[evilws6]

Hello again everyone.

First let me start off by saying that my car has been an absolute friggin' nightmare this past week. I was ONE stud away from having the factory manifolds set and ready to go back in, and then realized the stud was rusted stuck into the manifold. We tried everything to get it out, no luck. Now I'm debating finding a driver's side manifold to replace it with, or to get headers.. which means I would need a whole new exhaust. I want something to bolt in and be done - no more exhaust shops, no more outrageous costs for labor.

The car is a 1970 Malibu sedan with a 307. Before I even further consider headers, are there ANY other headaches with installing them? In my 73 Camaro, all I had to do was jack the motor up a little bit and they went right in. How is it installing them on a small block '70 chevelle? If I need to remove steering components, then screw it, I'm not getting them.

Anybody have drivers side exhaust manifold? Are the manifolds interchangeable between the 307 and 350?

Thank you everyone, I think I need a nap now.

 

[novaderrik]

use a torch to get the material of the manifold around the stud cherry red, then use a pipe wrench with steady pressure to break the stud loose... make sure to put the pipe wrench up tight against the flange so you don't put any sideways pressure on the stud and break it off.. stud should screw right out... then after the manifold cools down, run a tap thru the threads to clean them out and screw a new stud into place..

but headers aren't too hard to do, either- worst case, you'll have to drop the oil filter and starter to get them in, but they will slide right up from the bottom.

 

[blasttime]

X2 Fix your manifold

 

[evilws6]

I would love nothing more right now than to fix my manifold, but there are are no threads left. there's about an inch of the stud sticking out. I brought it to a friend's house, and we welded on a nut to the stud (3 times) and the welds broke each time before the stud would even loosen at all. Eventually, the welded nut broke off with more than half of the stud. Then, we drilled the proper sized hole for the specific easy out we were using, and then tried that... and it broke in the stud. We tried nearly everything except getting it literally cherry glowing red.

Now I'm back home with this, and nothing but a propane torch to heat it up with:

It's destroyed. lol

 

[VenomGT]

Cut it flush, punch a guide dimple and drill it out start with a small bit and work your way up.

 

[evilws6]

Cut it flush, punch a guide dimple and drill it out start with a small bit and work your way up.

Then what do I do once it's out? Heli-coil and tap it? (which I don't have the tools for)

 

[mrchevyl88]

it is not destroyed. put mainfold in a 5"to 6" vise with pipe flange up. heat materal [around broken] stud cherry red with accleane torch ,use a 16" pipe wrench.

 

[MarkP]

After you see how easy the stud will come out when heated cherry red, you'll be amazed. Don't try anything else. Find a torch.

 

[El Guapo]

Fixing a manifold (or even replacing it) vs a new set of headers and new exhuast? I'd go with the manifold fix. Yeah, a SBC in a Chevelle header installation is not that difficult (dropping the oil filter and starter help). I think Jegs even has a complete headers and exhuast kit for a Abody, that is not very expensive (or was it Summit?). That, would involve replacing everything exhuast wise....vs fixing a manifold. Sure you could put headers on and gi-Jiffle a exhaust system connection, but sometimes that is just hokey (but you may end up doing that). All in all, nothing is hard to do, just gotta wrap your head around fixing it.

 

[jjjcamaro]

U also could find a cheap set to buy

 

[hmardown]

Heli-Coil can be bought separate. it's comes in a little kit for each particular size you want.
hmardown

 

[77 cruiser]

Do like they said cherry red. Propane torch ain't gonna cut it.

 

[malibu356]

pick up can map gas that will get it cherry red, put the time into it..

http://www.acehardware.com/product/index.jsp?productId=38350316

 

[RB69SS396Conv]

Cut it flush, punch a guide dimple and drill it out start with a small bit and work your way up.

^^^ This ^^^

Heat "works" but weakens the metal. The drill method OTOH is basically idiot-proof. In fact, it's almost even RB proof; I've managed it on MANY occasions.

Just go to the parts store - even AZ, Advance and such will do - and buy a 3/8"-16 Heli-Coil kit. Comes with everything you need; the right final drill size, the tap, some inserts, the tool for screwing them in.

 

[novadude]

Maybe I am wrong, but I would think 64-72 SBC chevelle manifolds are dime-a-dozen. For < $50 you can probably find better manifold and save yourself headaches.

You don't want to know this, but we scrapped out a few sets of those 5 years ago.


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[HKalin]

Am I missing something here or shouldn't the hole in the manifold be a straight hole with the threads in the head. I would try the torch first also and if that doesn't work cut the stud as close to the manifold as possible and drill the hole out increasing the size of the drill has you go. As you get closer to size and the wall of the bolt decreases it may grab and pull the rest of the bolt out. I don't want to rain on your parade but did you check the hole where that bolt goes into and make sure you don't have the other end of the bolt still stuck in the head. Like I told you before your in the one step forward two steps back mode.

 

[evilws6]

I didn't want to get another manifold because I couldn't find the same kind, only smog style ones and they were like $75 and up.

We got it fixed today good as new. I ground it down flush with the flange and drilled it out. 3/8 - 16 tap said to use 5/16 drill bit, so then we did that and ran a tap through it. It grabbed the original threads and took out the old material that was in the way. Back in business! Thank you guys!