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> 3.2 Engine fire! How to clean.
Mate914@gmail.com
post Jul 15 2023, 05:13 PM
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I just had an engine fire. Car was warm pulled out and saw flames out the rear view mirror. My Element did not work. Next one did but did not stop fire. 40 year old fire extinguisher did the job!
What is the best solution for removing the extinguisher residue from the PMO carburetors and the engine? Could have been much worst! Saved the car!

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Mate914@gmail.com
post Jul 15 2023, 05:17 PM
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Mate914@gmail.com
post Jul 15 2023, 05:19 PM
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mb911
post Jul 15 2023, 05:22 PM
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Wash right away. Make sure nothing goes down the carb throat and if by mistake it does vacuum that out right away. I would be using dish soap myself
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BeatNavy
post Jul 15 2023, 05:24 PM
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That sucks, Matt. No help here other than I hope you get it sorted out without major problems.
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JeffBowlsby
post Jul 15 2023, 05:28 PM
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What’s the chemistry of the fire extinguisher used? I thought a standard FE left an acidic residue? Find out and use the correct cleaner and fast!
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Mate914@gmail.com
post Jul 15 2023, 05:30 PM
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QUOTE(JeffBowlsby @ Jul 15 2023, 06:28 PM) *

What’s the chemistry of the fire extinguisher used? I thought a standard FE left an acidic residue? Find out and use the correct cleaner and fast!

I have very limited service here and cannot research it. I have to use multiple hotspots to get these messages out. I used an element extinguisher and I also use a standard camper extinguisher about 40 years old, not sure it’s composition.

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Mate914@gmail.com
post Jul 15 2023, 05:31 PM
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Going for dishwasher, soap and water rinse now. Wish me luck.
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nditiz1
post Jul 15 2023, 05:38 PM
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Don't know the best method, glad it was saved, unhappy to hear 1 element didn't do the job. I am running them in my cars.
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mepstein
post Jul 15 2023, 05:56 PM
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Drop the engine and trans and start cleaning. Without knowing the right thing to do, I would probably use dawn dish soap and water with baking soda mixed in. I would probably take the engine down to a long block and clean each piece individually and get under the fiberglass shroud. Then wipe everything down with wd40 to give all the exposed aluminum and steel some protection.
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Mate914@gmail.com
post Jul 15 2023, 06:20 PM
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QUOTE(mepstein @ Jul 15 2023, 06:56 PM) *

Drop the engine and trans and start cleaning. Without knowing the right thing to do, I would probably use dawn dish soap and water with baking soda mixed in. I would probably take the engine down to a long block and clean each piece individually and get under the fiberglass shroud. Then wipe everything down with wd40 to give all the exposed aluminum and steel some protection.

Thank you.
Matt
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bkrantz
post Jul 15 2023, 08:11 PM
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From the Guardian Fire service web site:

Dry chemical fire extinguishers use firefighting agents such as monoammonium phosphate, sodium bicarbonate, and potassium bicarbonate. These leave behind a corrosive powder, so it’s important to clean up dry chemical fire extinguisher residue quickly, especially if it has come in contact with metal surfaces.

Vacuum or sweep up loose debris.
Spray stuck-on residue with isopropyl alcohol diluted 50 percent with warm water. Let the solution sit for several minutes, and then wipe with a damp rag.
To neutralize sodium bicarbonate and potassium bicarbonate residue, apply a solution of 98 percent hot water and 2 percent vinegar. After several minutes, wipe the area with a damp rag.
To neutralize monoammonium phosphate residue, apply a baking soda and hot water paste. After several minutes, wipe the area with a damp rag.
Give the affected area a final wash with soap and water, and then rinse clean. Use fans to help the spot dry quickly.

That matches my memory that dry chem stuff is chemically basic, and corrosive--and needs to be neutralized with a mild acid.
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Mate914@gmail.com
post Jul 15 2023, 08:33 PM
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I rinsed good today..
Tow home then strip down.
Thanks for you help guys.
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Ottomotion
post Jul 15 2023, 10:35 PM
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What was the root cause? Line, fitting...?
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r_towle
post Jul 15 2023, 10:39 PM
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That sucks!
I would follow the sage advice here based upon experience.
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Shivers
post Jul 16 2023, 08:21 AM
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So sorry.
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ConeDodger
post Jul 16 2023, 08:41 AM
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QUOTE(Ottomotion @ Jul 16 2023, 01:35 AM) *

What was the root cause? Line, fitting...?


As soon as I read the thread title, I said “carbs.” In its original form, the 3.2 doesn’t mix fuel and air with an ignition source until the combustion chamber.

Got to be a leaky line and an errant spark.
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mate914
post Jul 16 2023, 02:05 PM
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I got the car cleaned off as best as I could at the location I was in. I just got back with the car on the trailer and took a few photos. I am now going to do the baking soda and vinegar wash downs. I will be dropping the engine tomorrow morning. I think the fire started inside the air cleaner assembly.

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mate914
post Jul 16 2023, 02:06 PM
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mate914
post Jul 16 2023, 02:09 PM
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