I thought when I got to the point of installing the new timing chain and sprockets on my 88gt that the proper alignment of the sprockets would obvious. I sure don't want to screw this part up so I am asking even if it is a stupid question. At this time, I have both old sprockets removed. My timing had jumped so I know the relative positions of the crank and cam shafts are not right. Can someone please show me a helpful photo or describe the answer?
Thanks Larry, Looking at the sprockets I see that the original large on has sort of a mirror image tooth for a mark the matches the dot on the new one. The old and new small sprockets are identical minus wear. On all of these sprockets, the marks are centered on the teeth. I will proceed with them facing each other as you say.
Here's a pic from my collection. You'll note that because it's a chain drive, that both dots are on the teeth (not one on a tooth and one on a valley as Larry mentioned). The dots are only as he specified when it is a direct gear drive without a chain.
And here's a photo of an '88 engine I overhauled a couple years ago. You'll note that the new timing gear set didn't have a dot on the cam sprocket, but rather a cast nib. The dot on the crank sprocket isn't visible in this photo.
Pyrthian and Bloozberry are both right. That said, it's your call whether you want to set the timing for TDC #1 or #4. Just remember to set the distributer accordingly.
And after you install the timing chain, you can turn the engine manually to whichever spot you want. So, for example, you could install the gears with the marks facing each other, then rotate the crankshaft one turn to put it at TDC #1.