I've just opened one Fiat Uno turbo 1.3 engine.
Some idiot was driving it on carburator and it detonated(on 3. cyl as I found up when I opened the engine) and cyl head have cracked.
The valves are a total mess.
The pistons "top" is totaly black and thaey are pretty carbonated(is that the right word? :oops: ).
I'v tried cleaning them with Nitro Diluent and Spray for Cleaning Carburetors but nothing really helped.
What to do? :oops: :roll: :?:
Pistons Cleaning???
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Testament
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Yugo_Turbo
Uno turbo is fuel injected of course.This guy fitted carburator instead fuelinjection system and ignition system from N/A yugo55 without boost retard.
And OF COURSE engine knocked.
Because carburator was delivering too much fuel it "painted" pistons,chamber and valves completely black.
A will try to find someone with solvent bath.
Thank you.
I've allready disamentelled the engine.
And OF COURSE engine knocked.
Because carburator was delivering too much fuel it "painted" pistons,chamber and valves completely black.
A will try to find someone with solvent bath.
Thank you.
I've allready disamentelled the engine.
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Guy Croft
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Hi
before you clean anything read the topics in the GC Virtual Workshop (V/W), regarding pistons and bores in the block prep section.
The bores, rings, pistons may well be worn beyond the point of re-use, always inspect and measure first.
This being the GC Q&A - only when you have done these detailed checks and reported the dimensions here will I offer advice on further prep.
If you do not have the measurement tools buy them. If you have them already - well done. Many people try to do these overhauls without measurement tools, how they expect to get acceptable results is a mystery to me.
GC
before you clean anything read the topics in the GC Virtual Workshop (V/W), regarding pistons and bores in the block prep section.
The bores, rings, pistons may well be worn beyond the point of re-use, always inspect and measure first.
This being the GC Q&A - only when you have done these detailed checks and reported the dimensions here will I offer advice on further prep.
If you do not have the measurement tools buy them. If you have them already - well done. Many people try to do these overhauls without measurement tools, how they expect to get acceptable results is a mystery to me.
GC
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Julian
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Subject to Guy's advice above you are going to need a proper decarb-solution for that one. We use APT metasoak (available in UK but not sure beyond that) but you have to be very careful with it as it can do some really nasty things to your skin.
Nothing quite like it though.
The solution is generally mixed to about 1 part in 20 for heavy duty decarb or 1 part in 100 for light duty. If anything has been surface treated or coated it can be a very bad idea to use it at anything more concentrated. Pistons can be a particular worry as they often have coatings on the crowns. Watching your expensive custom made pistons dissolve in a fizz of metal can be heartbreaking...
They have a "soft" option too which leaves everything smelling nicely of orange but not sure if that is really appropriate for engines... :D
See APT's website for more details: http://www.apt-chemicals.co.uk/html/main.htm
Nothing quite like it though.
The solution is generally mixed to about 1 part in 20 for heavy duty decarb or 1 part in 100 for light duty. If anything has been surface treated or coated it can be a very bad idea to use it at anything more concentrated. Pistons can be a particular worry as they often have coatings on the crowns. Watching your expensive custom made pistons dissolve in a fizz of metal can be heartbreaking...
They have a "soft" option too which leaves everything smelling nicely of orange but not sure if that is really appropriate for engines... :D
See APT's website for more details: http://www.apt-chemicals.co.uk/html/main.htm
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Guy Croft
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Yes, I use it too, on the specialised list on that site, described as:
METASOAK -Non Caustic Alkaline Degreaser
A non-caustic low foaming cleaner METASOAK provides maximum cleaning and rinsing action and is suitable for use on all ferrous and non-ferrous metals. Removes fats, oils, greases, carbon and can be used through spray washers and dip tanks, etc
I must admit though that the carcinogenic nature of the fluid bothers me a lot, it is very dangerous stuff indeed, get a lot on your skin by accident or in your eyes, you're in real trouble. I use it a lot less than I used to.
Jizer and Comma Hyperclean are water soluble cleaners with corrosion inhibitor and I use them a lot. Slower, lot more scrubbing with Scothbrite and brushes but as safe as houses. Fortunately I have a Guyson beadblaster and powerwasher too.
GC
METASOAK -Non Caustic Alkaline Degreaser
A non-caustic low foaming cleaner METASOAK provides maximum cleaning and rinsing action and is suitable for use on all ferrous and non-ferrous metals. Removes fats, oils, greases, carbon and can be used through spray washers and dip tanks, etc
I must admit though that the carcinogenic nature of the fluid bothers me a lot, it is very dangerous stuff indeed, get a lot on your skin by accident or in your eyes, you're in real trouble. I use it a lot less than I used to.
Jizer and Comma Hyperclean are water soluble cleaners with corrosion inhibitor and I use them a lot. Slower, lot more scrubbing with Scothbrite and brushes but as safe as houses. Fortunately I have a Guyson beadblaster and powerwasher too.
GC
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Evodelta
If you're on a tight budget try oven cleaner, there are many different types, some better than others, if it can get food baked on at such high temps it's probably quite good at removing coke, watch out it doesn't attack the alloy though.
I did read that a combination of Mr Muscle (oven cleaner), petrol and paint stripper works wonders, although I must really warn against mixing up such hazardous substances together and would advise against it.
I recently washed a couple of heads in my dishwasher, it made a good job of attacking the coked up exhaust ports (another cycle would have seen them perfectly clean) ,fantastic results! It made a real mess of the dishwasher though :oops: It's a good job I'm not married!
I did read that a combination of Mr Muscle (oven cleaner), petrol and paint stripper works wonders, although I must really warn against mixing up such hazardous substances together and would advise against it.
I recently washed a couple of heads in my dishwasher, it made a good job of attacking the coked up exhaust ports (another cycle would have seen them perfectly clean) ,fantastic results! It made a real mess of the dishwasher though :oops: It's a good job I'm not married!
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Guy Croft
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well, Evodelta
my Guyson machine is only an overgrown dishwasher, figure it would be handy to have a small domestic dishwasher for smaller parts, you could be onto something there!
Just be aware readers that caustic detergents and acidic solutions can damage some engine parts, bearings eg. Choose chemicals with care.
BTW I use Wynn's brake cleaner for final pre-build cleaning, we did a lot in Hart's F1 firm too. In fact that was used excusively (so I understood) till they got a large ultrasonic tank.
GC
my Guyson machine is only an overgrown dishwasher, figure it would be handy to have a small domestic dishwasher for smaller parts, you could be onto something there!
Just be aware readers that caustic detergents and acidic solutions can damage some engine parts, bearings eg. Choose chemicals with care.
BTW I use Wynn's brake cleaner for final pre-build cleaning, we did a lot in Hart's F1 firm too. In fact that was used excusively (so I understood) till they got a large ultrasonic tank.
GC
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- Guyson cleaner at the back of the shop, uses corrosion inhibiting Guyson detergent, very good for blocks after honing and air-dries very effectively via stack-pipe ventilator, saves hours of work.
- engine shop_01.jpg (75.85 KiB) Viewed 7061 times
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Evodelta
Well, you know what they say Guy, " Necessity is the mother of all invention"!
I got the idea when I had a visit to my local turbo reconditioners, they had the proper machine of course, but were using everyday dishwasher tabs in it so I figured there were a lot of similarities, I was surprised at how well it attacked the coke in the ports though. Like I mentioned earlier I wouldn't recommend it at home if you need to keep the existing status quo with the missus.
Martin.
I got the idea when I had a visit to my local turbo reconditioners, they had the proper machine of course, but were using everyday dishwasher tabs in it so I figured there were a lot of similarities, I was surprised at how well it attacked the coke in the ports though. Like I mentioned earlier I wouldn't recommend it at home if you need to keep the existing status quo with the missus.
Martin.
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Yugo_Turbo
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