One mark is TDC Cylinder #1, the other is TDC Cylinder #6. PRV wierdness (it's a good engine, but definitely has its quirks). The two marks are 150 degrees apart. Look at the pulley with them located 2:30 and 9:30 -- TDC #1 is to your right and TDC #6 is to your left. If your timing scale hasn't been monkeyed with you should be able to time the ignition off whichever wire is easiest to access (you may find that to be #6). If your timing scale needs to be re-indexed, the PRV does have a nifty way to do so: on top of the engine are two block plugs. The one closest to the front (our back) accesses the oil galley. The one closest to the back accesses a crankshaft counterweight, into which an 8mm indexing hole is pre-drilled. Rotate the engine close to TDC #1 (no more that 20 degrees BTDC) and insert a foot long 5/16" drill bit through the rear hole. The bit will ride on the counterweight. Continue rotating the engine until the bit drops into the indexing hole (8" or so down from the top of the engine). Cylinder #1 is now TDC, and the timing scale can be positioned accordingly. Crankshaft pulley is of course keyed, and does not have a harmonic balancer, so you shouldn't ever need to worry about the timing marks themselves. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "Matt" <supermatty@xxxx> wrote: > Seems like this topic has come up before but I haven't found anyone > post an answer. Which of the marks on the crankshaft pulley is the > one for cylinder #1? When I look at my pulley, both of the marks > seem to be located within the same 180 degree semicircle. In other > words, the two marks are not at opposite ends of the pulley. Could > someone please describe which one is correct? I'm trying to set my > ignition timing. > > Matt > #1604 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/