Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Classic Industries
American Auto Wire
Danchuk Catalog
Hellwig Products IncPerformance Rod & CustomNu-Relics Power Windows



Username Post: 216 exhaust manifold advice        (Topic#364426)
Doug52sedandelivery 
"2nd Year" Silver Supporting Member
Posts: 29
Doug52sedandelivery
Age: 68
Loc: Eddyville KY
Reg: 01-22-20
02-22-21 02:37 PM - Post#2814895    

As with everything else with this, someone had put a flat gasket in between the flanges of the exhaust header and the exhaust pipe instead of the gasket donut. The exhaust ate away the beveled surface where the donut seats on the manifold. The exhaust has not been removed in years and someone rather than taking off the exhaust pipe, cut it about 2 feet down from the flange to hook up a replacement exhaust system. That was leaking real bad and is why I had to take everything apart. I knew I would break the studs doing it. I plan on sending to the NAPA machine shop to see if they can clean up the seat and put in the new studs for me. I tried drilling out the broken studs but could not get them out. Probably going to need some heli-coils put in.

Do you think this will be ok? I am not sure if there is enough metal to clean up the bevel. Please give me some advice if this isn’t a good idea.

Thanks guys,

Doug

Attachment: 15757C42-75B1-4B43-8435-6BB30D1C9BBD.jpeg (101.32 KB) 3 View(s)




Attachment: 84398A49-DC90-4116-88ED-C5792B9F8724.jpeg (143.39 KB) 4 View(s)






 


2D51STYDLX 
"10th Year" Silver Supporting Member
Posts: 1166
2D51STYDLX
Loc: So. Prairie Washington
Reg: 03-03-11
02-22-21 03:09 PM - Post#2814897    
    In response to Doug52sedandelivery

Looks like mostly scale, I have saved worse with good results.

Roger
1951 2 door Deluxe Bone stock, well not quite, bucket seats.
Broken hearts and dirty windows
Make life difficult to see
Thats why last night and this morning
Always look the same to me
John Prine



Edited by 2D51STYDLX on 02-22-21 03:12 PM. Reason for edit: No reason given.

 
beagrizzly 
"12th Year" Gold Supporting Member
Posts: 2197
beagrizzly
Age: 70
Loc: south texas
Reg: 08-04-12
02-23-21 06:48 AM - Post#2814935    
    In response to Doug52sedandelivery

The biggest problem I see at this point is someone did not use brass nuts. This causes a LOT of problems later in life.

Whatever you do to repair the seat, make sure to use brass nuts when you go back. You will save yourself, or maybe the next owner a lot of frustration.

When you get the donut gasket that comes with the set, throw the fiber one away. Get a steel one. This problem will never happen again.

Actually, I would not use a gasket on the manifold either. Have it machined flat while you have it in the shop, and use Permatex Ultra Copper.
I have actually used this stuff on header flanges without them blowing out. Good stuff.

My two pennies

Griff

Attachment: rtv.jpg (19.05 KB) 5 View(s)




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


 
Doug52sedandelivery 
"2nd Year" Silver Supporting Member
Posts: 29
Doug52sedandelivery
Age: 68
Loc: Eddyville KY
Reg: 01-22-20
02-23-21 04:40 PM - Post#2814960    
    In response to 2D51STYDLX

Thanks. Just in case I will get it machined to clean up the surface



 
Doug52sedandelivery 
"2nd Year" Silver Supporting Member
Posts: 29
Doug52sedandelivery
Age: 68
Loc: Eddyville KY
Reg: 01-22-20
02-23-21 04:46 PM - Post#2814961    
    In response to beagrizzly

Griff,

Thanks for the advice. Where can I get a steel donut for the manifold?

I ordered new studs with brass nuts for the manifold.

Doug



 
jfowlerjr 
Newbie
Posts: 15

Loc: Phoenixville< PA
Reg: 05-10-10
02-24-21 10:59 AM - Post#2815011    
    In response to Doug52sedandelivery

I repaired a similar problem on an off topic car myself using MUGGY-WELD for cast iron and a hand grinder. It looked very similar to your problem and then I was able to repair the threads using a thread insert.


Jim

68 Camaro
53 Chev


 
beagrizzly 
"12th Year" Gold Supporting Member
Posts: 2197
beagrizzly
Age: 70
Loc: south texas
Reg: 08-04-12
02-24-21 11:07 AM - Post#2815013    
    In response to Doug52sedandelivery

They are still available from local mom and pop parts houses.

Forget Aotu Znoe, O'Malley's. If you can't find some, PM me, and I will give you my parts guy's phone number.

He gave me the Victor part number for the 2".
F17250S. Let me know if you can find it.

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


 
Doug52sedandelivery 
"2nd Year" Silver Supporting Member
Posts: 29
Doug52sedandelivery
Age: 68
Loc: Eddyville KY
Reg: 01-22-20
02-24-21 05:50 PM - Post#2815029    
    In response to jfowlerjr

Jim,

The machine shop can’t clean the bevel on the outlet seat so I think I will do as you say. They will do the studs for me and put in inserts if needed.

Thanks for the advice.

Doug



 
Doug52sedandelivery 
"2nd Year" Silver Supporting Member
Posts: 29
Doug52sedandelivery
Age: 68
Loc: Eddyville KY
Reg: 01-22-20
02-24-21 05:53 PM - Post#2815030    
    In response to beagrizzly

Griff,

I’ll look around on eBay. If I can’t locate them I’ll get your parts guy’s phone number. Thanks for the parts number

Doug



 


Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

314 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.122 seconds.   Total Queries: 18   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 04:04 PM
Top