Sounds like you may have dropped something down inside of one of the heads when you had the intake off.
Is it full of fresh clean oil and a new filter????
It would be to your advantage to buy a Haynes Manual as it would have just what you need to complete the job. They are specific to the car you own.
Water is in your engine. Check intake and head gaskets.
You have to remove the upper intake to even get to the fuel rail. make sure you have all the o-rings seals and gaskets in between cause you should replace them. Really its worth it to take the car to a mechanic.
Thermostat's starting to stick. Needs replacing a.s.a.p. Most Malibu with the 3.1 engine have the same problem and it's your intake manifold gaskets that are probably bad... Intake gaskets are located in the middle of the valve cover and reach the bloc (V). Look with a flashlight near the bloc under the thermostat housing (rear) and behind the power steering pump (front)if you see coolant in these areas your intake gaskets are probably bad. Check engine oil dipstick for indications of a milkshake and high level of oil... on my car, oil was clean but changing intake gaskets solved the coolant slowly leak problem. Before attempting to replace your intake gaskets, have your head gaskets tested by a mecanic. Because if they are bad too (will appen if you wait before solving the problem and that your engine overheat too much), one you have reached intake gaskets, it's not verry complecated to to replace them too. Only exaust manifolds will be on the way before removing the heads. If they are good, just search for the procedures on sites like autozone.com or search in Google... on how to replace intake gaskets. I've already written the entire procedure I think on this site. I'm not a pro and I've done the job myself. Have your cooling system bleeded by a mecanic after you've done the job... By doing it yourself, you'll save hundreds dollars!
it could possibly have either a blown head gasket or intake manifold gaskets leaking
Not too hard for some with some mechanical ability. Noot all of us have it. Get a manual on your car from DISCOUNTAUTOREPAIRMANUALS.COM and see if you want to try it. This is a pretty big job. Get a manual on your car from DISCOUNTAUTOREPAIRMANUALS.COM and you can read about it and see if you want to tackle it.
Because it's leaking somewhere. Other than lines in the cooling system, head and intake manifold gaskets are a possibility.
Sell your car.
The year, engine size and if it is the intake manifold or an exhaust manifold gaskets would help.
coolant by pass hose needs repaced under intake manifold to water 1996 Lincoln town car
ours was making a teerrible knocking noise like it was low on oil. also the check engine light was stuck on. had a shop replace some gaskets (upper manifold maybe?) and noise is gone.
No.