I have antifreeze leaking into my oil on a 95 Chevy Lumina Sedan. It has a 3.1 engine.?

Question

This started back about 2 months ago. I was hearing a strange sound coming from around the serpentine belt. I had my brother look at it and he said it was either the tensonier for the belt or it was the water pump so I just replaced both. After I replaced the water pump, the noise did not go away and my car began to run hotter then usual. It was not running hot at this point just a noticable difference in the temp. Over about a week it begin to run hotter and hotter until it finally over heated completely and I changed the thermostat and put it in. I also put some radiator flush in. It said to add pure water(no antifreeze at all) to the flush and run it for about 6 hours driving time. It ran like a charm for about 5 hours driving time but then it over heated all of a sudden. I was driving the interstate when the temp shot up and I started to pull over then it went back down. It did this about three time then it over heated. I pulled over to let it cool down and then I got home(less then a mile from where I pulled over). I got home and I most of my water was gone. I drained the rest out and started to put antifreeze in and bleed the air out but I poured 2.5 gallons it. It should only hold about 2 gallons and it never got full. So checked the oil and it has antifreeze in it. Anyway after all of that I know I need to check the head gasket and few other things but I have no idea what I am doing or what tools I need. Any help or advice would be appreciated.

Answer 1

bad head gasket or intake gasket.

Answer 2

I'd say that you have a bad head gasket.  If you've never done this kind of work before and you don't have the proper tools, you'd better leave it to a professional.

Answer 3

Bad intake mani gasket is the big issue on the 3100 v6.

You wait 2+ months to fix this???

I'd be surprised if the bearings aren't toasted by now.

Answer 4

Blown Head gasket would be my guess.

Answer 5

to pull the head you need to pull the exhaust manifold, take the intake off, drain the anti-freeze, to keep from bending the push rods, you need to loosen the rockers and pull the rods out. you need a breaker bar to loosen the head bolts, then take the bolts out, then the head should lift straight off.

Answer 6

I agree with db.  I have had a number of cars and maintained them mostly myself but this sounds like a job for a professional.  I  hope that driving it hot has not caused more damage.  replacing a head gasket is sort of easy compared to major engine work but it is time consuming and will cost several hundred dollars.  This should have been checked out when there was trouble was first noticed.  If there has been major internal engine damage you may find another car is the way to go.   Lots of luck    You will need it.

Answer 7

Yep...you either have a blown head gasket or a cracked or warped head. The last 2 will cost a lot....but more than likely when you over heated the head warped...letting the water flow into oil pan.

Take it to a shop to have it fixed.