Because it's leaking somewhere. Other than lines in the cooling system, head and intake manifold gaskets are a possibility.
On a 1999 Camaro, the map sensor is located on the back of the intake manifold. The intake manifold is the series of tubing that distributes the air coming into the engine.
Year, make, model and engine info would help but, the intake manifold gaskets are known to leak coolant on many Chevy/GMC engines.
The egr valve should be coming off of the exhaust manifold.
the inlet manifold could Be leaking so check the gaskets or the injector seals
it sounds like your exhaust manifold gaskets are leaking or you half a hole in your Y pipe
Probably a gasket or seal. Could be the rocker cover gaskets, intake manifold gaskets, or end rail seals. Have even seen the oil pressure sender leak and spray up onto the manifold. Get everything cleaned up real good and you'll be able to see where it's coming from.
The oil leak is coming from the valve cover gasket and leaking onto the exhaust manifold, the rubber valve cover gaskets get hard from the engine heat and start to leak, you will have to replace the rubber valve cover gaskets to stop the oil leak
usually coolant leaks come from bad gaskets... or a bad water pump.. i would say drain the system and run water through the radiator (do NOT drive with water in the radiator, your engine will surely overheat!) and see if you can spot where the coolant is coming from... if it is coming from the engine block then you might have bad gaskets.. if not then it's the water pump.
im having the same problem with my 99. i know the V6 engines have problems with the intake manifold gaskets. only problem is my leak is coming from somewhere by the reservoir as well. check the gaskets and see if it is leaking around them. if not...hop on the troubleshoot train that I've gotten onto. good luck bro, they are great cars. i love mine.
Also losing coolant i believe. That would most likely be head gaskets. And hopefully only that.
Check the water pump. Examine it for traces of dried coolant that might be leaking out of the casting.
You just have to see where it is leaking. There are numberous gaskets and hoses it can be coming from. Have it preasurized and it will be easier to find.
You may have bad head gaskets when,you are losing engine coolant and you don't see any leaks.you see a white smoke (steam) coming from the exhaust pipe.you have a sweet smell coming from the exhaust pipe.you see air bubbles in the radiator coolant with the radiator cap off and engine running.
HeyHoward==If it is coolant the engine will overheat quickly and the engine will smoke white smoke. The head gaskets will need replaced. It can be normal condensation if it is pretty clear water. Good luck, Joe
check your coolant levels & if car overheating, might well be the cylinder head gasket is away.
It is on the front of the intake it has three wires coming out of it done had to replace 1 myself the water pump is right below it
If it's not coming from the valve cover gaskets, could be from the rear rail of the intake manifold, or maybe it's from the oil filter seal, or possibly the pipe plug above the oil filter.
its coolant could be a head gasket or the coolant can actually rust trew the block or the head check the dip stick if its a creamy and it smells nasty or check you colant if it smell like cofe then you know coolant is getting in were its not supose to. white is coolant blue is oil and black is fuel hop that can help you
You may have bad head gaskets when,you are losing engine coolant and you don't see any leaks. you see a white smoke (steam) coming from the exhaust pipe. you have a sweet smell coming from the exhaust pipe. you see air bubbles in the radiator coolant with the radiator cap off and engine running. you see a milky substance collecting on the engines dip stick and/or engines oil cap..
It's difficult to say, without seeing where under the hood it's coming from. You could have a bad exhaust manifold gasket, leaking exhaust. You could have valve cover gaskets leaking or seeping oil, which would drain onto the hot exhaust manifold, and burn off... If you can provide more information on where the smoke is coming from, there may be a better answer.
the water pump gaskets start to leak (right or left, or both) and the coolant runs down the block to the oil pan/ block joint and appears to be coming from the oil pan. follow the leak closely, and you will probably see that it is coming from above the oil pan in the front.
Where was the leak coming from? the coolant has some pathways that go to the intake. that's to warm up the air.the most important question is where the coolant was leaking from?
i have had an antifreze leak also but at the front it was the intake gaskets and have two frends with tahoes that needed intake gaskets also