[chunkymonkey]

Hey guys, i just joined up and this is my first post. I have a 98 Monte LS 3100 with some overheating issues like many others. I just changed the water pump because i saw steam coming out of it... so i assumed the gasket went bad, but wanted a new one. So that went fine but now im still over heating. Ive read a lot about the intake manifold gasket, but the oil is fine. i thought i had air caught in the system until i pulled out of my work parking spot and found all of my coolant leaked out... trailing down to a drain in the concrete. what areas should i check out on the car? it looked like it was coming from the rear passenger side of the engine, but i couldn't feel or see coolant.


If it was the LIM gasket would it leak out while parked? The waterpump that i got from NAPA had a gasket that almost didnt line up with all the holes... could this gasket be causing this much water loss? the hoses seem OK, but very old, and all the hose clamps are on right....

any immediate thoughts besides pressure testing? I'm buying the tester on my way home tonight.

Thanks guys,

Rick

[me6894]

chunkymonkey, on 18 February 2010 - 11:40 AM, said:

Hey guys, i just joined up and this is my first post. I have a 98 Monte LS 3100 with some overheating issues like many others. I just changed the water pump because i saw steam coming out of it... so i assumed the gasket went bad, but wanted a new one. So that went fine but now im still over heating. Ive read a lot about the intake manifold gasket, but the oil is fine. i thought i had air caught in the system until i pulled out of my work parking spot and found all of my coolant leaked out... trailing down to a drain in the concrete. what areas should i check out on the car? it looked like it was coming from the rear passenger side of the engine, but i couldn't feel or see coolant.


If it was the LIM gasket would it leak out while parked? The waterpump that i got from NAPA had a gasket that almost didnt line up with all the holes... could this gasket be causing this much water loss? the hoses seem OK, but very old, and all the hose clamps are on right....

any immediate thoughts besides pressure testing? I'm buying the tester on my way home tonight.

Thanks guys,

Rick

Are you sure you lined the gasket up right? It only goes on one way. If you rotate it on the pump the holes no longer line up unless you force them to.

Get a pressure tester and hook it up to see where your leak is coming from.

[chunkymonkey]

yeah the gasket was weird... i flipped it and rotated it until i found a way for the holes to line up like 90% overall... the part that bothered me most was that there was a long tab on the outer perimeter of the gasket that didnt need to be there.

also, the water pump spun smooth, but not freely. i watched a video on youtube of someone spinning their water pump and it spinning like a bicycle tire... where as mine would spin maybe one revolution or two.

Thanks,
Rick

[Donutboy97]

I've had the gasket on the timeing chain cover cause coolant leaks. I'd double check the water pump again and do a pressure check and look at the timeing chain cover too.