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07-30-2014, 06:02 PM
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#1 |
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Registered User
Join Date: May 2013
Location: California
Posts: 65
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Phosphoric acid bad for cast iron exhaust manifolds?
Looking to refinish my ram horns, have read conflicting information about using Phosphoric acid on cast iron exhaust manifolds. Just looking to prep the surface for a simple high-temp rattle can refinish. Would a simple engine degreaser suffice?
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07-30-2014, 06:18 PM
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#2 |
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Registered User
Join Date: Feb 2013
Location: central California
Posts: 2,759
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Re: Phosphoric acid bad for cast iron exhaust manifolds?
Degreaser may likely leave a residue which paint won't like. What about just a good ol fashioned pressure washing at the coin op? Or both...degreaser first then blast 'em up clean and let them dry.
Last edited by AcampoDave; 07-30-2014 at 06:24 PM. |
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07-30-2014, 06:23 PM
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#3 | |
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Registered User
Join Date: May 2013
Location: California
Posts: 65
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Re: Phosphoric acid bad for cast iron exhaust manifolds?
Quote:
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07-30-2014, 08:38 PM
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#4 | |
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Senior Member
 
Join Date: Aug 2013
Location: corktown,mi.
Posts: 5,194
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Re: Phosphoric acid bad for cast iron exhaust manifolds?
Quote:
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07-30-2014, 08:37 PM
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#5 |
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Moderator
 Join Date: Dec 2012
Location: ON, Canada
Posts: 2,169
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Re: Phosphoric acid bad for cast iron exhaust manifolds?
Drop them in a bucket of vinegar for a couple of days. Rinse, dry immediately. They will look brand new. You can buy bulk vinegar at Costco.
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