Re: 4.0 manifolds on a 258 head?
Posted: December 2nd, 2009, 7:00 pm
You need to torque them to the 4.2 specs, for the smaller bolts, if you torque them to the 1/2 bolt spec you may very well stretch them beyond the yield point!salgofnir wrote:Have been reading a little this evening. It seems that since I have an 81 with the 7/16 head bolts, I should torque to the 4.2 specs and not the 4.0. Is this correct. I also saw where you torque the outer 4 to 4.2 specs and the inners to the 4.0 specs. Which is recommended here.
The '99+ injectors have a different plug on them than the earlier ones and are not a direct fit, they can be modified to work.