The rear upper right side manifold bolt came out on my 2000 Durango 4.7L. After reading all the posts on manifold issues I was sure this had broken but luckily it apparently vibrated out. After searching all over for thread data on these bolts, I bought a bolt from the dealer and here it is. The 4.7 uses a combination of bolts and studs to attach the manifold. The bolt I got from the dealer cost 1.95 plus tax. It is M8 x 1.25 x 50mm. I have seen a few posts stating that this bolt is a 5/16 but this one is not. You can probably get a 5/16 bolt to thread in but it will tear up the existing threads on the block.

 

https://dodgeforum.com/forum/dodge-d...s-section.html

ill move it for your this time.