Date: Thu, 8 Nov 2007 10:38:12 -0500
Reply-To: Benny boy <huotb@VIDEOTRON.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Benny boy <huotb@VIDEOTRON.CA>
Subject: Re: Clutch shutter, vibation, shaking - why?
Scott says it all.
I agree with him for the flywheel, they rarely go bad.
So here is my story, it may help a few, when we put the subi inside my van
we also put a new LUK clutch kit, all seem well, at that time, i had the
original old trany. So only after a short wile (500miles or so) , when
downshifting from 2 to 1 i had big "hunting/shaking/chatter's" like the
engine was ready to come out. So anyway, it staid like that for a wile and
anyway i was waiting for an AA Transaxle trany so i would change the clutch
at the same time i would swap trany... the trany came and i have dicided to
keep the new/old clutch and see if the trany/cluch lever could be the
problem! Why, because the lever of my old trany was very dificult to move by
hand (tany out of the van), so i kept the old clutch even if heavy sign of
clutch disk dust was present.... Test drive: No more hunting/noise/heavy
vibration.
That lasted for a long wile, but since about few month, a similar problem
came back slowly, it was now only in first gear wile engaging the clutch,
sometime in reverse also... i let it go for a wile but in the past week,
that have become almost horrible, i found a way to cheat that problem but
still, no way i was going to Mexico like that. You should also know that
this is not very dangerous as nothing will break in a short therm, just
unpleasant, just rev the engine a bit before letting go of the cluch pedal.
The conclusion, i did the cluch this week, the slave cylinder and lever
where working nicely ((((yes to your question, the lever will go up if you
push on it, and that is not normal in my world, but VW and other guru says
it is?, that mean that the bearing is always touching the pressure plate,
plain stupid)))), so when i look at the pressure plate before removing this
one, it was all blue colored where the bearing touch this one, heavy burned
smell, lot's of dust, no oil leak what so ever...
-Flywheeel is kind of blue but still straight, plenty of disk mark
-Disk also show lot of mark and plenty of dust grain (round little dry ball)
-Pressure plate is also like the flywheel, but worse.
-The throwout bearing is carved where it touch the PP and not nice at all.
Nothing is broken and far from it, that mean it doesn't take much to have
"hunting/chatter". What Scott says is true, most of the time it's oil mix
with dust disk that will create hunting, but in my case, i'm sure that the
original trany hunting as create those "Scorch/mark/wear on parts. For a
long time i was blaming a bad clutch lever or a bad slave cylinder, in a way
i was right the first time. Now, was the clutch disk defective at first! I
have seen that before...
If you guys want pictures of everything, i can take some.
Cheers, Ben
http://www.benplace.com/vw_clutch2.htm
http://www.benplace.com/vw_clutch_job1.htm
On Wed, 7 Nov 2007 23:02:23 -0800, Nathan Mc Blain <nmcblain@YAHOO.COM> wrote:
>List,
> The good news is all the coolant repairs and parts are holding thanks to
the info gained from everyone Thanks.
>
> The bad news is my van is having clutch problems - alot of shaking when
letting out the clutch. Noticed mostly in reverse but really bad now in
first,second. Once I get going things are OK but I'm afraid of total
failure so have stopped using it. For a long time I have had a klinkity
klink like a penny in a can noise and also a screeching noise at certain
RPMS. The catalytic converter did come apart and I replaced it and emptied
the muffler. I hate to ask questions and try to just listen and learn but
now I have to ask.
>
> Some history: When I first inherited this van 2004 it started having
clutch problems-suddenly there was just very slight grab nothing to move the
vehicle. At the time this list and any knowledge of vanagons was unknown to
me. It got stuck in my uncles yard. To make a long story short he tried to
help me without my knowledge and while heavily intoxicated. He just floored
it until it grabbed layed a good strip of grass and rubber when it reached
the asphalt-not nice to my van:( At the time I thought oil was on the
flywheel and sprayed brake cleaner in the access hole with the motor
running...probably washed grease out of places it should be and other bad
stuff - stupid me!!!
>
> This Sunday I described this and everything I know to a young
professional mechanic acquaintance (execpt for the brake cleaner blunder) of
mine- he's a very good mech but not at all familiar with the uniqueness of
our vans or the expense of the parts. He's too busy to take another job but
has offered to let me pull the trans with his tools at his house. Anyway he
thought my flywheel is warped. And together we came up with the thought
that one of the dampening springs in the clutch disk may have broken. I'm
wondering if one of the springs on the clutch disk broke and is bouncing
around in the belhousing? That would account for the penny in a can noise.
Is this possible, plausible, common?
>
> While I was under there today preparing trans removal if needed -spraying
all the corroded bolts trans/engine bolts with liquid wrench. I tried
pushing up on the clutch lever to see if the slave would move and it did
with medium resistance. Is that normal? Can air in the clutch system do
this? And cause my shuttering and shaking? My mechanic acquaintance says
no what do you say? I read somehere in the archives that it could but it is
difficult to always determine fact from fiction as EVERTHING is in the arcives.
>
> FWIW:Under the boot the slave is wet- some weeping. I also have a weep
coming from the dash end of things but cannot see if it is brake master or
clutch master. So air could and probably is entering.
>
> Sorryfor the longwinded e-mail. In short:
> What's the most likely cause to severe clutch shutter?
> Do the disk springs ever break, could that be the cause?
> Is it easy to warp the flywheel?
> Can air in the clutch system be a cause?
>
> TIA,
> Nate 90 2.1L MT silver non/GL- who just wants to avoid unessisary trans
removal and fix the shaking
>
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