[kd7iwp]

This weekend I removed the injectors from my 2002 Golf (ALH), with 95,000 miles, so that I could put the nozzles in my jewelery sized ultrasonic cleaner. I didn't really have any expectations, but just wanted to give it a try and let others know in case anyone else has been interested in the idea.

I wouldn't say I've noticed any differences in performance or anything. When my next tank of fuel runs down I can report back if fuel economy changed. I just put each nozzle into the cleaner for about 6 minutes and the fluid I used was regular Fuel injector cleaner that you can get from any parts store. There was some buildup of carbon on the injectors, but none really around the tip.

 

[kd7iwp]

Good point. I did keep the nozzles together with each injector and also stuck all of them back in their original cylinders.

One note of interest for others: After re-installing the injectors, 2 of them were leaking a bit of diesel around the bottom where the injector body meets the engine head. I tightened down the injector forks and that stopped the leaking on one, but not the other. The next day I started up the car and there were no leaks at all. So perhaps the new copper washers needed some time to hold their seal. Also, I had started and warmed the engine while it was leaking on the previous day, so probably having everything heat up and expand helped seal the washers.