LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Differences in '95 and '96 Crankshaft hub?

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Old Nov 28, 2007 | 03:18 PM
  #1  
2QUIK6's Avatar
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Differences in '95 and '96 Crankshaft hub?

Since the '96 has a crank position sensor, is there a difference in the hub and the TDC pointer on it compared to that on a '95 LT1?

With the pointer at 12:00 then #1 and #6 are TDC?
And the same cyls when at 3,6,9:00
Old Nov 28, 2007 | 04:52 PM
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The 96 is shorter because of the reluctor ring the goes in between for the crank sensor to pick up a signal from
Old Nov 29, 2007 | 08:11 AM
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The TDC pointer should be in the same position on all years, even though they changed the shape and length of the hub with the various years. But the pointer is not reliable, because the hub is not keyed to the crank.
Old Nov 29, 2007 | 09:14 AM
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Thanks Fred. I think I figured it out, didn't need it to be exact, but with the headers off and watching the exhaust valves open/close as I rotated the crank I determined it to be in the near correct oreintation..just doing a leak down test while I have the headers off on the truck..so far the right bank is all 5-10% with over 120k miles on the short-block! The '95 TA had 15-20%.
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