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I replaced the lower intake gaskets about 6 months ago (96K) with the updated metal version and it started to leak coolant into the motor again107K not fast it’s just a very slow leak as the coolant level takes a while to drop. I pulled it apart and the gasket and manifold look fine but there is a pinkish residue build up at one of the coolant passages is that where it is leaking.
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Could be very possible that the leak was not just the gasket. You will want to fix this ASAP.
[video width=425 height=344 type=youtube]/00ZUtWPCMmM[/video]That is my old Grand Am after neglecting an intake leak. It had a misfire on cylinder #6 on occasion, and then one day it seized up. Coolant trickled down to the cam and seized the bearing, bending a pushrod, then the valve and sheared the cam in half. That is it running on about 3 cylinders.
You may have to pull that head off and have it inspected for a crack. There isn’t anything you can do that will 100% fix it. RTV would be a gamble. If you were inclined to try, make sure you clean the snot out of it with acetone and compressed air before you apply anything, and I’d use RTV designed for water pumps. However, it’s a risk you’d have to consider. At the very least, you would need to continue to monitor the engine coolant level.
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