Cheap and easy decoke
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- Minor Legend
- Posts: 2437
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Cheap and easy decoke
Well that got your attention!
As you may have read I accidentally filled my MGB up with diesel last week.
I thought it was my imagination, but after a drive this evening I'm sure it's running better than it did before, smoother and faster ( ask the BMW driver I just passed on the bypass!).
I noticed that the diesel had cleaned the inside of the float chambers on the carbs. Do you think it has worked like a big dose of redex and degummed the rings or cleaned the combustion chambers? I don't know what else it could be perhaps the valves were a bit sticky before and its cleared that.
Any other suggestions?
As you may have read I accidentally filled my MGB up with diesel last week.
I thought it was my imagination, but after a drive this evening I'm sure it's running better than it did before, smoother and faster ( ask the BMW driver I just passed on the bypass!).
I noticed that the diesel had cleaned the inside of the float chambers on the carbs. Do you think it has worked like a big dose of redex and degummed the rings or cleaned the combustion chambers? I don't know what else it could be perhaps the valves were a bit sticky before and its cleared that.
Any other suggestions?
This message board is like a family - you can't choose the other members!! But remember engine oil is thicker than water.
As I said on your other post Rog - It's good for the engine. Just not too much and not too often. A half gallon a year should be fine. My Gramps used to do this regularly on his Morris Eight to save having to keep taking the head off every 30,ooo miles.....
[sig]8426[/sig]
Compare the Minors - Simples !! http://mog.myfreeforum.org/index.php
Compare the Minors - Simples !! http://mog.myfreeforum.org/index.php
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- Minor Legend
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What's the best way to apply it then? 1/2 a gallon in a full tank?
As to it running better I would imagine it will have cleaned out the exhaust and manifold of a large amount of soot etc. Anyone who has applied Redex through the manifold of a stationary engine and waited the required 10 mins will know what it looks like. It's like driving the Flying Scotsman down the road Very unnerving. I did it regularly on all my carb fed cars and never got used to it. There wasn't a time when i didn't think I'd killed the car it was that messy - and how I didn't get pulled by the nick was a stroke of luck. I Redex'd a car in the motorway services once. Drove it to the start of the sliproad and bottled out. if I'd got back on the motorway I'd have caused a pile up.
As to it running better I would imagine it will have cleaned out the exhaust and manifold of a large amount of soot etc. Anyone who has applied Redex through the manifold of a stationary engine and waited the required 10 mins will know what it looks like. It's like driving the Flying Scotsman down the road Very unnerving. I did it regularly on all my carb fed cars and never got used to it. There wasn't a time when i didn't think I'd killed the car it was that messy - and how I didn't get pulled by the nick was a stroke of luck. I Redex'd a car in the motorway services once. Drove it to the start of the sliproad and bottled out. if I'd got back on the motorway I'd have caused a pile up.
Older and more confused than I could ever imagine possible.
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- Minor Legend
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Please note I did not make a recomendation about adding diesel to petrol. I simply made an observation that it seems to have cleaned my engine somewhat.
I made a mistake and filled up with the wrong fuel I didn't do it on purpose. I'd hate anyone to have a problem and blame it on advice they got here.
I made a mistake and filled up with the wrong fuel I didn't do it on purpose. I'd hate anyone to have a problem and blame it on advice they got here.
This message board is like a family - you can't choose the other members!! But remember engine oil is thicker than water.
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- Moderator
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bear in mind that using diesel can be terminal for a petrol engine....
Ray. MMOC#47368. Forum moderator.
Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
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- Moderator
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I'm only aware second hand, so I'm not saying it's gospel... however the diesel won't burn correctly so 'can' make a sticky varnish substance on the bores/rings and valve guidesHow does that happen Ray?
However if you use 95% diesel on a refill, you're not likely to get far enough to do any damage. I have no info about using a low % diesel or how much it takes to cause problems, but I have heard of people using it in 2 stroke petrols as well, so it may well work.
It's just that diesel in Petrol engines is generally considered very risky.
Ray. MMOC#47368. Forum moderator.
Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
Much worse the other way round - although sometimes petrol is added to diesel in v cold weather to stop it waxing.
I suggest rather than add it to the tank - where there is no turning back - just dribble some into the carb while the engine is running at a fast idle. Best done out in the country I suspect - because there will be a smokescreen. In fact - water does a very similar job - and is best sucked in to the engine via the little dizzy vacuum pipe! Same idea - fast idle with hot engine - suck in 0.5 litre water - should clean up the engine quite nicely, and zero cost.
I suggest rather than add it to the tank - where there is no turning back - just dribble some into the carb while the engine is running at a fast idle. Best done out in the country I suspect - because there will be a smokescreen. In fact - water does a very similar job - and is best sucked in to the engine via the little dizzy vacuum pipe! Same idea - fast idle with hot engine - suck in 0.5 litre water - should clean up the engine quite nicely, and zero cost.
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- Minor Fan
- Posts: 206
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- Location: Guildford, Surrey
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Re: Cheap and easy decoke
Guessing the catalytic converters on modern cars may not like that much ? (Just a guess)