I replaced lifters, and rods, heads, intake and fuel injection on my 5.2 liter. I am blowing oil i am assuming through one of the gaskets. What is the best way to seal the intake gaskets between the steel heads and aluminum intake? I used Felpro gaskets.
What should the torque spec for the intake be? Maybe i did not get that right.

 

Have you replaced the intake plenum gasket? The intake plenum is the very bottom of the intake manifold. These are a trouble spot for leaks. For the intake manifold it is something like 20ft lbs. It is written on the intake it self. Also check the service manual located in the FAQ in this section for all torque specs.

 

Download the 95 FSM in the FAQ there is a sequence to tightening both the plenum and manifold bolts, they also need to be torqued in steps, you'll need an in-lb torque wrench.

The intake (not plenum) bolts are IIRC also torque to yield bolts and should be replaced when they are removed. I like to use Permatex Gasket Sealant to hold everything in place and Permatex Right Stuff RTV in the 4 corners. If I can get into the garage this weekend I'll be doing a write up on a water pump and plenum replacement.

 

No, the intake bolts are definatley not TTY!!! Those would be the head bolts your thinking about.

 

Maybe I replaced them for a different reason on my old truck then and forgot why, lol. There goes my perfect streak the wife will be disappointed.

EDIT: just remembered I used a billet pan from APS Precision last time and it came with new plenum pan bolts that's what I was thinking of, the TTY not sure where the heck I got that from.

 

I did not replace the plenum gasket come to think of it. Could that suck oil between the runners..i guess it could the way it is designed....

 

Yes, Magnum engines will blown that gasket and suck oil. Pretty much every single Magnum out there has blown the plenum gasket at one point.

The manifold bolts are 12 ft-lbs I believe and need to be tightened in the proper sequence.

 

Plenum bolts are stepped from 24 to 48 to 84 in-lbs and the intake bolts are stepped from 72 in-lbs to 12 ft-lbs like mentioned there is a sequence to it.

 

thanks for the plenum info and the tightening sequence guys. I am sure it is some of my issue then. I did the 12 ft pounds but all at once. The engine is strong except for that part.