Hey guys! So I bought a 2005 350z de non rev up this past year and did a full tear down on it. It had a few leaks and had signs of overheating. I replaced a ton of parts, all gaskets, new water pump, new thermostat, new head gaskets and even got the heads resurfaced and compression tested. After getting everything back together I noticed that my coolant is leaking from what seems like the water pumps weep hole before I even start the car and that when I start the car it gets a lot worse and now coolant is mixing with my oil in less than 5 min. I’ve tried replacing the water pump twice now and it’s still doing the same thing. I even bought a new oil cooler to see if that was the problem as well but nothing seems to fix it. I know I’m probably gonna have to tear everything down again but I was wondering if anyone had any clue to what the issue could be? Anything helps!

 

Welcome, but from your initial thread, I'd guess that your rebuild is the most likely culprit. With a coolant leak that "gets a lot worse and now coolant is mixing with the oil", there's something going on with the head gaskets. Whatever you do, do it quick, as delays could be fatal to your VQ.