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- Mirage Turbo which I will buy on wednesday got 129000 miles on clocks - is it much or not for this engine?
129,000 miles is nothing for a 4g61t, or any other Mitsubishi engine, as long as they have been well-maintained.
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- what about reliability 4g61T? Is it hard engine like more of old japan engines or not? Mirage Turbo which I'll buy is totally stock.
It's an extremely reliable engine. Just as reliable as a 4g63t, if not more reliable. It's an engine with a very short stroke, and very long rods. This means it doesn't put a lot of stress on the moving parts of the engine. As long as it had the oil changed regularly, it will keep on going for a long time.
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- what is common problems in 4g61t?
Not having the timing belt changed regularly is the biggest thing that can go wrong. It needs to be changed every 60,000 miles. If it's not replaced, it can break, and that can destroy the engine. It is also a very good idea to replace the water pump at the same time as the timing belt, and all the seals, tensioners, and idler pullies that run the timing belt.
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- I have to buy valve cover gasket because it's wet in my future Mirage. In Europe we've got Colt C50 with 4g61 N/A engine. Can I buy gasket from this engine? Or which engine is similiar to 4g61t from other Mitsubishi models?
The valve cover gasket on the 4g61t is the same as a 4g61 N/A, and also the same as a 4g63T, or 4g63 N/A.