These engines are legendary for intake manifold gaskets leaking, and this is exactly what's happening with this one. Yes, you will have to remove the intake manifold, and to do so, you will need the torque diagram to remove it, and also to torque the new one. It's best that you buy a Haynes manual so you know the exact procedure; it's a $15 insurance that you will be glad to have. If you aren't having problems with the head gaskets, I'd leave them alone personally, but if you want to undertake these, now would be the time to do so, as there's not a lot more to take apart. Main suggestion though, is to be absolutely sure you keep the push rods in the exact order and orientation, as they each have a unique wear pattern with the lifter. Changing them can cause them to lose their seal, depriving the valve of oil, and ruining your head.
SOURCE: Torque Spec for '99 Chevy C1500 5.7L engine lower intake manifold
On 5.7L engines, install the bolts and torque in sequence as follows:
SOURCE: 99 Chrysler 300m i found oil in the upper intake
itr could be or it cold just be little blow by, i would just clean it up and replace the pcv valve
SOURCE: my 99 pontiac grand am wont idle or start i
First thing I would do is a compression test on cylinders, then fuel pressure test. Make sure your starter relay is good. If it is cranking over but not firing could be fuel relay, fuel pump, and could be as simple as a vapor lock. Spray some starter fluid in the intake, if it fires up for a couple seconds, then tells you not getting fuel, and this narrows down the search to the fuel pump relay, fuel pump.
Now your statement is YOUR CAR wont start or idle, as you can tell that is two different things. Which one is it, wont start at all? or starts then dies because it wont idle?If it wont start, then check the things I just advised, if it wont idle, then that could be plugs,coils,idle arm, fuel filter possibly clogged. List goes on and on. Need to know little more detail of what exactly it is doing, and what you have already checked or tried for me to dissect it down more direct with trouble shooting. I can help you for sure, just little more info needed, or you can go through the list I just said and it will I am sure fix problem once you check and repair or replace as you come across that problem area that is not functioning proper. Thanks Mike
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Which engine does this have? Is it an LS 5.3?
no its 5.7 350 i belive its from a saburban 1500,will i have to take the intake manifold off?there is a water leak where the head and the intake come together.just afraid that it will leak into the motor.
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