Hey all, new to the site. 1997 F150 XLT 4.6.

I wonder if anyone can point me to a reliable online reference containing torque specs for this engine. The site I used earlier today turned out to be unreliable, and I sheared the head right off the bolt I was trying to tighten. I don't want to make that mistake again, but I also would prefer not to shell out 60 bucks for a shop manual just to get torque numbers.

In case anyone's feeling charitable and has an offline reference handy, I'm looking for the following torque numbers:

Intake plenum to intake manifold
Throttle body to intake plenum

Also, if you needed to replace a TB-to-plenum bolt (or all four, since the three that didn't break are probably stretched), where would you shop for them?

Thanks in advance!
-Charley

 

Another thing to consider, is your torque wrench accurate.

 

That's a good question, but I believe my torque wrench is fine. Since submitting my post yesterday I found the torque specs I needed in my Chilton manual - they were just in a different chapter of the book than the one I was working in. And the manual's spec for the bolt I broke is much lower (80 in-lb) than indicated by the web site I consulted (192 in-lb). I think the disparity is plenty sufficient to explain the broken bolt.

In case anyone's wondering, the web site I used was torkspec.com. I'll avoid it in the future.