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Old 05-19-2019, 11:20 PM   #1
Mikemiller
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Default can't access passenger rear exhaust manifold bolt

Greetings, on my 57 Fairlane Sunliner 312 cid I can't get access to the exhaust manifold bolt, passenger side, nearest the firewall. It's behind a down-tube of the manifold, too tight of a fit to allow socket. And too close to the firewall/fender well to allow a box or open-end wrench to be turned. Really don't want to pull the engine if I can possibly help it. The bolt's not frozen, in fact it's slightly loose -- I just can't get a wrench on it to tighten or remove it. On a 1 - 10 scale of mechanics, I'm about a 3.5 so what may be an obvious solution is eluding me. Any suggestions would be appreciated. Thanks!
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Old 05-19-2019, 11:39 PM   #2
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Default Re: can't access passenger rear exhaust manifold bolt

Hmm, don't recall that bolt being a problem, but can't remember what wrench I used. May have been a half-moon box end. Try that or a crow's foot.
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Old 05-20-2019, 12:09 AM   #3
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Default Re: can't access passenger rear exhaust manifold bolt

You should be able to get an open end wrench on it. The manifold may be in front of it but it's clear from the top unless your '57 is a LOT tighter than my '55. Maybe try one of those ratcheting open ends.

I'll have a look at mine in the morning...




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Last edited by Y-Blockhead; 05-20-2019 at 12:15 AM.
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Old 05-20-2019, 02:25 AM   #4
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Default Re: can't access passenger rear exhaust manifold bolt

Is the heater stuff creating access problems?
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Old 05-20-2019, 06:48 AM   #5
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Question Re: can't access passenger rear exhaust manifold bolt

Quote:
Originally Posted by Mikemiller View Post

...on my 57 Fairlane Sunliner 312 cid I can't get access to the exhaust manifold bolt, passenger side, nearest the firewall. It's behind a down-tube of the manifold, too tight of a fit to allow socket. And too close to the firewall/fender well to allow a box or open-end wrench to be turned.
Are you possibly describing a road draft tube as was used on the BIRD?

If so, either loosen or remove tube to gain access to the fastener.
Attached Images
File Type: jpg Road Draft System- 55-57 BIRD _3 (2).jpg (41.3 KB, 24 views)
File Type: jpg Road Draft Tube Install.jpg (16.3 KB, 25 views)
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Old 05-20-2019, 07:41 AM   #6
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Default Re: can't access passenger rear exhaust manifold bolt

if your trying to remove the manifold you dont need to remove it.just slide the manifold ahead as this is open.
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Old 05-20-2019, 12:49 PM   #7
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Default Re: can't access passenger rear exhaust manifold bolt

I can get a 9/16" box end wrench on the last bolt, altho it is tight. maybe with a shorty wrench would be easier.

I didn't try it but it looks like I could get a socket with a universal joint on it. Remember this is on a '55.

Darrel is correct, that bolt does not need to come all the way out in order to remove the manifold.
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Old 05-20-2019, 09:56 PM   #8
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Default Re: can't access passenger rear exhaust manifold bolt

I have always used a 9/16" box end wrench that has a wraparound handle. Don't know what they are officially called. Sorry don't have photo of them.
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Old 05-20-2019, 10:08 PM   #9
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Default Re: can't access passenger rear exhaust manifold bolt

Like this?

https://c.shld.net/rpx/i/s/i/spin/im...ei=600&wid=600
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Old 05-21-2019, 10:15 AM   #10
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Default Re: can't access passenger rear exhaust manifold bolt

https://shop.harborfreight.com/media...7/97383_W3.jpg

These is the handiest wrenches I ever bought.
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Old 05-21-2019, 11:23 AM   #11
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Default Re: can't access passenger rear exhaust manifold bolt

Mike that bolt is problematic, You have to loosen all the bolts and pull the manifold back a little at a time to get it out. When installed in the car I had to use a custom ground cut off stubby wrench. Once the other bolts are out you can slide the manifold forward 1/2 inch and it will slide off the bolt. Good luck
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Old 05-21-2019, 06:44 PM   #12
Mikemiller
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Default Re: can't access passenger rear exhaust manifold bolt

Thanks for the quick replies, I appreciate it! I did NOT know that last bolt hole wasn't a closed hole, that makes my task much much easier. I've tried u-joint sockets, 'wobbly' sockets, offset wrenches, you name it. I just bought & tried one of those ratcheting-box end wrenches but still a hair too fat to fit between the bolt and the back wall of the manifold. It's maybe a 3/8" gap. I'll keep trying; many of you have done it, I reckon I've just not stumbled onto the precise tool/angle-of-approach combination yet. Heck, now I can slide that manifold off, I may just hang this new ratcheting box-end onto the bolt before I slide the manifold back on. I'll be able to tighten the bolt, and just torch off the wrench when I'm done! Sacrificial wrenches - gotta get cheaper tools for that role!
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Old 05-21-2019, 08:38 PM   #13
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Post Re: can't access passenger rear exhaust manifold bolt

Again-

Quote:
Originally Posted by KULTULZ View Post

Are you possibly describing a road draft tube as was used on the BIRD?

If so, either loosen or remove tube to gain access to the fastener.
Quote:
Originally Posted by Mikemiller View Post

I did NOT know that last bolt hole wasn't a closed hole, that makes my task much much easier. I've tried u-joint sockets, 'wobbly' sockets, offset wrenches, you name it. I just bought & tried one of those ratcheting-box end wrenches but still a hair too fat to fit between the bolt and the back wall of the manifold. It's maybe a 3/8" gap.
What you need (IMO) is a specialty short slim open end or combination-

https://www.homedepot.com/p/TEKTON-9...8048/207112408

Maybe the last guy left it loose because he didn't have the correct wrench style.


Early tappet wrenches were of this style (slim).
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Old 05-21-2019, 08:47 PM   #14
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Default Re: can't access passenger rear exhaust manifold bolt

Grind down a "crowsfoot" and see if that would work.


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Old 05-21-2019, 09:07 PM   #15
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Default Re: can't access passenger rear exhaust manifold bolt

The wrench that Dave and Miker are talking about is called a manifold wrench. Works great for that back bolt. Miker included a photo of one.
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Old 05-25-2019, 03:19 PM   #16
Mikemiller
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Default Re: can't access passenger rear exhaust manifold bolt

Quote:
Originally Posted by KULTULZ View Post
Again-





What you need (IMO) is a specialty short slim open end or combination-

https://www.homedepot.com/p/TEKTON-9...8048/207112408

Maybe the last guy left it loose because he didn't have the correct wrench style.


Early tappet wrenches were of this style (slim).
That looks like just the ticket! I'll hit the H-D and get one today. I haven't been able to get back at it since I asked the question, so this will save me from sacrificing a wrench. Moving downstream to the heat control valve-muffler inlet pipe flange, I'm just gonna cut those bolts off with a Dremel. Fingers crossed!
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Old 05-25-2019, 03:50 PM   #17
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Default Re: can't access passenger rear exhaust manifold bolt

I worked all my life as a professional mechanic. you would not believe how many wrenches there are in my tool box that have been modified for special applications. If I were having your problem, I would get a quality, but inexpensive wrench and take it to a grinder and grind it down until it was thin enough to fit, and if necessary, heat, bend, weld or cut the wrench as needed. then, the next time you need to do the job ( if ever ) you will have the correct tool. These special made tools always come in handy for other jobs also. not just the ones you made them for. ----- Jim --
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Old 05-25-2019, 04:18 PM   #18
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Thumbs up Re: can't access passenger rear exhaust manifold bolt

Quote:
Originally Posted by Alaska Jim View Post

I worked all my life as a professional mechanic. you would not believe how many wrenches there are in my tool box
You have that right! Every new model year you had to have something new. Working multi-lines was very expensive. As for FOMOCO, I have SPECIALTY TOOLS from years ago that will never be used again unless you're into restoration/early service.
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Old 06-04-2019, 02:12 PM   #19
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Default Re: can't access passenger rear exhaust manifold bolt

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Originally Posted by miker98038 View Post

Aka a starter wrench.
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Old 06-04-2019, 08:35 PM   #20
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Default Re: can't access passenger rear exhaust manifold bolt

Bob, you jarred an old memory. I knew that once. It was buried back with tappet wrenches and monkey wrenches.
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