![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: May 2016
Location: Pa
Posts: 1,278
|
How to restore stock exhaust manifolds? ???
What's the best way to "paint" clean up my stock manifolds? ?
I know powder won't hold and for sure who does cerakote. I'd like to keep them so I don't have issue running AC on my BBC 69 CST 396 Thanks
__________________
IT IS WHAT IT IS |
![]() |
![]() |
![]() |
#2 |
Senior Member
![]() Join Date: Dec 1999
Location: TX
Posts: 1,572
|
Re: How to restore stock exhaust manifolds? ???
![]() You can see some I had JetHot coated in this photo |
![]() |
![]() |
![]() |
#3 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
|
Re: How to restore stock exhaust manifolds? ???
Well , once off start with some serious time and effort with a stiff quality wire brush , then move up to sand blasting ,then muriatic acid bath ,fresh water flush throughly then back to sand blasting . At this point they should be like new .wash with soap and plenty of water allow to dry and then recoat with the high heat cast iron coating of your choice . Safety glasses , chemical gloves and chemical respirator required .
__________________
![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop |
![]() |
![]() |
![]() |
#4 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
|
Re: How to restore stock exhaust manifolds? ???
i'd just soak them in vinegar for a day or two they come out bright and shiny like new// no gloves required no respirator either and you can reuse the vineagar for salad dressing if you have unwanted company
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Jan 2009
Location: San Antonio, Texas
Posts: 1,374
|
Re: How to restore stock exhaust manifolds? ???
Has anyone used Calyx manifold dressing, and know how it holds up over time? When first used, it looks great. I haven't seen any "after" photos.
__________________
1972 C10 LWB, 350/350 Deconstruction began 5/2009, mostly completed restoration, 5/2017 |
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: May 2016
Location: Pa
Posts: 1,278
|
Re: How to restore stock exhaust manifolds? ???
does it just eat the rust and grease? do I need to protect the inside or gasket area in any way??
__________________
IT IS WHAT IT IS |
![]() |
![]() |
![]() |
#7 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
|
Re: How to restore stock exhaust manifolds? ???
Vinegar does not eat grease or remove rust scale . It's cast iron start scrubbing and you won't hurt them and part of the cleaning process is the inside and mounting surface start scraping . This is one item that requires elbow grease ! Or take them to a machine shop and have them do the work for you and have them hot tanked .
__________________
![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
|
Fine a good local machine shop with a bake oven and steel shot peen machine. Afterward apply a high quality brush on manifold paint and cure it in a gas grill.
__________________
1969 c-10 Step Side Long Bed. I-6 250cid = ![]() |
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: May 2016
Location: Pa
Posts: 1,278
|
Re: How to restore stock exhaust manifolds? ???
OK thanks!!!!
__________________
IT IS WHAT IT IS |
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Jul 2011
Location: strausstown pa
Posts: 3,394
|
Re: How to restore stock exhaust manifolds? ???
From what I read online you dont wanna use the acid on cast iron because it's so porous so I just wanted to be safe in that matter.
Blasting would be best. But... I used a knotted wire wheel on a drill too do most of them.then a series of smaller ones too get into the crevices. I also continued to smooth them out with grinding wheels and rolocs although this part isn't for stock resto. Then used vht paints on them...it will probably burn off anyway. That coating above is sweet.
__________________
81 camaro 355 4/spd 342 posi my first love ![]() 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover. |
![]() |
![]() |
![]() |
#11 |
Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
|
Re: How to restore stock exhaust manifolds? ???
bead blast them but be carefull of the dust generated, especially from bead blasting the inside of the exhuaste runners. the dust generated can contain toxic stuff including TEL.
|
![]() |
![]() |
![]() |
#12 |
Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
|
Re: How to restore stock exhaust manifolds? ???
Yes. Acid will absorb into the pores in the cast iron and leech out under the paint. Same goes for moisture. Which is why I recommended the baking process for complete drying followed by shot peening. Have done it that way for many customers with good results.
|
![]() |
![]() |
![]() |
Bookmarks |
|
|