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engine refurb

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Richard Acland20/01/2020 16:09:18
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71 forum posts
28 photos

Any ideas or tips for cleaning up an old OS 40. The engine is covered in burnt on castor oil and I am looking for a non invasive way to clean it up, ie no scouring or abrasives etc. Any help appreciated.

Richard

Edited By Richard Acland on 20/01/2020 16:10:55

Robin Colbourne20/01/2020 16:29:54
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469 forum posts
6 photos

Hi Richard,

I used to use oe which came in a small can with a brush in the lid. It was quite effective but left the engines looking a bit grey. I think Betterware did it.

A lot of carbon removers contain Sodium Hydroxide, so aren't safe for aluminum. This one advertises that it is ok:
Repairing Products - 'Carbon Off' carbon remover

This is the data sheet: Carbon Off Technical Data Report

Carbon-Off! Burnt on carbon remover


If you have an engine or silencer you're not too sentimentally attached to, I would try whatever you use on that first.

Andrew Ray20/01/2020 16:59:41
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743 forum posts
19 photos

Put it in an old saucepan of boiling water with a dishwasher tablet, works wonders on castor. Dry it and run it wink

SIMON CRAGG20/01/2020 17:08:51
522 forum posts
15 photos

I have tried various methods over the years, none of which were very good.

Decided to paint an engine recently (ASP .53), in "Pot Black" heat resistant car manifold paint.

Looks brilliant (different!), engine runs perfectly with no negative effects.

Job done!.

SIMON CRAGG20/01/2020 17:08:52
522 forum posts
15 photos

I have tried various methods over the years, none of which were very good.

Decided to paint an engine recently (ASP .53), in "Pot Black" heat resistant car manifold paint.

Looks brilliant (different!), engine runs perfectly with no negative effects.

Job done!.

Mike Tomlin20/01/2020 18:06:03
2 forum posts

Stove glass cleaner, the stuff for cleaning the glass on wood burning stoves. I use one called HG interior. Just done two gummed up diesel engines, use it with a soft brush and takes the old castor oil straight off.

Richard Acland23/01/2020 17:18:54
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71 forum posts
28 photos

Thanks for your replies. All helpful

ASH.23/01/2020 17:38:34
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323 forum posts

Cillit Bang (purple) works well to shift the grunge with the aid of a non-scratch scourer.

Don Fry23/01/2020 18:43:06
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4385 forum posts
52 photos

I've got a bottle of stove glass cleaner. It workson stove glass. It has potassium hydroxide in it. It would discolour a motors aluminium castings.

The last bottle, didn't work on stove glass. It had detergents in it. No hydroxide. Might clean a motor.

Boil it in low foam washing powder/liquid, whatever Beloved has. A toothbrush will then shift the gum. But, mount it and run it, as soon as it settles towards cold. No rust allowd.

Nigel R24/01/2020 08:54:16
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3395 forum posts
524 photos

You buy stove glass cleaner?

Newspaper, make wet, pick up some ash on it - removes crud from the glass almost instantly.

As per Don's post, I've used washing powder in an old saucepan before - seems to work ok.

wingcoax24/01/2020 11:04:18
65 forum posts

This topic has cropped up before, Arial washing powder seems to be the best, others turn the surface to a dark grey.

extra slim24/01/2020 11:10:04
459 forum posts
48 photos

I have used cheap washing powder but it had to be biological.. I found warm water best. Only had one go dark grey and I think it was a combination of the powder and using boiling water.. I've done many engines and exhausts with biological and it works well almost all of the time. Tend to leave them in for 30mins-1hr and then use an old tooth brush.. then rinse, and place in a warm over to dry quickly..

Chris Channon24/01/2020 14:43:45
546 forum posts

Fairy power spray. Leave on for 2 minutes, rinse and repeat, engine will look like new.

Regards

Chris.C.

Chris Channon24/01/2020 14:44:36
546 forum posts

Fairy power spray. Leave on for 2 minutes, rinse and repeat, engine will look like new.

Regards

Chris.C.

Chris Channon24/01/2020 14:46:24
546 forum posts

Oop's sorry, not sure what happened there!

Meant to say make sure the engine is dry before repeating, its an age thing !

Regards

Chris.C.

RichB24/01/2020 16:47:33
82 forum posts
1 photos

Another vote for Fairy Power spray. I've cleaned up lots of engines using this. It might need a couple of applications if the gunge is really baked on though.

Don Fry24/01/2020 19:26:08
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4385 forum posts
52 photos

Nigel R, cheers, ash and a wet green sponge sorted the stove.

I was crushed, when I reported this to a thicko friend. The withering reply, "did you not know........." did not make my day. And I messed up some aileron control rod instalions.

Onward and upward.

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