I've had my low coolant light come on a few times over the last few days, at it's worse today. I checked the exp tank and the level is indeed a tad low, 1cm or so probably. I just wondered, do the water pumps on the Z20LET have the little hole that will start to leak water when the pump is beginning to fail? When I changed the oil the other week I noticed I had a dried water marks down the back of the engine underneath the alternator area where some coolant seems to have been leaking, would this be water leaking from the pump?
I can't see any actual hose leaks or anything and haven't had a chance yet to get the under tray back off and inspect further.
Unrelated to the above I am also getting some grinding type noise from the rear under certain cornering conditions. Most noticeable when taking a roundabout a bit sprightly, so right hand turns. I was thinking wheel bearing, but I cannot feel any play, do they fail without play, or would there be play if the bearing was worn? I guess the other possibility is engine side engine mounts as I've read that can make a horrid sound, but when going on/off the throttle in say a low gear I don't really hear anything that would suggest the mounts are dead.