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Old 03-07-2013, 07:17 PM   #1
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FL 120 water pipe replacement

As I'm replacing all my cooling hoses on my FL 120, I noticed that the 2 pipes that run along the starboard side of the engine could use replacement after 30 years. I took them to the local muffler shop. 10 minutes and $15 later I had a new set. Good deal!
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Old 03-07-2013, 07:34 PM   #2
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Originally Posted by meridian View Post
As I'm replacing all my cooling hoses on my FL 120, I noticed that the 2 pipes that run along the starboard side of the engine could use replacement after 30 years. I took them to the local muffler shop. 10 minutes and $15 later I had a new set. Good deal!
Curious. Is this freshwater or seawater service? Did you use carbon steel or stainless steel?
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Old 03-07-2013, 08:18 PM   #3
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This is the internal system filled with antifreeze. Carbon steel.
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Old 03-07-2013, 08:52 PM   #4
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Greetings,
Mr. meridian. Did you notice any deterioration in the old pipes at all or was this a "why not replace" situation?
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Old 03-07-2013, 09:16 PM   #5
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Large rust nodules on the inside, crevice corrosion where the hoses are clamped on. I believe the hoses are original. I’ll be sure to do a thorough block flush.
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Old 03-07-2013, 10:29 PM   #6
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Large rust nodules on the inside, crevice corrosion where the hoses are clamped on. I believe the hoses are original. I’ll be sure to do a thorough block flush.
I need to do that on one engine,I bought some proprietary stuff to do it, says to put it in,run engine 20 mins, cool and drain. I`m thinking a second flush with just water before replacing the coolant, about 20L/quarts on a Lehman.
Can you let us know how it goes, and the lowest point you find to drain from?
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Old 03-08-2013, 06:18 AM   #7
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"I’ll be sure to do a thorough block flush.

"
Penray - PREVENTING COOLING SYSTEM PROBLEMS


After you fill and drain be sure to use antifreeze with DISTILLED water ONLY!
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Old 03-08-2013, 08:16 AM   #8
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When I belonged to the local Model-A club, we would clean out 75 year old blocks using, among others, dissolved dish washer detergent, run it till it's hot, then flush.
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Old 03-09-2013, 07:14 AM   #9
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dissolved dish washer detergent, run it till it's hot, then flush.

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Old 03-09-2013, 09:25 AM   #10
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TSP even better. Thanks
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Old 03-10-2013, 07:31 AM   #11
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TSP is "illegal" in some places , but the gals would raise He** if some politico messed with the dishwasher !

So TSP is in most dish washing soaps , so easy to find in "prohibited" areas.
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