用錯engine oil 個evapouration valve壞左 或 engine cooling唔到都會引致咬油,. valve stems,  valve seals出事亦會出現大咬油. 如果係 cylinder head gasket leakage 可以check 下d死氣有冇油臭味, 又或者 coolant return reservoir會有 emulsified 油漬. engine compression test 都可以搵出internal leak o既問題.

e46咬油係正常的, 正常渣平均10000km 1 litre.

[ 本帖最後由 keibeast 於 2006-12-21 01:08 AM 編輯 ]

又打到中文啦

日本車的 operating temperature都係低ｄ的，　所以果ｄ因高溫氣化的油就少ｄ．　大部分的歐洲車引擎都是高溫ｄ，　咁氣化就多左，　流回crankcase就少ｄ，　見過有D車連個evaporation valve都冇就直接連去 throttle body潤滑順便燒埋. 以前整車時見過有架 C200改turbo, 就加個cooling can將d氣化左o既油condense之後從dipstick tube流回 crankcase

Mercedes 83-97 owner manual 有寫 oil consumption 係正常的. 用舊左重會多d, 如果係近期買e46咁新o既車, 應該唔會有咁嚴重o既問題.

不過好多時咬油都係因為piston rings 磨花左 cylinder所致. 如果係新車冇modified air cleaner又或者一撻車未上油就扮有型咁踩油,  應該唔會有d咁o既情況.

[ 本帖最後由 keibeast 於 2006-12-28 12:49 PM 編輯 ]

引用:

原帖由 kkwong7606 於 2006-12-28 03:55 PM 發表


因為piston rings 磨花左 cylinder所致" the chance of this reason is Big How I can identify? Or the only thing is asking workshop to check again?  

如果engine wear, 耗油量增加,  架車會冇力. d engine oil 會有好多金屬 desposites. engine compression test或bmw o既 on board computer 都會顯示.  如果係氣化得太厲害, 拆開個 throttle  body 會見到好多油漬或 tar.如果 benz  4 個控制入氣 o既hydraulic dup 磨損左都會咬油. bmw 好似都有差唔多o既 variable intake技術.

你最好check 清楚 compression test report, 睇下d數字係唔係差唔多.

引用:

原帖由 Jeff9394 於 2007-1-5 09:27 PM 發表


你 玩 過 新 E-Class 同 S-Class 未?

尤其是 v8, 問題多到嚇死人, 整車佬就高興. 樣樣野都要換. 換左仲未必得.

引用:

原帖由 Jeff9394 於 2007-1-9 02:41 AM 發表


尾 水 6L V12 先 係 最 高 鋒 係 唔 係 咁 話

less people bought, less problems revealed

我以前整 BENZ收得平只有熟客幫襯, 到收貴三四倍時D人至有信心架

wof TESTING STATION 而家要 50幾蚊

我講平時200蚊坎得O既, 如果唔收600蚊D人O既心理會唔多開心, 成日刑住架車仲有事.

最後架bm 問題點呀 ???

小心投訴接受, 處理照舊... 不了了之

先去消委會問下有冇權去追果d 在保養期內已經知道架車有事, 而未有辦法在保養期內完成的 case. 如果有須要可以由有法律見證效用o既人出封信叫佢地訂一個期限交代清楚.

HARD TO TRUST ANYONE OTHER THAN MYSELF.

今日同個 friend 吹開水, 佢以前在南非 east london bmw度做. 佢話 tropical 地區 bmw motor oil 半年 5000km internally 流失少於 1 litre 係正常的. 通常motor oil 油流失得快好多都係 worn piston ring (內) 或 rocker cover gasket leak (外). computer 係 check 唔到的.

以你果架車咁, 如果係兩年車就好唔正常.

ASK THEM TO EXPLAIN WHAT THE CAUSE OF OIL ESCAPE IS. THE GUY I WHO TALK TO IN THIS MORNING WAS AN BMW MECHANICAL ENGINEER. HE SAID THAT YOUR CAR IS ABSOLUTELY "ABNORMAL" FOR THIS HIGH RATE OF OIL LOSS.

USING A MIRROR FOR CHECKING THE CONDITION OF THE CYLINDER/PISTON ?? I LEARNT IT NOW, LET GO TO THE MEDICAL SHOP AND GET AN FIBRE-OPTIC CAMERA

通常唔洗用d咁貴o既野, compression test就知, 當然如果有蛇仔 fault finding一定易好多

用速成打　月一２　會似ｄ

肛肛肛肛肛肛肛肛肛肛肛門個肛
compression test is quite easy to be done, for bmw i will take 30-45 minutes.