On Monday 17 November 2003 08:03 pm, Gnarlodious wrote:
> > My question is, what's the starting procedure using the "knob," or more
> > properly, does use of the "knob" contribute to the cutting down of
> > smoke upon startup?
>
> Yes, it gives you more fuel which assists in more complete combustion. But
> only while cold.

My understanding is it doesn't provide more fuel, but instead advances the
timing by five degrees at low RPMs.  The idea is that when the engine is
cold, the fuel needs more time to combust completely.  I find mine smokes
less when cold with it out, but knocks less when warm with it in.

Incidentally, I think this is pretty much an on/off thing; I don't think
"easing" it in helps any like it would with a gas engine choke.  I just shove
it back in when the engine coolant temperature gauge gets up to the white
line.  (VW doesn't say specifically when, but referencing it to the temp
gauge keeps me from forgetting to push it back in. ;)  Also, if I shove it in
too much before that the idle is kind of uneven...my engine has low
compression on at least one cylinder, I think.)

VW calls it a "cold start device", since it's not really a choke as such.
They also warn in a revised starting procedure that pulling it out at
temperatures below 15F may keep the engine from firing; in that case they
suggest leaving it in until the engine fires, then pulling it out.

> > But there's still a small
> > nagging leak at the flywheel-end seal
>
> Me too. That leak is a real bitch. Plan on control not elimination.

I've got it too, but in my case it's contaminated my clutch (bad shuddering
on take-off, unless the van's good and warmed up) so I'm going to have to
have it fixed.  My leak is really bad, though...I'm going through a quart of
oil in 200-300 miles.  Some of that may be getting burned, but the engine has
no tendancy to run away so I think the majority is leaking.

David Brodbeck, N8SRE
'82 Diesel Westfalia
'94 Honda Civic Si -- For Sale
'86 Volvo 240DL wagon