Manifold stuck

[jb84]

So I'm tearing down to the heads on my 93 ohv and my manifolds are stuck and I mean stuck. Soked em with pb blaster and the bolts still won't budge I have now stripped two of Them and am out of ideas anyone have any insight on this problem if you do please post something up. Until then I'm drivin the van to school. Any ideAs at all comon I know someone knows something post it up.

 

[FIND]

which bolts? The studs that hold the fuel rail down, the bolts into your lower intake manifold, or the nuts on the upper.

If you have stripped any of them, you are using the wrong size wrench or socket. Using the correct size wrench/socket will prevent stripping the heads, and it will transfer more of the torque you are applying to the bolt itself.

You need to just let them soak overnight, and go back at it. The ones you stripped, you can get a tool from the parts store or a tool store to remove stripped bolts. For the rest, be sure to use the correct socket. If you are trying to take out those studs into the fuel rail, you will need an inside torx bit.

 

[jb84]

Bolts on the side of the exaust manifold and I soked them in pb blaster overnight they are realy stuck in there good they just won't come out

 

[monkeydude3]

Are the heads on the engine or are you pulling the manifolds from the heads on the bench? If I recall correctly these have cast heads. You can try heating the bolt a few times and giving it time to let the heat soak into the threads. You can also put your socket on, and tap the socket with a hammer to break some rust loose. Exhaust manifolds can be real pains in the butt to get off on any engine.

 

[FIND]

Bolts on the side of the exaust manifold and I soked them in pb blaster overnight they are realy stuck in there good they just won't come out

Ahh exhaust manifolds.

Yeah, they are a pita.

just keep doing what you have been doing, that is what you do. But make sure you are using the correct size socket, it should be difficult to strip nuts when you are using the correct size tools, and you will have more success with correct size tools.

If you have access to an acetylene torch or similar gas air torch, and you have the space to get at it (dont know how much you have pulled out), try heat cycling them like monkeydude is suggesting. heat them till they soak in a bit of heat, then quench them.

Otherwise, just PB blast them, and attack it again a couple days later.

 

[monkeydude3]

If you have the right size socket, you are more likely to break the bolt than strip the head.

If you do start to break them loose, the thing I have done is once it moves, tighten it, then loosen it a little farther, and vice versa. This kind of helps break rust and work the pentrating oil into the threads.

 

[monkeydude3]

Ahh exhaust manifolds.

Yeah, they are a pita.

just keep doing what you have been doing, that is what you do. But make sure you are using the correct size socket, it should be difficult to strip nuts when you are using the correct size tools, and you will have more success with correct size tools.

If you have access to an acetylene torch or similar gas air torch, and you have the space to get at it (dont know how much you have pulled out), try heat cycling them like monkeydude is suggesting. heat them till they soak in a bit of heat, then quench them.

Otherwise, just PB blast them, and attack it again a couple days later.

We have some of those huge roll around torches like that at my work, which are great. Until I get one of equal caliber, I use the $20 kit from Sears that runs off small tanks of Mapp gas and Oxygen. Does not work quite as fast, but it does work and has helped me get some stubborn nuts and bolts out.