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 Post subject: Exhaust Manifold Bolts
PostPosted: Wed Dec 14, 2011 5:48 pm 
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Turbo EFI
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Joined: Wed Mar 25, 2009 5:56 pm
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Location: TEXAS
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Is there a Slant 6 Exhaust Manifold Bolt? Where the manifold attaches to the flange. Or can the muffler shop just put on whatever they have laying around? Reason I ask, tonight I was pulling off the intake & exhaust and the nuts and bolts holding on the flange were not SAE or metric! I took a Sawzall to the exhaust pipe(which was junk anyway) to get it off. I'll dig into it alittle more tomorrow. Just wondering. :?

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 Post subject:
PostPosted: Wed Dec 14, 2011 6:17 pm 
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Joined: Fri Nov 01, 2002 5:29 pm
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Location: Eustis, FL
Car Model*: '68 V100, '68 V200, '79 Aspen, '84 D100
Do you mean the exhaust headpipe to manifold bolt heads or stud&nut heads are not SAE or Metric?
They should be SAE but they are prone to rusting till they are undersize, that's why your wrench or socket may not seem to fit. Usually a 12mm socket will work on a rusty 1/2" head 5/16 bolt. You may have to use a 6pt instead of a 12pt.

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 Post subject: Ugggh...
PostPosted: Wed Dec 14, 2011 6:19 pm 
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Joined: Tue Oct 29, 2002 8:27 pm
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Location: Salem, OR
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The exhaust flange is supposed to have 2 studs threaded into it.
But I've had a few that previous owner's drilled out and installed a 7/16" bolt...

The last one I used that was like that I popped for stainless bolts and nuts so they wouldn't seize if I had to take it apart again.

-D.Idiot


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 Post subject:
PostPosted: Wed Dec 14, 2011 7:14 pm 
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Supercharged
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Joined: Mon Jan 15, 2007 5:05 pm
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Location: Black Diamond, WA
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I like to drill mine and use stainless because it can be a real pain getting the nuts off if the head pipe is bent crowding the rear bolt....especially on a 2.25' head pipe...there is not much room and you can not use a socket....

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG


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 Post subject:
PostPosted: Wed Dec 14, 2011 7:16 pm 
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Turbo EFI
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Location: TEXAS
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This is not my manifold, just an example to show which bolts. I tried 6 & 12 point sockets. I tried metric and SAE standard of various sizes, they don't look to be rounded off,but they are rusty. I'll just saw them off tomorrow and find a replacement.(Stainless Steel?)
Thanks
Image

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 Post subject:
PostPosted: Wed Dec 14, 2011 7:26 pm 
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Supercharged
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Location: Black Diamond, WA
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Yes, saw them then off and drill them out. Stainless is great in this application along with the RemFlex gasket part #6006 2.25" head pipe gasket. They are real nice in this application. I used to blow out a FelPro every 6 months or so.....the manifold should have been reground flat. However a horse shoe file got the crusty stuff off and then a good flat file and the RemFlex gasket.

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Aggressive Ted



http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger





74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG


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 Post subject:
PostPosted: Thu Dec 15, 2011 1:55 pm 
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Turbo Slant 6

Joined: Fri Sep 09, 2005 9:51 am
Posts: 855
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I never have fasteners rust solid again if I use a little anti-seize grease (usually FelPro) on them. Wish the factory had done that.


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 Post subject:
PostPosted: Thu Dec 15, 2011 2:26 pm 
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Turbo EFI
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Joined: Wed Mar 25, 2009 5:56 pm
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Location: TEXAS
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the ones I was trying to remove look like rusted carriage bolts :lol:

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