HELP 4.0 Engine Install (5-90, others)

[xjtrailrider]

5-90, Doesn't he have to have the flex plate indexed correctly to the crank in order for the CPS to have the proper signal. I always stamp my flexplate/crank with a center punch to help re-index on install, but it sounds as if he doesn't have any marks to go by! Or does it matter?

 

[5-90]

5-90, Doesn't he have to have the flex plate indexed correctly to the crank in order for the CPS to have the proper signal. I always stamp my flexplate/crank with a center punch to help re-index on install, but it sounds as if he doesn't have any marks to go by! Or does it matter?

I think you'll find that one screw is very slightly offset - at least, that's how I recall it being done.

Granted, I tend to make a chalk or paint mark anyhow - but if you replace the 'plate with a new one, doesn't your mark go away? There's got to be a way to guarantee that it goes in right, and that's usually what I've seen (saves the bother of roll pins or Woodruff keys...)

5-90

 

[xjtrailrider]

OK,Thanks, just wanted to make sure for his situation.

 

[gmcelroy]

Even though the flexplate has six screws, it will only bolt on one way. I suspose this is to index the flex plate so the CPS will work.

5-90, I believe we are both saying the same thing?

 

[5-90]

Even though the flexplate has six screws, it will only bolt on one way. I suspose this is to index the flex plate so the CPS will work.

5-90, I believe we are both saying the same thing?

Ayuh - we are. As I'd said, it's not a perfectly regular screw pattern - one of the six is offset just enough to make the rest not fit if you get it off...

5-90