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Re: RE: [tech]: i'm going to cry (long)(sigh)
I agree with Shannon about the smoke. It is likely crap on the exhaust manifold. If you used new exhaust gaskets, these will smoke at first while they burn off a coating when they first set in. Don't worry. I remember the first time I saw this I freaked too. This will go away.
As to the knocking, is it a knock, or more like a tapping sound? When I swapped my head the lifters tapped for a while until they filled with oil. Once they did they became quite. Tighten the mounts so you don't have other stuff rattling around in the engine bay and try to discern whether it is a tapping sound, or a knock. My bet is it is your lifters.
Tighten the mounts and fire the sucker up!
I completed a 2L swap and when I first ran it, it ran as you describe - like it was on 3 cylinders. This lasted for about 30 seconds or so, and then it cleared right up. This is a total guess but I am thinking that the engine needs to purge air, etc. and start creating vacuum to suck in air through the air box and idle stabilizer, and until it does that, it runs poorly. - I have no technical knowledge of why this happens, or if even this is what is going on. I can only offer anecdotal evidence. I have personally completed 2 2L 16v swaps, and they both did this at first start up, and they both run fine as well.
Good luck,
Victor
>>> "16volt" <scirocco16v@scirocco16v.com> 09/04 1:40 PM >>>
Dont worry about the smoke, its just crap burning off your exhuast manifold.
http://www.scirocco16v.com/Images/new_mods/smoke1.jpg. Tighten those mounts!
Now, it sounds like you may have the timing 180 degrees out. More details of
the prob please.
Shannon www.scirocco16v.com
-----Original Message-----
From: owner-scirocco-l@scirocco.org
[mailto:owner-scirocco-l@scirocco.org]On Behalf Of Michael Abatzis
Sent: Monday, September 03, 2001 3:54 PM
To: scirocco-l@scirocco.org
Subject: [tech]: i'm going to cry (long)(sigh)
i finished my head swap today, with no joy.
the short version:
put in a new 2l 16v block keeping my 1.8 head; i get the symptoms that i'll
describe below. diagnosed as a bad rod bearing by a mechanic. put in ANOTHER
shortblock (rebuilt this time), again keeping the head. same thing. figured,
it's gotta be the head. this weekend swap heads, now using a 2l head.
ominous sign: the old head looked fine when i took it off. and yes, same
freakin' thing happened. i did reuse my head gasket and bolts this last time
'round.
what happens is that the engine will start, and run very poorly. it shakes
like a mofo (haven't tightened all the mount bolts yet, but i don't think
that's it), with no throttle response. it sputters and almost dies before it
accelerates. sounds like it's on 3 cylinders, or like it's in limp-home
mode. there is a loud, hollow, knocking coming from somewhere; it sounds
like the head but i'm not positive. if it runs long enough, thin wisps of
smoke come out the back (not a lot, but enough to make me shut the engine);
i can't tell from where, but below the exhaust manifold. wtf is going on?
i've swapped heads, and 2 blocks now. i'm getting awfully tired of this.
i've checked the timing many times, at the cam and the flywheel. i can't
really check the dpr too well, but i haven't screwed with the mixture since
the car was working. at this point i would lean towards a fuel issue, but
why the knock and smoke? running like crap is one thing, smoking is another.
smoke shouldn't even be able to get out of the back of the engine though,
right? head gasket? this is the third time i've put a head on/off, and it's
done it every time. compression seems high if anything, 210, 195, 195, 225.
the water looks clear, as does the oil (how obvious is water in oil?). a
little white smoke from exhaust on first start, but it went away. i'm still
using my old tranny, but the flywheel looks like it's moving evenly, and
there's no change when i put the clutch in or out or change gears (with the
clutch in). i'm out of ideas, time, money, and patience. i can't find a
good mechanic, but i guess i'll have to suck it up. please help if you can.
-michael
"all work and no car makes michael something something..."
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