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Unread 01-12-2010, 11:25 AM   #1
CoastieCJ
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Pull head with intake/exhaust attached?

Like the title states, is it possible to pull the head on a 258 (currently with mopar MPI) with both intake and exhaust manifolds attached? I've got a hoist and this seems to be a much easier solution than trying to mess with all the lower bolts. I'm assuming I'll need to unbolt the PS pump bracket, disconnect the wiring harness and fuel lines. Anything else?
Thanks!
-Lloyd

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Unread 01-12-2010, 12:11 PM   #2
trillobite
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What's your plans on disconnecting the exhaust pipe from the header? The worst part, is getting that re-attached. I spent a hour trying to get those two flange bolts to line up. I ended up cutting the exhaust pipe, bolting it up, and re-welding the pipe.

On the manifolds, I used a 5" 1/4 drive extension, snaked in there, to get the tricky manifold bolts loose. I had to pull the carb to get any decent access, though.
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Unread 01-12-2010, 12:55 PM   #3
CoastieCJ
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While I've got the head off, I'm going to swap it out for a 4.0. If it can be done with the manifolds bolted to the head, I'll just switch everything over and then put it back in. The current exhaust is fully welded, so I'll need to cut it, put on the new 4.0 downpipe and then take it to a muffler shop to re-connect everything.
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Unread 01-12-2010, 01:11 PM   #4
TRex
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Quote:
Originally Posted by CoastieCJ View Post
While I've got the head off, I'm going to swap it out for a 4.0. If it can be done with the manifolds bolted to the head, I'll just switch everything over and then put it back in. The current exhaust is fully welded, so I'll need to cut it, put on the new 4.0 downpipe and then take it to a muffler shop to re-connect everything.
I'm sure working on the heads can be done without removing the engine but I think the problems you may run into will be:
1. Safely handling the weight of the heads while removing/installing
2. Completely removing the old gasket from the block (you'll be super cramped).
3. Replacing the gaskets and situating the heads without damaging either.

That said, I'm sure a number folks have done it successfully. I'm just giving you a heads-up on the issues you may encounter. Take your time, use the correct tools (hint: engine hoist) and be diligent and you should be good.

Best of luck!
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Unread 01-13-2010, 06:15 AM   #5
Mike Romain
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I do it usually. I also like to have a helper or a hoist when putting it back on so the headgasket doesn't get damaged, sucker is heavy.
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Unread 01-13-2010, 11:56 AM   #6
Cutlass327
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If I had to pull the head for a head gasket or something like that, I'd do it with the manifolds attached. If you could, even use a couple studs (or cut heads off a couple old head bolts) to help align as it is lowered on. Just make sure you are able to remove them once the head is in place.
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