So the whole time that I was rebuilding carbs for my dual manifold for the '49 dodge there was no guarantee it was for the 25 inch engine.
It is... BONUS! time to fabricate the linkages etc I guess...
Anyway, I want to separate the two manifolds, the 4 long bolts are seized solid, Nuts came off fine on the bottom, but when you turn the tops if they turn a bit, the bottoms dont. Obviously I'll
want to get the bolts out, because I will be installing a plate. The Edmunds manifold is water heated...
So, suggestions? I'm thinking put this thing in a pan and get soaking with ATF/toluene (makes a good penetrant I heard). I really only have one of those stupid little hardware bottle torches for heat, not sure how that will go.
I'm tickled to death that the dual carbs fit. I might have to re-fabricate a narrower heating duct though.
Try soaking it in Coke...not the nose coke..the drinking coke..leave for a couple hrs..head over to the church say a little prayer...then come back and try it ..If you need some serious heat ..I have real torches..
if you have a drill press or know someone who has one.I say drill press as easier to keep bit centered then drill the head of the bolt using gradually bigger bits.this will a lot of times remove the tension between bolt and hole it is in.try turning bolt when you feel that you have removed enough material to still have enough material attaching the bolt head to rest of bolt.worst case bolt head shears off then continue stepping up drill sizes until bolt is no more a lot of times I have had bolt come out once you have drilled enough away
If I understand this right, you already have the nuts off so the only thing holding the bolt in place is rust.
I'd start by adding some heat (propane torch should do if that's all you have) and then hit the end of the bolt (obviously the end the nut came of off) with an air hammer with flat tipped tool in it. Wouldn't hurt to drop in some WD40 or melt in some candle wax also. Air hammers can be bought cheap at Princess.
It's not like they're stuck in any threads (again, if I am understanding this correctly), it's just the bolt stuck in a hole.
Tippety tappety tap tap and out she'll drop ....... (maybe)
Soak the bolts in penetrating oil, and let sit for several days. While soaking, put the nuts on to protect the threads and wack with a hammer a few times to loosen and help the penetrating oil penetrate. After a few days, they will probably start moving when you hit them with a hammer, and you can try taking the nuts off and driving them out with a drift or air hammer.
Heat will work also, but a propane torch won't have the heat output on a piece of iron that large to expand the holes enough to loosen it.
I may need to find a new manifold though, I noticed a crack! very fine though...
Can it not be welded?
Depending where the crack is, JB Weld might wiork
Anything is fixable. I didn't think JB weld would stay on an exhaust manifold :) I've seen cast iron repaired, so I can go that route if need be. Usually its easier to go find a non-cracked manifold.
I may need to find a new manifold though, I noticed a crack! very fine though...
Can it not be welded?
Depending where the crack is, JB Weld might wiork
Anything is fixable. I didn't think JB weld would stay on an exhaust manifold :) I've seen cast iron repaired, so I can go that route if need be. Usually its easier to go find a non-cracked manifold.
Maybe I missed something along the way but, if you are putting a aftermarket intake on it and the exhaust is cracked why wouldn't you locate a split exhaust manifold.
IMO those old flathead sixes sound cool with split manifolds.
If the crack is very fine and is captured, just ignore it as it probably has been there for decades. If the crack is open (where it ends in a bolt hole or at the edge of the casting, you can braze it after finding the other end of the crack and drilling it, and then grinding out the crack in a V shape.
Maybe I missed something along the way but, if you are putting a aftermarket intake on it and the exhaust is cracked why wouldn't you locate a split exhaust manifold.
IMO those old flathead sixes sound cool with split manifolds.
TMJ
If i can find em.. was going to have this one spilt. :)
