Kia Carnival / Naza Ria engine problem / overheating
I have heard that the Kia Carnival / Naza Ria engine has a common overheating problem. I have recently rebuilt one of these engines and had a chance to have a closer look to the engine internally and understand the engine from design view point.
The KIA engine has a unique liner which is loosely sits in the cylinder block. When the engine is manually turned, the liner will actually pops out. By standard, such liner would require to be pumped into the cylinder block. It is high precision and when liner is fitted in, it stood pretty strong inside. A loose liner would means a fine gap between the block and liner, that is also where the oil and water supposed to be isolated.
It is known that the engine exceeds 100,000km mileage above, will likely be experiencing such problem. A smart customer visited us and initiated a preventive measure to counter this problem from arise.
Solution to this problem actually lies in a custom cylinder liner. A special grooved liner installed with a ring to isolate engine oil from water at the upper half of the cylinder block.
It also also common where one of the water pipe build in at the back of the engine get rusty and leaks. The tube must be replaced with a copper tube for prevention, illustrated by the photo below.
Upon reassembly and reinstalling of the engine into the car, we have added a temperature gauge to monitor the engine and discover an interesting behavior of the engine…. end of part 1.
To find out more about your KIA Carnival, a.k.a NAZA Ria and also preventive maintenance for your vehicle, please contact us today.