We just took our 2002 sentra (71,000) to a dealer yesterday because the heater was blowing cold, and they said it's the head gasket. The system had lost coolant and had air in it, so there was no hot water flowing into the core. I've seen other advice on the Internet that this car had a bad head gasket mad, and that they've started selling a better one since then. So I think the thing to do is buy the gasket from the dealer, just in case other outlets don't have the right one.Just wanted to know how many other people have had blown head gaskets in their Sentras with mileage between 55,000 and 70,000. I just had to have mine replaced at 62,000 and the dealership could give no explanation for it.
Looking at your photos it looks like they have changed the design of the new gasket around the left top corner in the first photo, the sealer doesn't go around the first hole on the top left anymore.Here are the photos from my recent head gasket replacement.
im pretty sure my 05 sentra has a blown head gasket. its been having a misfire for 3-5 seconds on startup, then runs fine. computer reads code P0300- random misfire. changed plugs, didnt help. ive had to fill it about once a month with coolant, but no visible leaks. would a pressure test of the cooling system tell me anything more?Here are the photos from my recent head gasket replacement.