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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
Because the torque spec on the headgaskets is for an unloaded head. If you have pushrods that are tight against the rockers, you're creating backpressure against the bolts, and it will show correct torque early.
Car has had 24lb'ers since the day I started owning it and ran beautifully. No problems whatsoever and that was back when it was stock.
Should I have uninstalled the rockers before I put on the heads?
Unless you added and subtracted , multiplied then divided to get the extra torq needed to compensate for the pressure pushing up from the pushrods,,(as if that were possible) you need to pop the rocker covers of and loosen the rocker arms then re check the torq on the heads.
unless you got lucky and went past the proper torq for the heads to begin with, i wouldn't feel good about it! Do what you want, but i wouldn't chance having to redo head gaskets just to not have to torq the rockers!!
On the back of the drivers side head there's a hole that needs plugged. I did the same thing. It idled like it had a cam in it plugged the hole and smoothed right up.