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Re: more VR6 Question
> >> Is the VR6 DOHC ?
> >> I think it is a SOHC ,but at the cylinder head ,there is
> >> a big "DOHC" on it.
> >> Yes it has two camshafts ,but in V engine ,it should has
> >> four to become a DOHC ,right ?
> >VW blatantly claims DOHC on the covers, which by their definition would be
> >"it has two cams of the overhead variety..... " By all definitions of the
> >motor itself it is a single overhead cam v6 (narrow or not)........
your biases are starting to show. it used to be that SOHC/DOHC would mean
number of cams per bank, but we now have "quad cam V6 or V8 engines"... does
that mean 4 cams per bank? if you want to flame VW, you should also flame
every one else.
> I'm not very familiar with the VR6 except that it's a narrow "V"
> engine. Are there two separate heads on it, or is it narrow enough that a one
> piece unit incorporates the combustion chambers, valves and cams for both banks
> of cylinders?
it is narrow enough for one head, one valve cover. if anything calling it
DOHC is probably more accurate because one cam operates intake and the other
operates exhaust, much more like a straight six.
> This is the only way, and it's stretchin' the diffinition, that
> VW could claim the engine to have "DOHC's" if there is only one cam over each
> row of cylinders. Is it a one piece casting??
there are two cams in all. perhaps that should be the only description
that should be used.
i don't see the point getting all hung up over marketing terminology.