My GTI Small port started to make this noise today when blipping the throttle. it is an initial knock mixed with induction sounds and quickly goes away.
I will disconnect altenator belt tomorrow to cancel it out.
Any idears or input would be good. I am hopping that it is not cam,oil and valve related.
When going to and from work today i noticed that under load the engine sounded like it was pinging. I thourght that i must have had some bad fuel as it has never done this before.
The engine runs fine. it is only that initial blip ans doesn't rattle all the time. I useing 5W 40 synthetic oil which is thin and need to change. Oil pressure is ok with this oil.