BenTrevor Posted April 6 Share Posted April 6 Greetings, ladies and gentlemen. I am a novice on this forum and I am eagerly seeking guidance from experts. I own a 2003 Mini with a 1.4 litre diesel engine. The vehicle is experiencing excessive heat buildup. Upon starting the engine from a cold state, the amount of coolant begins to increase. The heater alternates between emitting hot and cold air. I have conducted many olfactory examinations and all of them had negative results. I would much appreciate any guidance or recommendations. Quote Link to comment Share on other sites More sharing options...
Screwdriver_1 Posted April 6 Share Posted April 6 The vehicle is equipped with the Toyota 1.4d engine, so you may find more information about it by referring to similar Toyota diesel engines of the same age. These engines are known to have issues with head gaskets and cracked heads. The EGR cooler can also develop cracks, similar to other Toyota engines I have worked on in the past. It has been a long time since I last had a first-generation Mini diesel in front of me. One possible solution is to replace the coolant cap, as they can sometimes f Quote Link to comment Share on other sites More sharing options...
BenTrevor Posted April 6 Author Share Posted April 6 Thank you for your response. The cap. The water pump and thermostat have both been replaced. It is peculiar since the oil seems transparent and there is no emission of white smoke from the exhaust. My vehicle is equipped with a water preheater located close to the expansion bottle. I am inquiring whether or not it is obstructed. Quote Link to comment Share on other sites More sharing options...
Screwdriver_1 Posted April 6 Share Posted April 6 In some cases, the leak may be so small that it cannot be detected by the sniff tester. To address this issue, I have employed a method where I remove the plugs and drain the coolant. Then, I introduce smoke directly into the header tank using a smoke machine that also pumps in air. This allows me to simulate the pressure of the coolant. Additionally, I can heat the block using a space heater to replicate the effects of heat on the system. Alternatively, I can rapidly heat the car and quickly drain the coolant to perform the test. If smoke emerges from any of the plug holes, it indicates that there is a leak present. I frequently utilise my smoke machine for various purposes and consider it an essential tool for DIY car repairs, particularly with modern vehicles. Quote Link to comment Share on other sites More sharing options...
BenTrevor Posted April 6 Author Share Posted April 6 I explicitly stated my intention to only use internal combustion engines powered by petrol. However, however, I had just this one, which is rather amusing. I will no longer purchase diesel vehicles, haha. Quote Link to comment Share on other sites More sharing options...
Screwdriver_1 Posted April 6 Share Posted April 6 I prefer a diesel engine for its higher fuel efficiency, especially considering the age of your vehicle. Diesel engines generally perform well, but as they age, components might deteriorate and malfunction. Quote Link to comment Share on other sites More sharing options...
BenTrevor Posted April 6 Author Share Posted April 6 Indeed, it is accurate. Quote Link to comment Share on other sites More sharing options...
BenTrevor Posted April 6 Author Share Posted April 6 💯 Quote Link to comment Share on other sites More sharing options...
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