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nickalex
nickalex

Posted: Fri Aug 07, 2009 12:34pm

Post Subject: engine oil additive

One for Mr.Brooks... I have been trying to get hold of some Morris Ambesta Glaze Buster oil additive but have found out it is no longer made thanks to the EU. I was wondering if Tony knows of a (reputable) equivalent I could use to help my smoky engine. Thanks for your help. nick

Tony-B
Tony-B

Posted: Fri Aug 07, 2009 8:48pm

Post Subject: engine oil additive

Dear Nick, unfortunately I know of no other product that has been user tested with acceptable results but much depends upon what is causing the smoke and how much oil is being burnt. If you are not burning oil then the problem is likely to be with the compression or fuel atomisation. The latter is cheaper to fix because the injectors will require overhauling by a specialist. Even if you are burning oil Amblita only ever sought to solve bore glazing problems so if you have worn oil control rings or leaking valve stem oil seals it would have had no effect. Please be clearer about what you are trying to cure - smoke colour and when, oil consumption & ease of cold starting and then I may be able to give better advice. Tony Brooks

nickalex
nickalex

Posted: Sat Aug 08, 2009 2:17pm

Post Subject: engine oil additive

thanks for your quick response. engine is a gardner 3lw. no problems with cold starting. doesn't seem to use much oil. blue smoke is on start up then improves but remains.it is particularly apparent on idle in locks etc.seems to improve after long sessions, greatly improved on thames last year. i realise that with these older engines you get some smoke but thought bores might be a little glazed. might be worrying about nothing. thanks for your time in responding. nick

Tony-B
Tony-B

Posted: Sat Aug 08, 2009 6:37pm

Post Subject: engine oil additive

Nick, a little bit of theory that might explain the problem. There are two types of diesel engine and your Gardiner, most Listers and my Bukh are of a type known as direct injection where the fuel is squirted straight into the cylinder. The modern buzz boxes squirt the fuel into a sphere in the cylinder head. Any diesel needs to swirl the air about inside the cylinder so fresh oxygen is constantly being blown onto the burning fuel droplets. If the swirl is not strong enough the droplet burns all the oxygen around it and then goes out. This leads to smoke in the exhaust. I think the smoke is a combination of black from carbon and white from tiny amounts of unburnt fuel, both combining to give a bluish tinge. Typically direct injection engines are not good at producing sufficient swirl at low speeds so when running light (like on canals)you tend to get a bluish haze (at the least) which gets better as you push the revs and load up. Although its a question of degree, from what you say I think your situation is fairly normal. It sounds very like my Bukh. I have found that using a fuel additive called Wynns Diesel Power 3 helps for a short time and fitting a better matched prop so the engine runs faster per mph made a bit more difference, but it still smokes a bit and it looks bluish but I also burn very little or no engine oil. My advice is to forget it and try to take it on the rivers every year so you can play chicken with the plastics and give the engine a good thrash at the same time. I can not be 100% sure but I very much doubt it has any bore glazing. Tony Brooks

nickalex
nickalex

Posted: Mon Aug 10, 2009 4:49pm

Post Subject: engine oil additive

thanks a lot for your reply tony. glad to know that it doesn't appear to be anything too sinister. i have always enjoyed 'ask the experts' in the magazine thanks for your good advice as ever. sign me up to an annual river run....plastics beware!!

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