MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: RMK87 on November 07, 2016, 02:26:18 pm

Title: Engine Problems. Help Needed
Post by: RMK87 on November 07, 2016, 02:26:18 pm

Hi All,

Was driving along and car starts juddering pretty violently. It still drives but engine shakes pretty bad. Get it to a garage in the morning and cylinder 3 is misfiring. Replace the coil lead and still misfiring. Pull the spark plug out and it was broken!

Mechanic said looks like piston hit the spark plug. Cant do that kinda job here for you. What am I looking at?

Timing belt/water pump, coolant, oil and spark plugs are all less than a month old. 

Title: Re: Engine Problems. Help Needed
Post by: flashp on November 07, 2016, 03:47:44 pm

I'm in no way an expert, but I might guess that this failure could be related to the recent work you had done. Re-examine all the work that was done. What condition is the timing belt in?
Slipped maybe??

Just a thought.

Title: Re: Engine Problems. Help Needed
Post by: pudding on November 07, 2016, 04:40:51 pm

The piston can't hit the spark plug unless the wrong kind is used (sits too far into the cylinder, but you'd know straight away!).   More likely the electrode got bent if someone dropped a plug on the floor, or it melted away due to detonation.  Need to see a pic really, and / or confirmation they are OEM plugs?