Vibrations!

[gpk_gti]

sorry guys this is not about the old polish club

Has anyone changed the dogbone engine mount by replacing the original soft rubbers to a much harder compound? and then found that there is a slight vibration at idle?? ?changed the clutch yesterday and while I was under the car I changed the dogbone mounts.The clutch and all assoc stuff was replaced correctly.
its peeing me off!!!! any advice would be great

[Tim]

if u uprate the mounts isnt it normal to get extra vibration? usually they will settle a bit after a few kms too. well that was my experience with my MK3.

[gpk_gti]

yeah thought so!going to nelsons bay this week so hopefully with the 600 odd ks should settle.The original ones were so soft and tatty.

[Bug_racer]

Did you change the flywheel when you changed the clutch ?
How many k's on the car ?

[gpk_gti]

no I didnt change the flywheel.the car has 106500kms.

[Bug_racer]

Who recommended a clutch replacement without doing the flywheel ? Did you at least replace the clutch slave cylinder ?

We had a flywheel blow out a while back in one of the race cars , the two parts of the dual mass seperated and damaged the whole housing of the gearbox and also the input shaft of the gearbox . We always replaced the flywheels from that point on .

I always replace the dual mass with the steel one piece flywheels . They may rattle a bit more at idle but its a lot better than paying the $1200 or whatever it is for a new flywheel .

The other thing Im curious of is your claim of 176kw out of a DBC car with a KO3s . I claim 180KW with 3 inch exhaust and the smaller KO4 kit . All the KO3s is is a KO3 with a larger exhaust wheel

[h100vw]

I bought a dog bone kit from ECS tuning and that vibrates quite a bit at idle. I reckon you could get away with only changing the biggest bush and that wouldn't introduce as much vibration.
I also just did the wishbone bushes and the ones that I removed were shot to death. The car steers much more positively and doesn't wander off line round bends any more when you hit a bump.

Gavin

[YellowDieselGolf]

My upgraded dogbone took about a month to free up.

[gpk_gti]

thanks guys for all your responses!! I just came back from Nelsons bay,500km trip and it seems the rattle has died down.definately the dog bone.
oh,I forgot.The chip that I have put is the mtm 176kw chip which im sure you know about.I have not used their turbo or injectors just their chip that is claimed 176kw.As I have dyno'ed the car before chip,I will be shortly dyno'ing again with the chip.The person doing the dyno is a third party who is not involved with any chip manufacturer/seller.
and as for changing the flywheel,why would it be necessary to change it when there is nothing wrong with it?my car is not a race car,just a fast daily driver.

[Bug_racer]

What else have you done to the car ? A KO3s wont flow enough get 176kw . 176kw from a drive by cable car means your going to need around 130-140 kw ATW's .

As for changing the flywheel , they are a servicable unit . Last time I checked a clutch kit for a gti from a dealer included the flywheel . Same reason why a thrust bearing and pressure plate are changed , they wear out ! .
And your car might not be a race car , we changed the clutches on those cars every 500 or so km , so the '000's of km you do would equate to the '00's a race car does . There has probably only been a couple of dual mass flywheels I would have re-used that still had a small amount of play in them . But its your car so its your choice

[aprr32]

flywheels

We never reuse a dual mass flywheel,always fit a new clutch/flywheel kit. The old flywheel may look alright sitting on the ground but when they are spinning its a different story.Besides who likes taking gearboxes out twice on the're own car and not get paid for it?

[gpk_gti]

you are right aprr32,bi&ch of a job.was done unexpectedly as I wasnt sure id have access to the workshop. and was heading on holidays the next day.have to put it on my things to do list.

[gpk_gti]

found this thread regarding dogbone mounts,,, at the bottom he talks about the vibrations!!! anyway mine has completely settled!!

http://www.ottawa-vdubbing.com/forums/phpBB2/viewtopic.php?t=13397

[XXX-1.8T]

any news on your dyno run?

I would be interested to see what u get from your "176kw" chip

[DubSteve]

any news on your dyno run?

I would be interested to see what u get from your "176kw" chip

I'm pretty sure he's getting more than that, by the way it moves.