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Hints for removing Grease-crete from frame cross members?
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56D500boy
Posted 2019-03-09 9:15 PM (#579095)
Subject: Hints for removing Grease-crete from frame cross members?



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I bought a transmission cross member from John at Big M (thanks John) as part of my Powerflite to Torqueflite project. Naturally it has a bit of dirt and oil on it. In some cases the fine dust and oil mixed to dry out to "Greasecrete" (tm registered)

I've been using scrapers, old screw drivers and brake cleaner and I've made some progress. I want to take it to bare metal so I can paint it all pretty like with semi-gloss rust paint. There are some bits that don't want to come off. I am tempted to use a propane torch or heat gun but don't know if I should put the fire department number on speed dial before I start that.

Any been there, done that's??

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ttotired
Posted 2019-03-10 1:27 AM (#579101 - in reply to #579095)
Subject: Re: Hints for removing Grease-crete from frame cross members?



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No short cuts

Soaking it in petrol can help, but wire brushes ect and a "needle gun" will get it off with some elbo grease

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56D500boy
Posted 2019-03-10 8:52 PM (#579138 - in reply to #579101)
Subject: Re: Hints for removing Grease-crete from frame cross members?



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ttotired - 2019-03-09 10:27 PM

.... but wire brushes etc and a "needle gun" will get it off with some elbow grease


The needle gun idea made me chase needle guns. Don't have one but then I remembered that I have a new, never-used, air chisel with a wide flat blade, some thing like this:



So I found the box in the garage and set it up to use this afternoon. That is the good news. The bad news is the temperature in my unheated garage (8 C) was too cold for the compressor to work (the oil in the crankcase is too thick).

Oh well. It's supposed to warm up this week





Edited by 56D500boy 2019-03-11 1:09 PM
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wizard
Posted 2019-03-11 2:33 AM (#579155 - in reply to #579095)
Subject: Re: Hints for removing Grease-crete from frame cross members?



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Just take care with that chisel, it will make marks and cuts.
Soak up the worst dirt with gasoline or paint thinner, cover the dirt with soaked rags and keep them moist, then you can scrape the dirt off easily.
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mikes2nd
Posted 2019-03-11 3:19 AM (#579156 - in reply to #579095)
Subject: Re: Hints for removing Grease-crete from frame cross members?


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blow torch and paint scraper to start
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60 Imp
Posted 2019-03-11 6:57 AM (#579160 - in reply to #579101)
Subject: Re: Hints for removing Grease-crete from frame cross members?


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Location: North Australia
ttotired - 2019-03-10 3:27 PM

No short cuts

Soaking it in petrol can help, but wire brushes ect and a "needle gun" will get it off with some elbo grease



I was going to suggest the same, then I remember they dont have petrol in the USA!

Soak in a tub of gasoline and it will come off no worries.

Steve.
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57burb
Posted 2019-03-11 10:58 AM (#579166 - in reply to #579160)
Subject: Re: Hints for removing Grease-crete from frame cross members?



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Get a big tub and a few gallons of Simple Green (I prefer the industrial purple version, but the green stuff works too - it's not quite as concentrated). Do NOT get Zep or other industrial / purple cleaners. They are not the same thing!

Immerse the part in a bath of Simple Green and leave it for a week. Warm temperatures make it work better. Every day give it a quick wipe with a rag in the tub until it comes out perfectly clean.

The best thing about this stuff is, it's non-toxic and water soluble. It won't irritate your hands. Part cleanup involves rinsing it off with water. And you don't have a petroleum-based mess to clean up.

If for some reason you're in a rush (or broke! ) , use oven cleaner from the dollar store. It's spray lye, so it is highly caustic, be careful. But it is cheap and fast.



Edited by 57burb 2019-03-11 10:59 AM
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Powerflite
Posted 2019-03-11 11:48 AM (#579169 - in reply to #579095)
Subject: RE: Hints for removing Grease-crete from frame cross members?



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I've always used a wire wheel on a 4.5" grinder. If that doesn't work, put an abrasive paper pad on it to smooth it out. But if you want to get inside it, it is best to media-blast it, so you might as well start with that.



(grinder.jpg)



Attachments
----------------
Attachments grinder.jpg (19KB - 5 downloads)
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56D500boy
Posted 2019-03-11 1:09 PM (#579172 - in reply to #579169)
Subject: RE: Hints for removing Grease-crete from frame cross members?



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Thanks guys. All good hints. I will use some of them (based on what I have on hand at the moment).

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56D500boy
Posted 2019-03-11 6:19 PM (#579195 - in reply to #579172)
Subject: RE: Hints for removing Grease-crete from frame cross members?



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Location: Lower Mainland BC
56D500boy - 2019-03-11 10:09 AM

Thanks guys. All good hints. I will use some of them (based on what I have on hand at the moment).
:)


Just spent 90 minutes with a 1200 Watt electric heat gun and a proper gasket scraper (that I forgot that I had) and made big-time progress. Probably just another hour to get to where I want to be.

Thanks for the hints and encouragement.

Like these:




Upwards and onwards!




Edited by 56D500boy 2019-03-11 6:20 PM
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56D500boy
Posted 2019-03-14 4:17 PM (#579322 - in reply to #579169)
Subject: RE: Hints for removing Grease-crete from frame cross members?



Expert

Posts: 4366
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Location: Lower Mainland BC
Powerflite - 2019-03-11 8:48 AM

I've always used a wire wheel on a 4.5" grinder. If that doesn't work, put an abrasive paper pad on it to smooth it out.


I used some paint remover yesterday. Not satisfied with the results I put an abrasive wheel on my angle grinder and went at it. I had to watch that I didn't try to make it too perfect.

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