Hi guys,
I am sorry my first post has to be about a catastrophic engine failure, but here is the story.
Any idea what could have caused this piston to melt like that. This is my Polo GTI 1.4 TSI-completely stock. I was driving hard and the check engine started flashing together with the EPC warning light. Car was running on 3 cylinders. Drove for another 7-8 miles home, car was smoking badly and had no power whatsoever. Pulled the plugs to find out the electrode in cylinder #2 was missing completely.
Fault codes were misfire cyl 2, multiple cylinder misfire, previously stored codes for catalytic converter efficiency below threshold, evaporative emissions control system incorrect flow (also stored previous to the incident).
Car was heavy oil user and I had the piston rings and valve seals replaced 1200 km before this incident happened, head was completely dismantled and cleaned, injectors were ultrasonic cleaned.
I did not change the plugs because I could not find the correct plug for the car at the time and was going to order them.
Now, I will have the cylinder sleeved and change the piston, but I am a bit worried that it might happen again. can a bad spark plug/no spark/broken elctrode cause the piston to melt?
I realize that the cause for the melted piston and plug may be high combustion temperature caused by lean condition, but what caused it is a mistery. failed injector? Car ran perfectly fine except lumpy idle at start up sometimes, which will smooth out after just a minute or 2. car is produced late 2011, October I think. I will post the scan of the codes shortly.
I am sorry my first post has to be about a catastrophic engine failure, but here is the story.
Any idea what could have caused this piston to melt like that. This is my Polo GTI 1.4 TSI-completely stock. I was driving hard and the check engine started flashing together with the EPC warning light. Car was running on 3 cylinders. Drove for another 7-8 miles home, car was smoking badly and had no power whatsoever. Pulled the plugs to find out the electrode in cylinder #2 was missing completely.
Fault codes were misfire cyl 2, multiple cylinder misfire, previously stored codes for catalytic converter efficiency below threshold, evaporative emissions control system incorrect flow (also stored previous to the incident).
Car was heavy oil user and I had the piston rings and valve seals replaced 1200 km before this incident happened, head was completely dismantled and cleaned, injectors were ultrasonic cleaned.
I did not change the plugs because I could not find the correct plug for the car at the time and was going to order them.
Now, I will have the cylinder sleeved and change the piston, but I am a bit worried that it might happen again. can a bad spark plug/no spark/broken elctrode cause the piston to melt?
I realize that the cause for the melted piston and plug may be high combustion temperature caused by lean condition, but what caused it is a mistery. failed injector? Car ran perfectly fine except lumpy idle at start up sometimes, which will smooth out after just a minute or 2. car is produced late 2011, October I think. I will post the scan of the codes shortly.
