Hi, I have a 2003 Ford Galaxy Diesel. I am not sure if I have a similar problem... However I know nothing about cars so please bare with me! I had loads of smoke coming from infront of the rear wheels. Intermitent, but told by garage it was the heat exchanger and a common problem. So first we replace a "glow plug"(?) - the problem got SIGNIFANTLY worse. So then we replaced the heat exchanger (at great expense). Anyway, although the smoking has now stopped, I now have a ticking noise and a high pitch fan noise coming from the engine, and the heat exchanger unit itself sounds like an aeroplane taking off. It is pretty loud, and you can hear it from inside the car when idle. This is intermitent and appears to happen when the car is either warming up - after 1 mile of driving, and I have just now discovered, poss when it is cooling down - I have just done 2 hr motorway drive and when I turned the engine off the car sounded like an aeroplane about to take off. (unfortunately I didn't look at the temp guage, but when I looked during journey it was about half way, there were no warning lights on dash though). The aeroplane noise from infront of the pass rear wheel continues even when the engine is turned off - for about 30 secs - 1minute, but stops suddenly. It is like it is turned off rather than dies down. A high pitch whir was coming from the engine during the last leg of my journey, and I assume the heat exchanger was prob going too, but driving too fast to notice. Garage insist they have done everything right and don't think their work could have caused these additional faults. And ofcourse as intermittent never happens when they look. They haven't a clue. But as far as I can see they changed a part that is now making lots of noise and I have extra noises from behind the dash (passenger side), I'm not blaming them, but they seem nervous about doing anything more (understandable I guess). Any thoughts, or are the noises what a heat exchanger is meant to make! (bearing in mind the old one was broken!) I have only had the car 17 months. Please help!! :glare: