Lietuvos BMW Klubas

Jei kam nesyla, keiskit abu termostatus- tuo isitikinau. Nevarkit po viena keisdami ir tikrindami temeratura per atrakinta skydeli. Tik is kart abu. Nera sunku pakeist. Antra karta keiciant- butu lengviau, kai su tuo susiduri.
Pries keiciant buvo 76, po pakeitimo 92 laipsniai C.

na egr termostata nera ka keist, o uz pagrindini 150lt nori? nenoriu daryt antireklamos, bet jei neklystu, man servise uz 50lt~ pagrindini pakeite. nu bet dar antifryzo reikejo ir pan.

As pries porasavaiciu keiciau uz abu termostatu keitima 60 lt paeme

Iskilo man toks klausimas jei termostatai blogi tai ant kiek gali skritis kuro sanaudos jos pakeitus i gerus ?

As pries porasavaiciu keiciau uz abu termostatu keitima 60 lt paeme

Changing the main stat shouldn't throw any i-drive errors.

The following is merely my personal opinion, having been round this loop once before. If your motor is getting up to mid 80s celsius, then very little or no harm is being done to the engine or fuel economy, and I would question the need to do anything at all.

As has been mentioned elsewhere, 75C is the magic point for regeneration of the particulate filter. If the temp is struggling to go much above this, then that's the time for something to be done. If temps are even lower than this, then naturally issues will start to occur, and will more than likely have an impact on fuel economy and associated DPF issues due to a majorly borked main or EGR stat.

My reasoning for all of this is that I had both the main & EGR stats changed around this time last year, as the temperature frequently failed to get much above 80C. After fitting the stats, temps reached around 89C when cruising, however not more than a couple of months later this had fallen back to around 85-88C under the same conditions. I was initially concerned that something had failed within the new main stat, but 10 months later it's not changed a bit. It's certainly made no discernible difference to fuel economy. The DPF is also regenerating properly.

Individual stats will have tolerances; normally +/- 2C for open & close, with a 5-10C tolerance between open & closed. Some engines will therefore be slightly above 88, some a couple under.

In summary my opinion (for what it's worth..!) is not to worry if your temp is reaching mid 80s - it's within tolerance (just), and won't be doing any harm. 90C is not the 'holy grail' that it must reach! If the coolant temperature approaches mid 80s celsius within 5-10 miles, and heating the cabin nice and quickly, then there really isn't much wrong - it's certainly not worth the time or expense to raise the engine coolant temperature by a couple of degrees. If you had a damped analog temperature gauge, then such fluctuations wouldn't even register.