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Username Post: Correct 64 exhaust nuts        (Topic#352412)
Fossil_Fuel 
"6th Year" Silver Supporting Member
Posts: 1042
Fossil_Fuel
Age: 59
Loc: Minnesota
Reg: 09-11-07
08-09-18 02:27 PM - Post#2742525    

Does anyone know which nuts are correct for the exhaust manifold studs. I see some brass and some “locking” type nuts. I blew a donut and when I removed my nuts the RH are locking type and the other side are more standard nuts.

Also there were short (about 2” long)t pipe pieces inside the exhaust pipes. I think they are called down pipe tube extensions. Are these original also?

327/300 engine

Verne??



Craig
1964 Impala SS 327/300 since '76
1967 Impala SS 327 Triple Black Hardtop in the works
1967 Impala 327 Bench Seat 4-speed
http://craigaacars.shutterfly.com/pictures


 




Mercedes 
Contributor
Posts: 189

Reg: 07-09-18
08-10-18 05:14 AM - Post#2742567    
    In response to Fossil_Fuel

Years ago I had a 64 and the exhaust shop did put the extra sleeve in the front pipe to keep the gaskets from burning up. That's what they told me.

As far as the exhaust manifold nuts, I've seen it a number of ways. I believe that a nut that has a built in shoulder and serrated edge to bite into the cast iron on the manifold is the correct nut.



Edited by Mercedes on 08-10-18 05:15 AM. Reason for edit: No reason given.

 
Verne_Frantz 
61-64 Subject Matter Expert
Posts: 5485
Verne_Frantz
Loc: Hightstown,NJ USA
Reg: 08-22-00
08-10-18 06:13 AM - Post#2742574    
    In response to Fossil_Fuel

These were the original exhaust manifold nuts used.
Verne.



Attachment: ExhaustMan.StudNut.1.JPG (381.76 KB) 7 View(s)






 
YOUNG57 
Frequent Contributor
Posts: 1074

Loc: Tennessee
Reg: 12-06-10
08-10-18 06:29 AM - Post#2742580    
    In response to Fossil_Fuel

If you blew an exhaust donut why not replace it with a cast iron one. Cast iron ones do not blow or burn out, they last forever unless you drop and break it.



 
Fossil_Fuel 
"6th Year" Silver Supporting Member
Posts: 1042
Fossil_Fuel
Age: 59
Loc: Minnesota
Reg: 09-11-07
08-10-18 08:03 PM - Post#2742670    
    In response to Verne_Frantz

Thanks Verne
I think I have the correct ones then.


Attachment: A6328166-60B1-401F-BA14-2943C0948839.jpeg (1.5 MB) 7 View(s)




Craig
1964 Impala SS 327/300 since '76
1967 Impala SS 327 Triple Black Hardtop in the works
1967 Impala 327 Bench Seat 4-speed
http://craigaacars.shutterfly.com/pictures


 
DougMN 
Senior Member
Posts: 228
DougMN
Loc: stillwater,mn
Reg: 10-17-02
08-12-18 03:29 PM - Post#2742878    
    In response to Verne_Frantz

Where do you get the cast iron donuts and what did they originally fit, thanks.

DougMN


Edited by DougMN on 08-12-18 03:30 PM. Reason for edit: No reason given.

 
Verne_Frantz 
61-64 Subject Matter Expert
Posts: 5485
Verne_Frantz
Loc: Hightstown,NJ USA
Reg: 08-22-00
08-12-18 07:12 PM - Post#2742891    
    In response to DougMN

They wern't cast iron; they were a steel sleeve wrapped over an asbestos core. They were found at various auto parts suppliers. I'd suggest an old NAPA dealer. I mean a dealer in a small town that's been there forever.

Verne



 
Fossil_Fuel 
"6th Year" Silver Supporting Member
Posts: 1042
Fossil_Fuel
Age: 59
Loc: Minnesota
Reg: 09-11-07
08-12-18 09:09 PM - Post#2742897    
    In response to Verne_Frantz

These are the sleeves that were inside my exhaust pipes. Has anyone else seen these?


Attachment: B40676BB-3DCB-4438-9DF0-4B929988411D.jpeg (2.04 MB) 5 View(s)




Craig
1964 Impala SS 327/300 since '76
1967 Impala SS 327 Triple Black Hardtop in the works
1967 Impala 327 Bench Seat 4-speed
http://craigaacars.shutterfly.com/pictures


 
Andy4639 
Frequent Contributor
Posts: 1211

Age: 58
Loc: Liberty, SC
Reg: 08-06-16
08-13-18 03:20 AM - Post#2742908    
    In response to Fossil_Fuel

I have set off my 67 c 20. The ram horns are basic the same for these vehicles.


1956 Bel Air - LT-1/4l60
1964 SS Impala -350 crate/powerglide
1967 Ramp truck - 350/ 4 speed
1971 C 10 - 6.0 LS / 4l80e 4:10 gears 30 years owner
94 Elderado
2000 S-10
2008 LTZ Tahoe
2011 Treverse


 
junky 
Valued Contributor
Posts: 2745

Loc: Northeast CT
Reg: 06-27-10
08-13-18 04:05 AM - Post#2742914    
    In response to Fossil_Fuel

Those sleeves look like they were cut from a length of steel tubing. I have some original sleeves that GM sold for the Corvair for the same purpose. Later production pipes had the sleeves already installed in the pipes, and those sleeves were not removable. GM probably did the same for the full size cars also, but when was the last time that anyone has seen a NOS pipe, to know for certain?


Never argue with an idiot. He'll drag you down to his level, then beat you with experience.


 
turbo38s10 
"7th Year" Gold Supporting Member
Posts: 1598
turbo38s10
Loc: Agawam,MA
Reg: 09-17-09
08-13-18 05:48 AM - Post#2742918    
    In response to Fossil_Fuel

yes I have a set myself. One end goes in the pipe and the gasket goes on the other. There used to be a big problem burning out those gaskets and I think they made them to help with that. I forget where I got them but they are available through NAPA or maybe Rock Auto.



 
turbo38s10 
"7th Year" Gold Supporting Member
Posts: 1598
turbo38s10
Loc: Agawam,MA
Reg: 09-17-09
08-13-18 06:50 AM - Post#2742923    
    In response to Fossil_Fuel

Here is a picture of what I have. The gaskets are Sintered metal and the sleeves are stainless for 2 1/2" manifolds. I believe the part number for the gaskets is Felpro 60986 not sure on the sleeves.

Here is one with the graphite gasket and sleeve.
https://www.summitracing.com/parts/aph-9091?seid=s ...



Attachment: gaskets.jpg (1.37 MB) 5 View(s)






Edited by turbo38s10 on 08-13-18 06:59 AM. Reason for edit: No reason given.

 
beagrizzly 
"10th Year" Gold Supporting Member
Posts: 1926
beagrizzly
Age: 68
Loc: south texas
Reg: 08-04-12
08-15-18 07:27 AM - Post#2743125    
    In response to turbo38s10

I have always thought the sleeves were to align the donut. It's really hard to get the donut centered, and square in the flange. This always created a leak for me, which led to a burned out donut.

With the pipe inside, it lines up perfectly.

Griff

if you're gonna be a bear..................

1960 Biscayne (the 6T)
2005 Yukon XL
2007 GMC Sierra Classic 8.1
2009 Silverado
2011 Escalade ESV


 
Mercedes 
Contributor
Posts: 189

Reg: 07-09-18
08-15-18 03:04 PM - Post#2743180    
    In response to beagrizzly

The reason that the exhaust shop installed the sleeves for me many years ago is because the exhaust nuts kept coming loose.

They made them from pipe and expanded one end, I think. They were a tad longer than the kit shown.

I was told that the sleeve would protect the donut from burning out.



 




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