Vacuum problems?? - Page 2 - Vintage Mustang Forums
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post #16 of 46 (permalink) Old 08-29-2019, 02:51 PM
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Here is a nice little test on penetrating oils


I am pretty embarrassed to have purchased a $19 can on Kroil.

Chris (Sussex, WI)

289 w/AFR 165, T-5z, 3.55T-loc, Granada Discs and 6 bolt Moto-Lita Steering Wheel

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post #17 of 46 (permalink) Old 08-31-2019, 12:15 PM Thread Starter
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I wonder if my problem has to do with locking tabs on the exhaust manifold bolts. The Shop Manual says to bend them back before removing the bolts. I can't tell if I have them on there or not. Of they are, then they are all under where I can't see them. I think maybe I can feel one on the one bolt I've been trying to loosen but I can't get a very small screw driver to catch it to bend it back.

I got a 17/32 3/8 drive 12 point and tried it this morning. It fit on pretty well but rounded it off when I gave it some torque. I guess I should have waited to find a 6 point. I'm about to give this up or find someone who will take it on. Anyone know of a shop that would attempt it in the St. Louis area?

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post #18 of 46 (permalink) Old 08-31-2019, 12:41 PM
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I'm not sure if Ford used a gasket there, originally, or not. After removal, give it a good hard look over.

FWIW, when faced with the possibility of snapping a bolt off in the head (with my luck, usually either flush or worse), I've resorted to lopping the heads off the bolts, removing the manifold, then using heat and my stud remover to get the remainder of the bolt(s) out in one piece.


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post #19 of 46 (permalink) Old 09-01-2019, 07:50 AM Thread Starter
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I'm starting to look at new manifolds if need be. I see Summit has one for 200 CID 6 cyl but the years of application listed are for 1964-67. Is the 68 manifold different?

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post #20 of 46 (permalink) Old 09-01-2019, 12:39 PM Thread Starter
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Here is a pic of a 6 cyl bolt set. I don't see any locking tabs like for a V8 in the 2nd pic. Can I assume a 6 cyl didn't have them?

Also if I apply heat, using a propane torch like I use for sweating copper pipe, where would I direct the flame? Onto the manifold or where the manifold meets the head?
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File Type: jpg Exhaust Manifold Bolts.jpg (35.5 KB, 1 views)
File Type: jpg Exhaust Manifold Locking Tab set V8.jpg (39.8 KB, 1 views)

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post #21 of 46 (permalink) Old 09-01-2019, 05:44 PM
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I'm starting to look at new manifolds if need be. I see Summit has one for 200 CID 6 cyl but the years of application listed are for 1964-67. Is the 68 manifold different?
Yes, the 68-73 manifold has a larger outlet, and the exhaust system was a larger diameter.

Amateur restorer. Well, sometimes I have been paid for it. But not right now.
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post #22 of 46 (permalink) Old 09-01-2019, 08:42 PM
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Why do you think you need a new manifold? If in doubt about the "flatness" of the sealing surfaces just run it down to your machine shop and have them surface the flanges.

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post #23 of 46 (permalink) Old 09-01-2019, 09:13 PM Thread Starter
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Why do you think you need a new manifold? If in doubt about the "flatness" of the sealing surfaces just run it down to your machine shop and have them surface the flanges.
Once I get it off I plan to do that unless it has major cracks. I'm just looking at options ahead of time.

Thanks

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post #24 of 46 (permalink) Old 09-02-2019, 07:32 AM Thread Starter
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How good are those bolt extractor sockets? I've been watching uTubes on them. I'm going to try to wire wheel the heads I can get to today and see if I can't get a 1/2 inch 6 point on them but if not maybe I'll try those extractors.

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post #25 of 46 (permalink) Old 09-02-2019, 07:42 AM
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Don't be afraid to hammer a socket onto the bolt head. Usually a 12 point works best for this. Maybe a 13mm 12 point would get you there. Go down to your local hardware or home improvement store and pick up a couple varieties of socket around that range. I find that sometimes one socket will work, but the identical size in another brand won't. Once you have the bolt out, you can clamp it in a vice and lever the socket off.

Nothing worthwhile is ever quick, cheap or easy, those that can't do, complain

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post #26 of 46 (permalink) Old 09-02-2019, 04:57 PM Thread Starter
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Well it's off. 5 Bolts broke off. Three I think are long enough to get out but one is only about 1/8 inch out and one is flush. I'll try an easy out with those. Worse case scenario I'll have to drill and tap. What is best way to get the studs out that stick out a bit? One is 2 inches, one is 3/4 inch, and one is about 1/4 inch out. I've doped them all up with more Liquid Wrench now that I can get to them better.

The manifold looks pretty good still but probably will need resurfacing and truing up.
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File Type: jpg Exhaust Manifold off.jpg (655.0 KB, 5 views)
File Type: jpg Exhaust Manifold removed.jpg (549.7 KB, 6 views)

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post #27 of 46 (permalink) Old 09-03-2019, 05:36 PM Thread Starter
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It looks like those exhaust manifold bolts are 3/16 diameter. What size easy-out should I plan to use? The Irwin #1 uses a 5/64 drill bit. Is that too small?

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post #28 of 46 (permalink) Old 09-03-2019, 06:33 PM
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Well it's off. 5 Bolts broke off. Three I think are long enough to get out but one is only about 1/8 inch out and one is flush. I'll try an easy out with those. Worse case scenario I'll have to drill and tap. What is best way to get the studs out that stick out a bit? One is 2 inches, one is 3/4 inch, and one is about 1/4 inch out. I've doped them all up with more Liquid Wrench now that I can get to them better.

The manifold looks pretty good still but probably will need resurfacing and truing up.
On the short studs..and the flush one... weld a nut on to what remains. Use a wrench to spin out.

Bart

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post #29 of 46 (permalink) Old 09-04-2019, 09:42 AM
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It looks like those exhaust manifold bolts are 3/16 diameter. What size easy-out should I plan to use? The Irwin #1 uses a 5/64 drill bit. Is that too small?
Exhaust manifold fasteners are 3/8"-16 thread.

Nothing worthwhile is ever quick, cheap or easy, those that can't do, complain

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post #30 of 46 (permalink) Old 09-04-2019, 09:49 AM
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It looks like those exhaust manifold bolts are 3/16 diameter. What size easy-out should I plan to use? The Irwin #1 uses a 5/64 drill bit. Is that too small?
Yes. I would use a #2 spiral extractor (7/32" bit). Frankly, I'd try and avoid using a screw extractor at all.... if you break one of THOSE off you're really (pardon the pun) screwed.

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