setting timing on 3.1

[bru333]

While changing the plugs wires, etc. last time, I was going to check the timing. Hooked up the timing light and found the mark on the damper. But there isn't a scale of any kind on the timing chain cover! Now what do I do? I really need to pull the distributor and replace the o-ring, but don't want to do that until I can set the timing. This is on a '93 FWD 3.1L in a Pontiac Trans Sport.

[TheProfessor]

are there timing marks on the crank pully

[bru333]

No. No timing marks other than a notch in the damper that shows up with the timing light hooked up to #1 plug wire. The pulley is part of the damper. There is what looks like an arrow molded into the timing chain cover. But no other marks there. (If my GF hadn't lost the cable for the digital camera I'd take a picture)

[v6h.o.]

I honestly cant remember what there should be down there as per marks.

Its been ages since i've worked on the old Iron headed 3.1's in those vans....

[robby1870]

I thought there were marks on teh block beside the timing cover.......but I cant remember, that maybe how my dad's toyota is done......

[geoffinbc]

If there is no pointer your screwed. You may need to make a TDC mark and get a timing tape or something. The idea is that the engine NEVER needs to be adjusted. And really it does not for normal operation.

[bru333]

Well...if it never needs to be adjusted, I'll just assume where it is now is the correct timing and mark the cover, so when I pull the distributor to cure my oil leak I'll be able to set it back correctly.

[geoffinbc]

Oh thats the problem. Ok well somewhere there should be a TDC mark. Even if there is no pointer. Or else just use a sharpie and mark the block and then mark the dizzy aswell.