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Temperature Issue
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<blockquote data-quote="Izso" data-source="post: 1063619495" data-attributes="member: 2429"><p>Like what Pomen GTR said, Alu rads are not actually as efficient as copper rads. The only advantage alu has over copper is that it doesn't rust and most of the time aftermarket alu rads are made bigger so their surface area is larger. You're better off with a 2/3 layer copper rad imho.</p><p></p><p>Engine oils run at their optimum viscousity at 100 degrees celsius. So if you take out the thermostat it'll take the oil much longer to reach optimum viscousity and what does that mean? It means your engine is not getting the proper lubrication for a longer period of time. And why is that important? 90% of all engine damage occurs at cold startup. So if it's cold longer, more engine damage. We're not talking catestrophic breakdown here, just faster wear and tear of the piston rings, valves, bearings and generally most metal bits and pieces inside the engine.</p><p></p><p>In this BOT overheating case - can I ask if you are using oversized pistons? Or did you just plug and play K3VET low comp pistons? I suggest you change your radiator cap as well as the thermostat to an aftermarket thermostat. It sounds like it's not opening early enough to compensate for the larger heat the BOT is causing. Either that or your radiator is not getting enough air. Some Myvi bodykits are very restrictive and what some people do is drill holes in the front chassis bit that's blocking the radiator.</p></blockquote><p></p>
[QUOTE="Izso, post: 1063619495, member: 2429"] Like what Pomen GTR said, Alu rads are not actually as efficient as copper rads. The only advantage alu has over copper is that it doesn't rust and most of the time aftermarket alu rads are made bigger so their surface area is larger. You're better off with a 2/3 layer copper rad imho. Engine oils run at their optimum viscousity at 100 degrees celsius. So if you take out the thermostat it'll take the oil much longer to reach optimum viscousity and what does that mean? It means your engine is not getting the proper lubrication for a longer period of time. And why is that important? 90% of all engine damage occurs at cold startup. So if it's cold longer, more engine damage. We're not talking catestrophic breakdown here, just faster wear and tear of the piston rings, valves, bearings and generally most metal bits and pieces inside the engine. In this BOT overheating case - can I ask if you are using oversized pistons? Or did you just plug and play K3VET low comp pistons? I suggest you change your radiator cap as well as the thermostat to an aftermarket thermostat. It sounds like it's not opening early enough to compensate for the larger heat the BOT is causing. Either that or your radiator is not getting enough air. Some Myvi bodykits are very restrictive and what some people do is drill holes in the front chassis bit that's blocking the radiator. [/QUOTE]
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