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Old 02-16-2009, 01:36 AM   #1
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Default cleaning pipes in engine coolant???

I have read on here that some of you clean your pipes by putting them in a slow cooker with engine coolant.

How long does this take?

I've had my pipes in the slow ccoker on high for 18 hours now and they still looks the same
the coolant is still like new and the pipes are still caked with crap

what am i doing wrong?
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Old 02-16-2009, 02:14 AM   #2
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Default oven cleaner

take all the rubber seals off spary with oven cleaner turn oven on and 20-30 mins later like new
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Old 02-16-2009, 02:51 AM   #3
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+ 1 on oven cleaner, I tried it not knowing if it would work on a JP-3 I got from ebay, this thing was nasty, couldn't tell what it was. Came out like new!
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Old 02-16-2009, 04:52 AM   #4
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What temp you cooking it at/
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Old 02-16-2009, 05:10 AM   #5
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Quote:
Originally Posted by malik View Post
What temp you cooking it at/
He said on High.

I'm curious what's up here. I am starting to look around for a used or cheap cooker to get ready for the upcoming season.

TIX - did you use a bottle of premixed coolant that has water mixed in 50/50 already or use full strength coolant? I was reading in the other posts last year that everyone seems to use the full strength. That is all I can guess for you since I haven't done this yet myself. I remember reading that it only takes like 8 hours on High. Buildup inside and dirt outside should just fall right off or require just a light brushing. Hope you figure it out
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Old 02-16-2009, 05:12 AM   #6
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baking takes alot of time, use oven cleaner
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Old 02-16-2009, 05:12 AM   #7
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I tried it once with the pre-mixed 50/50 antifreeze and it didn't work. I need to try it with full strength but I wonder if oven cleaner would work as well. Full strength antifreeze is a bit expensive since you can only get it in gallon size.
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Old 02-16-2009, 08:43 AM   #8
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I used 100% green antifreeze and pulled the manifolds off the pipes and removed the gaskets. Put them in the crock pot on high, with the lid on. Left them all day. They came out clean and the antifreeze was filthy. I had a big pot so I did like 6 pipes at once. There were a few really dirty spots that I had to simply rub off the loosened remaining residue with a rag. It probably would have cleaned that off if I left them in longer.

No harm to the pipes, coating, etc. It does take awhile, but if you have a day or so of maintenance to do anyway, then whats the hurry?
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Old 02-16-2009, 08:46 AM   #9
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Anti-freeze does make sense due to it's properties in an auto engine. It's definitely aluminum safe and does have some cleaning properties. I'll have to give this a try some day.
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Old 02-16-2009, 08:48 AM   #10
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50/50 mix can turn polished pipes black. Use the full strength stuff. If it's really caked on you may have to scrub just a bit with a toothbrush.
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Old 02-16-2009, 09:20 AM   #11
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I use the crock pot method and it works wonderful. 100% coolant and pot on high with lid on for 6-8 hours. Coolant was black and pipes were like new.
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Old 02-16-2009, 09:31 AM   #12
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This anti-freeze method.....does it remove the EFRA numbers on the pipes?
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Old 02-16-2009, 09:31 AM   #13
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Make sure you use a "green" coolant that not pre-mixed. The "green" type coolants have phosphorus, thats what cleans the pipes. Anything else probably won't work. I tried soaking pipes with dish washing power & hot water and got them semi-cleaned. Good enough, but could be better. (FYI- some dish washing power still has phosphates, but is being taken out). If you lve outside the US, some of those dish powders still have higher phosphates.
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Old 02-16-2009, 09:43 AM   #14
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for a non coated pipe try a fine steel wool pad...works wonders
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Old 02-16-2009, 09:46 AM   #15
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Quote:
Originally Posted by Charles Godwin View Post
This anti-freeze method.....does it remove the EFRA numbers on the pipes?
Nope.

I tried the steel wool and it was not even close to the results I got baking in the crock pot. You also want to get the inside of the pipe clean.
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