my "one in a million thing"...at The Glen
b.benz at charter.net
Wed Sep 5 11:08:27 EDT 2007
I have heard of this brakage at some point in the distant past but
don't remember the context.
The NA (naturally asperated) 7A cams are longer durration than are
cams designed for FI (forced induction) and have more valve overlap,
a no-no for forced induction.
The AAN cam does not have the dist drive gear, but has some kind of a
cam position sensor thing, so would not be suitable.
On Sep 5, 2007, at 6:24 AM, Phil Rose wrote:
> Last Tuesday my car's engine quit suddenly and silently at Watkins
> Glen during a run session. The car (my Lago Blue '91 200q)) had been
> running smoothly and normally the previous day. Then, on day 2 during
> my first run session, I did 4 or 5 normal laps; in the next lap I
> powered through the "bus stop" and tracked out under medium throttle.
> Cruising around the "carousel" I eased toward the downhill apex and
> squeezed on full throttle as I passed the apex. But there was
> absolutely nothing there...no response...no bang...no smoke...the
> sound of one hand clapping? I was able to coast the car past the
> cones and onto the unused "NASCAR" straight/bypass in order to get
> off the track. After several attempts to get the engine restarted, I
> got a tow back to the garage.
> The engine turned over normally, but there was there was no spark. I
> diagnosed the problem as a broken plastic distributor gear--a good
> possibility given the fact that I carried Bernie's beautiful metal
> gear around (as a good luck charm I guess) but had never gotten
> around to installing it. Art Mayhew agreed that it would fit the
> symptoms, and I decided against trying to replace the gear at the
> track. With the help of a friend--Chet Burton--and his trailer, we
> transported the car to Salisbury Motor Car and left it on the lot at
> 9 PM that night. The metal distributor gear was in a box on the
> front seat and a note (to shop owner Art Mayhew): "Please Fix Me!"
> Well, this morning I got a call from Art to "update" me on what they
> had encountered. Art said I was right in my diagnosis of a
> non-turning distributor, but that the reason for it was "a one in a
> million thing". They found that the distributor's plastic gear was
> actually intact, but the problem was caused by the fact that...THE
> END OF THE CAMSHAFT (i.e., the cam's distributor drive) had snapped
> off! Art had never encountered this nor had he even heard of it
> happening. He's in the process of locating a replacement camshaft.
> Has anyone here ever heard of this type of failure on the 20-valve
> engine? Anyone have a spare camshaft to offer? Is it the same cam
> as on the 7A engine?
> Phil Rose.....Rochester, NY USA
> '06 A3q 3.2 V6 (5K, silver)
> '91 200q (160K, Lago blue)
> Gone to Audi Valhalla:
> '91 200q (Tornado red)
> '89 100 (Bamboo gold)
> 200q20v mailing list http://www.audifans.com/mailman/listinfo/200q20v
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