Exhaust manifold rejuvenation

[Chuck Sea/Tac]

I have the heater exhaust manifold, that I'm getting an ear repaired,and I would like to clean up the rust, and paint it with por15 manifold paint.
What's a good recommendation for the rust removal prep work.?

[Licensed to kill]

sand blasting. I just blasted mine today and painted them (intake and exhaust) and the clamp and bolts with POR manifold paint.

[SeaSlugs]

yup - cast iron has a crapton of pores that wire brushing will never get clean. Bring a bunch of stuff to the blaster to make it worth while.

[BILL WILLIAMSON]

Has anyone used CAST-BLAST paint? Vermins' has been "curing" for 3 years, I "think" it'll be OK!
Read of a Guy that SUPER HEATED his manifold, afterward, it showed LUMPS of LEAD or SOLDER like stuff all over it!!! "Wonder" what caused that?????
Bill W.

[Licensed to kill]

The POR manifold paint has to be cured in the oven. 400 degrees for 4 hours. It's dry to the touch in a few minutes but will not perform properly unless oven cured.

[Big hammer]

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Will sandblasting get all the rust out of the pores? Evaporust! Have the manifolds or check for flatness! before any work.

[Licensed to kill]

Yes sandblasting will get all the rust out of the pores. Electrolysis would work well also

[Terry, NJ]

Sounds Great! However, what about the "Droop" or bend that manifolds acquire over time?This is where the manifold loses it's alignment with the last port and blows gaskets out. I think its usually at # 1 cylinder.
Terry

[BILL WILLIAMSON]

Originally Posted by Terry, NJ

Sounds Great! However, what about the "Droop" or bend that manifolds acquire over time?This is where the manifold loses it's alignment with the last port and blows gaskets out. I think its usually at # 1 cylinder.
Terry

Terry,
CRUSH a Viagra, mix it with water, brush it on the manifold, it "MAY" help
Bill Usedtobedrooped

[Licensed to kill]

Originally Posted by BILL WILLIAMSON

Terry,
CRUSH a Viagra, mix it with water, brush it on the manifold, it "MAY" help
Bill Usedtobedrooped

Well....these cars (and their parts) ARE old!.

[1crosscut]

Bill - I use Cast Blast and like it.
First time I used it I cured it in the oven. Stunk the house up REALLY BAD!
Very thankful my wife was out of town for a few days on a business trip. Won't do that again.
Now I cure it by by evenly playing a torch over it until it gets good and hot.

[Licensed to kill]

Originally Posted by 1crosscut

Bill - I use Cast Blast and like it.
First time I used it I cured it in the oven. Stunk the house up REALLY BAD!
Very thankful my wife was out of town for a few days on a business trip. Won't do that again.
Now I cure it by by evenly playing a torch over it until it gets good and hot.

Hmmmmm, just reading this and truing to figure out how it relates to Bill's suggestion of Viagra. Don't think I really want to know.

[1crosscut]

Originally Posted by Licensed to kill

Hmmmmm, just reading this and truing to figure out how it relates to Bill's suggestion of Viagra. Don't think I really want to know.

Post number 4

[Licensed to kill]

Originally Posted by 1crosscut

Post number 4

This is why the "quote" feature is your friend so it's clear what post you are replying to.

[jeep44]

Originally Posted by Terry, NJ

Sounds Great! However, what about the "Droop" or bend that manifolds acquire over time?This is where the manifold loses it's alignment with the last port and blows gaskets out. I think its usually at # 1 cylinder.
Terry

Heater manifolds are much less likely to "droop" than stock, non-heater manifolds. All the heater manifolds I have are straight as an arrow across all the exhaust ports.