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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: 76chevy on March 29, 2006, 01:37:00 pm

Title: rusty exhaust manafolds
Post by: 76chevy on March 29, 2006, 01:37:00 pm

i just got a remanufactured 350 for my 1976 chevy. i sand blasted all of my old parts and re painted them. what can i do to my rusty exhaust manafolds?

Title: > rusty exhaust manafolds
Post by: Lt.Del on March 29, 2006, 02:09:00 pm

You can reuse your exhaust manifold as well as long as it isn't warped or cracked.  There is a special paint you can paint them...Eastwood and other retailers sell the stuff...a grayish color made to withstand the high temps.

SgtDel

GMU '90
Mason Final Four....Who is Florida???

Title: Re: > rusty exhaust manafolds
Post by: cruppert77 on March 29, 2006, 04:26:00 pm

Make sure they fit before you paint them. Most of the time they warp and wont line up with the bolt holes

Title: Re: > rusty exhaust manafolds
Post by: 123 pugsy on March 29, 2006, 05:14:00 pm

Sandblast them first of course and they'll look like new.

Title: Re: > rusty exhaust manafolds
Post by: Blazin on March 29, 2006, 09:53:00 pm

Pick and buy your product before you blast them. There are some products out there that are designed to go over non scaly rust. They do not perform well on clean metal.

Title: Re: > rusty exhaust manafolds
Post by: Ziptar on March 30, 2006, 05:52:00 am

Por15 makes a "Manifold Restoration Kit"

1979 Silverado C10 w/ Olds 5.7 Diesel

85 C10 Custom Deluxe

Title: Re: > rusty exhaust manafolds
Post by: Blazin on March 09, 2007, 10:21:00 pm

I know this is an old post. I was boared and skiming through the old ones. I used PORs manifold paint on my 79 K30 dump about six weeks ago and they still look good. Even with the salt etc. on our roads. I needle scaled them to knock all the scale rust off and painted it on. No sandblasting. PS I had a heck of a time getting the right side back on as it got about a 1/32 of an inch shorter while off the truck overnight!

Title: Tools
Post by: VileZambonie on March 10, 2007, 08:26:00 am

every mechanic should have a few manifold spreaders!



The best way of removing the rust is usually chemically...
This technique works

www3.telus.net/public/aschoepp/electrolyticrust.html

Edited by: VileZambonie  at: 3/10/07 8:27 am

Title: Re: Tools
Post by: Blazin on March 14, 2007, 08:45:00 am

Yeah but I didn't have one availible and it sucked!

Title: Re: Tools
Post by: Lt.Del on March 14, 2007, 10:37:00 am

throw that puppy in your oven and bake at 250 for about 20 minutes.  she should expand pretty darn well.  

SgtDel
aka "Andy"

www.delbridge.net

1979 Big 10 383 stroker
1991 Blu 'Burb 3/4 ton 4x4