A couple of questions.
Do you have to keep adding water?
Have you had the compression checked?
Have you had the intake Manifold inspected for cracks?
It almost sounds like you have a cracked intake of Cylinder Head. Hopefully a compression check will show where it is cracked.
Here is my take. If it was just a overheating problem, then I would look at the coolant components. But since you have running issues also, that makes me believe you have problems in the engine. Rough running like you describe does sound like a intake manifold leak.
Not sure how mechanically inclinded you are, but to replace the intake is not that hard of a job. Probably take you around 4 hours, or longer if you havent done it before.
If this were my car, I would probebly remove the intake and cylinder head. Have them both checked for cracks and warping. Repair if possible, or replace if bad.
NOTE: before sinking time and money in this car, you might want to check the compression and see if you might have major problems. If the compression checked good, I might be tempted to just stop with the intake. But definantly stop when you find a problem. If the intake is cracked, dont pull the head unless you have low compression or obvious signs of problems with it.
Thursday, August 24th, 2006 AT 2:10 PM