Exhaust Manifold Woes

[biloxiriver]

Surely someone out there has had this problem!! Trying to remove old manifolds off 302 inboard. Allen head bolts, several heads no longer exist; can't get anything on them or in them! To little space for grinding! Any thoughts? I await your assistance.

 

[Ryoken]

Re: Exhaust Manifold Woes

diegrinder with a carbide burr... <br /><br />i've also torched heads off like that, but you need to be precise and quick if you want to not harm the manifold pocket surrounding the head....<br /><br />you may also want to consider a set of twist sockets like these, saved my tail many a time..<br /><br />http://buy1.snapon.com/catalog/pro_det.asp?P65=&tool=hand &item_ID=65855&group_ID=11664&store=snapon-store&dir=catalog<br /><br />if there is anything remotely resembling a head, these will bite and take them out.. i believe Sears sells a cheaper set...

 

[mercrewser]

Re: Exhaust Manifold Woes

You may have to pull the engine.

 

[biloxiriver]

Re: Exhaust Manifold Woes

Thanks for the quick response to both of you. I will see about a diegrinder first, for the three with no heads left. Still open for any other thoughts.

 

[cjflanagan]

Re: Exhaust Manifold Woes

I would drill the stripped allen heads with a 1/4" drill. Then use a 1/4" reverse thread stud/bolt extractor to remove it.

 

[biloxiriver]

Re: Exhaust Manifold Woes

Boiling Point 212, that is one of the options on my list, thanks for the input.