No start after TB????We Got Fire!!!!

Tony Hoffman auditony at
Fri Oct 23 01:27:40 PDT 2009


I'm also sorry to hear about your accident. As Steve said, hopefully
you make a quick recovery.

As for the car, the 200 20V does have a distributor, but in fact, it
runs off the cam. So, unless the cam is off, or the dizzy is removed,
there is no chance that the ignition timing will be off without a
corresponding cam timing issue. Just like what you were saying in
reference to the 10V engines. BTW, the S4/S6 20V engines went to
distributor-less ignition.

As for the crank, as long as it's at TDC, it doesn't matter. IOW, you
can turn it as many revolutions as you want, but if it's at TDC, it's
all the same. The camshaft, on the other hand, can be off 180degrees
in phase, since it's TDC mark passes twice for every one on the
crankshaft. However, that being said, an interference engine such as
the 20V should not have either rotated significantly without the
other, or meeting of the pistons and valves can occur. Nothing good
ever comes of that situation :(


On Fri, Oct 23, 2009 at 1:01 AM, urq <urq at> wrote:
> First and foremost ... I am sorry to hear about your unfortunate injury
> Kneale!  I've been there in my own way, so I know what it is like to be out
> of commission for a while.  I do hope that you are able to recover quickly
> with no serious long term effects!  I wonder if you're having the same
> experience I did ... when people found out I had broken my leg, many jumped
> to the conclusion that I hurt myself while riding the motorcycle ...
> I have been racking my brain trying to understand this 180 degree phase
> relationship between the crank and cam.  Such is the nature of a four-stroke
> motor, the crank performs a full rotation twice for each rotation of the cam
> ... it sure seems to me that if you spin the crank 360 degrees you'd make up
> that 180 degree cam "offset."  I thought about it and had almost convinced
> myself that there was some sort of "distributor" alignment issue (in quotes
> because I know your 20v has no dizzy).  I don't know if your car has a cam
> position sensor on the pulley or in the location the distributor is usually
> found ... but I realized that this should match the cam phase.  The cam
> alignment reference I'm familiar with is on the 10v, where the mark on the
> cam pulley is aligned with the deck on the head ... is it that you had the
> alignment mark on the opposite side of the motor?
> Not a big deal, but it sounds like something someone else has suffered, and
> without a doubt others will ... it'd be good to have this one in the old
> brain box for reference.
> Steve Buchholz

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