Decked head changed timing

[Guest]

All,

I just put a head that was shaved 0.030 onto my 1100. I suspected this might change TDC in relation to the timing mark. It did. At TDC the 1-4 T mark on the sig gen plate is now about the width of three lines to the right of the reference mark. I thought I would reset the cams, but at this 3-line distance the cams barely moved. Can I solve this by just moving the timing plate?

 

[Guest]

Tdc should not have changed, your cam timing will. To correct this, you'll need to degree the camshafts. Jerry

 

[Big T]

The crank determines TDC, not the head
and what Astro said

 

[one_civic]

I would also check your piston to valve clearance with any head that's been decked over 0.020",

buy a degree wheel and blueprint the engine

 

[posplayr]

OP claims the timing mark moved after changing the head. I would ask in relation to what? As stated and reiterated it can't be tDC. I have seen 1100e timing plates that are near the ends of theirs slots when set to proper timing but again neither cam timing or movement of this plate will change TDC.

when degreeing the cams it is wise (especially on pre 83 1100e) to measure TDC on each cyclinder to detect crank twist. Double check the timing plate mark as well to insure it is properly alighned.