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Old 06-06-12, 11:58 PM   #1
engine junkie
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Default Penetrating oils/release agents

Now as you all know there are many penetrating oils on the market and probably the most famous is wd40.
Well there is one I strongly recommend to to you guys.
I use one called SAS and get on very well with it have done some experimenting with some sprayed on bare steel left outside for six months following a quick wipe no rust was apparent . But the best was on my Briggs and Stratton z type which was seized through a long stand up she was solid so I filled the bore up and left it for a few months . Whilst pottering at the weekend put the crank handle in and literally gave the handle a gentle thump with the palm of my hand and away it went. Turned it over gently no tight spots are apparent so the rebuild will be made a whole lot easier now.
Now i know i could have used diesel or another brand and it may well have worked but on a daily basis I have found it to be far superior than wd or plus gas etc and at 20.00 ish for 4 litres is a decent price for a product you are not paying for the name on the tin.
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Old 07-06-12, 12:28 AM   #2
derek_patterson
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Thanks for the tip Engine Junkie, sure beats having to trim a block of wood to fit the bore and then sledge a piston out.

Although in saying that I left diesel in the bores of my E27N for over a year and nothing even seeped through. That was a job for the big persuader and although the bores weren't actually too bad as it turned out, it was the white metal bearings falling out in my hand which presented the biggest problem

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Old 07-06-12, 01:12 AM   #3
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Been there done that with an international TD 18 crawler and no amount of gentle persuasion would shift all six pistons but a good fitting block of wood and a 10 lb hammer did . It dont win em all but its really is good stuff and I personally swear by it.
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Old 07-06-12, 02:41 AM   #4
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Phew, at least I only had to do four cylinders. Hopefully it will be a long time before I have to tackle anything as bad because even the diff was so badly rusted the wheels wouldnt turn.

Derek
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Old 07-06-12, 09:20 AM   #5
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Quote:
Originally Posted by derek_patterson View Post
Thanks for the tip Engine Junkie, sure beats having to trim a block of wood to fit the bore and then sledge a piston out.

Although in saying that I left diesel in the bores of my E27N for over a year and nothing even seeped through. That was a job for the big persuader and although the bores weren't actually too bad as it turned out, it was the white metal bearings falling out in my hand which presented the biggest problem

Derek
Now if only someone would invent spray on white metal bearings.--anyone?
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Old 07-06-12, 12:02 PM   #6
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We use SAS spray at work , and have to say it is bloody fantastic stuff, it's freed off the most stubborn of nuts in the past and is brilliant at corrosion protection..Cheap too
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Old 07-06-12, 12:55 PM   #7
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Quote:
Originally Posted by engine junkie View Post
Now as you all know there are many penetrating oils on the market and probably the most famous is wd40.
Actually, WD40 isn't (wasn't!) a penetrating oil. It was developed and produced as a Water Dispersant for aircraft. All of the 2000+ claimed other uses for it have all come from customers, and are really all about the main ingredients, which are "secret". In all probability the main constituent is paraffin, which carries the wax/silicon/whatever water dispersant. All of the claimed uses are based on either the penetrant qualities of the paraffin or the lubrication qualities of the dispersant.

WD40 is always out-performed by a proper penetrating oil (most of which are based on paraffin!). Plus-gas may be the best known, but I have also heard good things about the SAS product. Interestingly, WD40 also produce a penetrating oil in the "specialist range"...

You can make a workable penetrating oil by mixing cellulose thinners with ATF. The key ingredients of any penetrating oil is a penetrant that gets into any gap, no matter how small, and then evaporates to leave behind a lubricant.

Martin.
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Old 07-06-12, 01:09 PM   #8
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Sounds good i'll give that a go, thanks martin
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Old 07-06-12, 07:57 PM   #9
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This may be of interest-
http://www.yotatech.com/f123/penetra...arison-193496/
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Old 07-06-12, 09:28 PM   #10
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Anyone remember a penetrating oil called 'Ease-it' or something like that. From distant memory I seem to remember it was dark in colour and smelled a bit like Germoline. Seemed to work OK when I was working on rusty old Mini cars!
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