3.8 Mustang Head Bolt Torque. Confused?

Hi all, Any Ford techs out there?

I'm replacing a blown head gasket on my son's 3.8 liter'94 Mustang and I'm confused about the torque on the head bolts. According to the Haynes manual:

Step 1 15 ft. lbs. Step 2 29 ft. lbs. Step 3 37 ft. lbs. Step 4 Loosen the bolts 2 to 3 turns. Step 5 Long Bolts 29-37 ft. lbs. Short Bolts 7-15 ft. lbs. Step 6 Turn an each bolt another 90 degrees.

My question is is this information up to date? My Haynes manual is a few years old.

Why torque the short bolts to 37 ft. lbs. (Step 3) when the final torque is 7-15 ft. lbs.

What does Torque sequence does Ford state for the 3.8 liter?

Thanks for any help...

Confused...

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

is

Those are what's known as torque to yield head bolts. they are good for one use only since you are actually stretching them beyond their limits. You did buy new ones right?

MadDAWG

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

I ordered new bolts when I dropped the heads off at the local auto machine shop to be cleaned and checked. Should get the heads back tomorrow...

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.