On another note. I seem to be noticing that my engine has an exhaust leak coming from the manifolds. Is this common in the 4.7 V-8? My truck has 147K miles.

I saw online the Fel-Pro gaskets for them, but unsure if the manifolds themselves rust and "give-in". (Had that experience with a Ford Mustang a while ago, where I had to replace the entire manifolds rather than a gasket).

Thanks

 

It is very common for the exhaust manifold bolt to shear off on the number 7 exhaust port. I believe it is due to poor design. The catalytic converter bolts directly to the exhaust manifold without a flex pipe, therefore the weight is stressing the exhaust bolts causing them to shear off. I have replaced mine with a grade 10 bolt, after breaking several bolts the past. Since upgrading the bolt, I have not broken any more.

 

Thanks Bajabob. i'll look into this. Will add it to the list of things to look for, once the constant abs and brake light issue gets resolved.

 

My exhaust manifold was cracked, and a few broken bolts were found when replacing it a couple of years ago. My engine has been silent ever since, used all new OEM replacement bolts.

I had the usual ticking sound before.