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Post by pigboy on Mar 13, 2021 18:01:41 GMT 1
Can anyone recommend a way or product to clean the piston and ring grooves ?
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Post by stusco on Mar 13, 2021 18:09:08 GMT 1
Not tried it but ive heard a dishwasher makes a good job
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Post by panzermatt on Mar 13, 2021 20:16:02 GMT 1
elbow grease, and an old piston ring.
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Post by JonW on Mar 14, 2021 1:28:26 GMT 1
+1
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Post by Tobyjugs on Mar 14, 2021 1:31:07 GMT 1
A good way to remove carbon is to soak it in water for a day. Not sure about on a 2 stroke because of the oil.
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Post by marrcel on Mar 14, 2021 8:12:32 GMT 1
Dasty
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Post by chrisg on Mar 14, 2021 11:40:22 GMT 1
Not tried it but ive heard a dishwasher makes a good job No to dishwasher, unless her names Julie.😂 I've used a car product for cleaning EGR valves that works. Other than that, de greaser and solvol. |
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Post by stusco on Mar 14, 2021 11:43:55 GMT 1
My mate has an old dishwasher in his garage he uses it to degrease/clean the pistons and other parts from his 7 motorcross bikes I don’t know what detergent he uses though
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Post by chrisg on Mar 14, 2021 12:13:56 GMT 1
I cleaned some carbs in a dishwasher years ago and found that the top surface was badly tarnished. Nearly scrap. 😒
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avb
Thrash Merchant
andys vapour blasting
Posts: 385
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Post by avb on Mar 14, 2021 13:29:27 GMT 1
ive had great results vapour blasting pistons  |
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Post by 4l04ever on Mar 15, 2021 9:28:03 GMT 1
Maybe soda blasting?
You have to be careful with abrasives, as you don't want any material taken off as this is one of the critical parts in your engine.
If you decide to blast the pistons, you would need to get them measured to make sure they are still in tolerance, and/or check bore to piston clearance when refitting.
The same would apply if you used wet and dry to clean them up.
Try brake cleaner or other chemical methods first.
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Post by arrow on Mar 15, 2021 11:46:17 GMT 1
I would think that paint stripper would work well for removing carbon from pistons.
Any thoughts?
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Post by julianboolean on Mar 15, 2021 11:54:59 GMT 1
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Post by steve63 on Mar 15, 2021 14:01:08 GMT 1
I've often thought there must be something out there that either dissolves or otherwise removes carbon but wont effect the aluminium. It would be nice to just drop them in something and pull them out 24/48 hours later and the carbon is gone.
I never considered trying water.
I've had RGV250 powervalves soaking in carb and choke cleaner for weeks and it didn't touch the carbon or hardly at all.
Was thinking about trying soda or walnut shell in the blaster but not got around to it. It's like powder but I wouldn't use the glass bead that's in the blaster now to do a piston or PV's even though I doubt the amount of material removed would be measurable.
I really should get some walnut shell and try it on a scrap piston.
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Post by Tobyjugs on Mar 15, 2021 14:24:29 GMT 1
Maybe soda blasting? You have to be careful with abrasives, as you don't want any material taken off as this is one of the critical parts in your engine. If you decide to blast the pistons, you would need to get them measured to make sure they are still in tolerance, and/or check bore to piston clearance when refitting. The same would apply if you used wet and dry to clean them up. Try brake cleaner or other chemical methods first. The tolerances of the two engine cases are more critical than the outside of a piston. Everybody loves to blast their engine cases. |
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Post by midlifecrisisrd on Mar 15, 2021 15:45:59 GMT 1
DCM should strip carbon off
I'll have to give it a try
Also remember my dad using Amonia to clean the glass door on the Rayburn coal fire
Steve
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Post by Gitram on Mar 15, 2021 16:46:53 GMT 1
Vinegar might do it, less smelly than ammonia..
marti
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Post by reedpete on Mar 15, 2021 21:11:14 GMT 1
Best to use something that doesn’t react with the aluminium as well, so ammonia, acid, strong alkali such as caustic soda are all no good.
Scraping the ring groove is the time old solution. Piece of old ring is the usual scraper tool..
As for piston, a plastic scraper on the crown and elbow grease....
TBH, if the pistons are really varnished up and thick deposits on the crown, then piston and bore are going to be quite tired.
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Post by steve63 on Mar 16, 2021 13:33:54 GMT 1
DCM should strip carbon off I'll have to give it a try Also remember my dad using Amonia to clean the glass door on the Rayburn coal fire Steve This will be something quite obvious I'm sure but what is DCM please? |
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Post by reedpete on Mar 16, 2021 13:44:24 GMT 1
DiChloroMethane
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Post by midlifecrisisrd on Mar 16, 2021 14:33:36 GMT 1
DCM should strip carbon off I'll have to give it a try Also remember my dad using Amonia to clean the glass door on the Rayburn coal fire Steve This will be something quite obvious I'm sure but what is DCM please? Also known as Methylene Chloride It's what they don't put in paint stripper anymore but you can buy it quite cheaply from sellers on ebay I use it for removing paint from fasteners etc before zinc plating It's toxic and canceregenic so goggles and gloves please Steve |
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Post by steve63 on Mar 16, 2021 18:12:34 GMT 1
This will be something quite obvious I'm sure but what is DCM please? Also known as Methylene Chloride It's what they don't put in paint stripper anymore but you can buy it quite cheaply from sellers on ebay I use it for removing paint from fasteners etc before zinc plating It's toxic and canceregenic so goggles and gloves please Steve Mmmm. I have some Paramose paint stripper that contains Methylene Chloride. We were given it by a painting contractor when they painted part of a job they shouldn't have done. Our guys refused to use it after reading the label, stashed it and spent a week sanding it off instead. I liberated it for the garage before anyone else did the same. It actually removed powder coating reasonably well which surprised me as original Nitromors didn't do very well if I remember rightly. |
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Post by midlifecrisisrd on Mar 16, 2021 18:57:43 GMT 1
My guide is always the more dangerous the labels make it out to be the better it works and the more I want it 😁
Steve
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Post by marrcel on Mar 16, 2021 19:31:49 GMT 1
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Post by jon on Mar 16, 2021 19:50:00 GMT 1
I would think that paint stripper would work well for removing carbon from pistons. Any thoughts? From memory it does. I seem to remember paint striping a YPVS head and got it covered all over. Domes came up nice with no scraping. Jon |
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Post by midlifecrisisrd on Mar 16, 2021 19:52:54 GMT 1
Tried it today and although DCM didn't take the carbon off (only left it 5 mins) it removed all the oil from it and the carbon left was quite powdery
Steve
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Post by 525bri on Mar 20, 2021 9:05:48 GMT 1
I've not used it but maybe one of the oven cleaner products would do it? Works a treat when the other half does aluminium and stainless pans.
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Post by speedar on Mar 20, 2021 9:27:03 GMT 1
Dremmel with brass brush attachments when cleaning powervalves then polish with solvol. Come up nice and shiny sure it would work for pistons and grooves.
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Post by abar121 on Mar 20, 2021 15:15:07 GMT 1
I've tried soda blasting at home, to remove carbon build ups on heads etc.
It's delicate enough and works well.
But the mess is unbelievable! It looked like it was snowing in my back yard.
Like sandblasting but with a lot more slag!
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Post by bare on Mar 22, 2021 16:35:01 GMT 1
I would think that paint stripper would work well for removing carbon from pistons. Any thoughts? Stripper works Beautifully. Amazingly good actually, as the Carbon just washes off, leaving a factory fresh finish. Do need be clever enough to use caution, as leaving it on for too long can eventually damage the surfaces. |
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