(02-16-2025, 08:09 PM)tghlk Wrote: It's fixed! Somehow I got the adjustable cam sprocket 180 degrees out. When set correctly, the timing marks are on the bottom of the sprocket instead of on the top where one would expect them to be.
The stock timing marks are on the bottom of the cam sprocket, because that's where the stock pointer is. (Which is visible through the hole in the stock cover)
"Nobody can be so amusingly arrogant as a young man who has just discovered an old idea and thinks it is his own."
1983 TBird TC Clone - 1985 Mercury Marquis LTS - 1986 LTD Wagon
(02-16-2025, 08:09 PM)tghlk Wrote: It's fixed! Somehow I got the adjustable cam sprocket 180 degrees out. When set correctly, the timing marks are on the bottom of the sprocket instead of on the top where one would expect them to be.
Your original post stated, "
All I did was verify the cam timing". You didn't say anything about removing/replacing a vernier cam sprocket (which woulda been required to wind up with it being off by 180°).
BTW ~ I wuz wrong once B4, BUT........ AFAIK, the timing marks on yer sprocket SHOULD BE at the top when at TDC compression. If you rotate the engine 360°...... they WILL BE. I've never seen a vernier cam sprocket that put the marks at the bottom and upside down! <shrug>
Placerville, California
(former) '78 2.3T Courier w/blow-thru Autolite 2bbl carb ~ (current) '87 2.3T Ranger w/PiMP’d EFI
