I've just removed my old turbo from my daihatsu 2.8td DL-51 engine and was going to fit the replacement one but I noticed a difference. Both turbos say model RBH5 on the tag but the new one I brought has what looks like two extra ports on the side of the centre part. It looks like they might be for connecting to the water coolant system. Do I need to connect them to somewhere or can I just them them open?
Any advice would be much appreciated.