請教專家，看圖

 

問題1：這個應該是overheating，對不對？

問題2：網上查，說可能原因很多。行家們認為那些屬於常見原因?

A white colored plug is caused by engine overheating. Failure to repair this engine will result in severe engine damage. Common causes for this are:

Incorrect spark plug (too hot heat range).

Low octane fuel.

Timing is not set properly. 

 

Cooling problems, (dirty cylinder fins, no or low water if water cooled, low or no engine oil). 

Carburetor air/fuel mixture is too lean (too much air). 

Leaking crankshaft seals, no oil, base or head gasket leaks, or crankcase leaks on two stroke engines.

問題3：這樣的plug會導致lean還是rich？

 

謝謝

所有跟帖： 

• 回複：請教專家，看圖 -biglow- ♂ (455 bytes) () 07/10/2011 postreply 08:10:48

• 班長也在哈。周末好 -滿地找牙- ♂ (366 bytes) () 07/10/2011 postreply 08:24:04

• 怎麽知道plug的工作溫度範圍？看說明書？ -滿地找牙- ♂ (48 bytes) () 07/10/2011 postreply 08:30:41

• 對了,我可能還有vacumn leak需要fix -滿地找牙- ♂ (66 bytes) () 07/10/2011 postreply 08:34:34

• 那就是了 -biglow- ♂ (205 bytes) () 07/10/2011 postreply 08:59:11

• 多謝多謝。 -滿地找牙- ♂ (0 bytes) () 07/10/2011 postreply 09:03:12

• sparkplug 還有冷熱分別嗎？ -triangle- ♂ (41 bytes) () 07/10/2011 postreply 11:03:51

• 自己放狗去查。 -biglow- ♂ (0 bytes) () 07/10/2011 postreply 12:51:54

• EGR堵了8 -bushihandyman- ♂ (0 bytes) () 07/10/2011 postreply 12:14:23

• 買新車了麽？ -nissanusedcar- ♂ (0 bytes) () 07/10/2011 postreply 08:50:10

• 正在編寫研究報告 -滿地找牙- ♂ (0 bytes) () 07/10/2011 postreply 08:56:36

• too lean(too much air). clean fuel system may help. -nonego- ♂ (0 bytes) () 07/10/2011 postreply 17:21:01