Intake manifold leak?
#1
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I have been loosing coolant rapidly but I dont see any external leaks from my 98 V6, my car is running very sluggishly it stalls out and theres a really bad miss on Cylinder 6. I already have had the oxygen sensor, fuel injector on #6, and spark plugs and wires changed very recently!
One day i opened the hood while the car was running and I saw there is a water leak coming from somewhere near the top of the engine presumably thats where my coolant is going..
I decided to do a quick search online and found out that it could be my intake manifold gasket leaking that could cause it to run real sucky.
How would I know for sure that it is my intake manifold gasket leaking???
One day i opened the hood while the car was running and I saw there is a water leak coming from somewhere near the top of the engine presumably thats where my coolant is going..
I decided to do a quick search online and found out that it could be my intake manifold gasket leaking that could cause it to run real sucky.
How would I know for sure that it is my intake manifold gasket leaking???
#2
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Check right under the throttle body to see if the L shaped plastic elbow is leaking. These get brittle, crack and leak. About $5 for a set of them and a couple hours of work to put them in. You can't see it from the top but you should be able to feel it.
#5
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,387
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You want to do a pressure test of the coolant system. If you search I posted a youtube video a few weeks back on how to do it.
This is the part Duck was talking about. As a general rule it will not cause a miss. Most intake leaks will not cause a miss because they leak coolant to the outside of the motor. the shinny part is where the water pump mounts on.
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Lose of coolant with no leak and a miss that started around the same time 90% of time will end up head gasket.
This is the part Duck was talking about. As a general rule it will not cause a miss. Most intake leaks will not cause a miss because they leak coolant to the outside of the motor. the shinny part is where the water pump mounts on.
![Name: IMG00010.jpg
Views: 942
Size: 44.9 KB](https://camaroforums.com/forum/attachments/93-02-v6-tech-14/33535d1501319866-intake-manifold-leak-img00010.jpg)
Lose of coolant with no leak and a miss that started around the same time 90% of time will end up head gasket.
#6
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Well, it could cause it to over heat if the coolant got low enough but misfiring, no. Have you had the radiator pressure test to see if it might be a leaky head gasket? If you are getting water in the cylinders, it will cause it to run like crap and misfire. I don't have a pic but Gorn posted one awhile back on a thread. Maybe he will see this and post it again.
LOL! I guess he posted it while I was trying to type!
LOL! I guess he posted it while I was trying to type!
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#10
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,387
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If you can not find where the coolant is leaking from you should do the pressure test. Most of the time a cold engine with pressure will leak more then a hot engine with pressure. This would make it easier to find. THe only way to pressurise a cold system is a pressure tester. If you can find the leak fix it first then do the pressure test. You can borrow the tool from Autozone.
http://www.youtube.com/watch?v=DgxbPHX-W_M
http://www.youtube.com/watch?v=DgxbPHX-W_M
Last edited by Gorn; 07-17-2010 at 10:58 PM.