On Wed, 21 Jun 1995, W. Ray Gibbons wrote:
> On Wed, 21 Jun 1995, Greg Meboe wrote:
>
> > Ray,
> > If you say the engine is an 18GH, then I would respond that the
> > reason you can't find the timing mark on the crank pulley is because the
> > timing mark is on the bottom of the pulley. Get under the car and look
> > up and you will see the timing marks, both on the engine side and on the
> > crankshaft pulley. Commonly people think that their crank pulley and
> > engine are missing any timing marks, but that's because they're invisible
> > from the top. Even though the crank turns, the marks on the pulley
> > aren't visible from the top because they only appear on the bottom. Kind
> > of like how we only see 51% of the surface of the moon. It has something
> > to do with the rotation of the earth relative to MGB crank pulleys.
>
>
> Do you *know* for a fact that the mark is on the bottom, or is this an
> unsupported bit of speculation, for which Martin Frankford will (with
> some justice, I might say) take you to task in no uncertain terms?
>
Ray
Greg should be right, on the bottom there should be a metal plate with the
timing marks. This plate should have 5 points. Left to Right they are
TDC,5 BTDC,10 BTDC,15 BTDC and 20 BTDC. Static Ignition timing 10 BTDC,
Stroboscopic, Ignition timing 20 BTDC @ 1000 RPM with the vacuum pipe
disconected. Factory recomend setting timing staticly.
>From Bently Manual set static timing as follows
1) Check contact breaker gap setting
(To set rotate crankshaft (enginee) until they are maximumly open
and adjust to between 0.014 and 0.016 in.)
2) rotate cranckshaft until the valves of No 4 are rocking. (ie. exhaust
valve is just closing, intake is just opening). No 1. is at TDC.
3) rotate to correct timing mark.
4) Rotate distributer body conter clockwise until points are closed then
rotate clockwise until points just start to open. Alternativly conect a
12 v ligt between the LT terminal and earth) and with the ignition on
turn the distributer clockwise until the light goes out then turn
clockwise until it just lights.
5) Secure distributer in this posisition.
Hope this helps.
Gary
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