get it dyno'd next week perhaps that might give an indication.

has anyone had this kind of problem????

[shyr33]

hi viking my mate sorta had that problem when he got his clutch changed it was vibrating and stalling, so he took it back and they didnt adjust it properly otherwise i wouldnt know what would be wrong hope that helps

[viking]

i took it back to the mechanic and they had a look around but couldnt find the problem. he's pretty honest so i dont think he's jibbing me. he said thats the first time hes heard of this cas he's done heaps of clutches. do u think its cas the clutch plate isnt aligned properly or something??

[justin911]

hmmm the same thing happened to my car when I got a new clutch. (some xtreme clutch) It still happens come to think of it. Mainly in second gear. Not to often though. I think i've read a couple of people get that or something as well with there clutch. Have a read through this http://www.skylinesaustralia.com/forums/sh...ead.php?t=69220

The mechanic that did mine said "they do that", noone who i've taken it to after has been able to fix it so I just put it down to me driving to slowly in second gear I guess.. Lemi know what yours turns out to be though please

[Ionos]

If it's vibration that makes no diff whether clutch is engaged or not, it's probably your engine / gearbox mounts. Check that there isn't metal on metal anywhere (one of the mounts could be broken and resting on metal)

[viking]

yeah i've checked all the engine mounts and underbody braces, all is good. i spoke to a guy at ABS that does clutches and he reckons it could be the fly wheel not balanced (machined properly) i hav a lightweight flywheel i believe cas the mechanic mentioned it was very very light compared to others he did.

[ferni]

lightweight flywheels cause vibration normally, you'll find your engine gets put under load easier...

[viking]

hi ferni. it had the same fly wheel before with the standard clutch and was fine. do u reckon they could hav machined it out of balance. If the engine gets put under load easy this would be a bad thing right? Does that defeat the purpose of having a light weight fly wheel?