Hey guys, my mate has had his 04 GU series 3 for almost 2years. Hey went and got cooling system flushed and was told it could have cracked head or headgasket gone. It's never overheated or overheats, doesn't use coolant fast and no milky oil. Hasn't lost any power either. I'm trying to find out if anything else can cause this. I was told the EGR Cooler can have a leak ,but I can't find a picture of it in manual. It's a DI and was told it had a cooler too but not in pics. Drove for 2hours and not a problem. Any help would be appreciated. Thanks.