Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Recommended Posts

Howdy, I have a 1998 Silverado 1500 with a 350. I bought the truck for parts but I might decide to fix it. The truck runs however water seems to dump out from underneath the AC compressor. The cooling system doesn't stay pressurized and the water comes out as fast as I can put it in. There's no coolant in the oil and it doesn't seem to burn any either. So I'm leaning towards it not being a headgasket. Any other ideas?

Link to comment
Share on other sites

There are 3 places that the water leak can occur and not have water in the oil: intake manifold gasket water port; the gasket between the block and the water pump on that side; or the freeze plug in the block right next to the water pump port on that side.


Of course, if it's a freeze plug you have to wonder if anything else was damaged by the freeze.


You can dismount the A/C compressor without disconnecting the lines and lift it out of the way to get a better view.

Link to comment
Share on other sites

  • 5 months later...
On 6/5/2017 at 8:46 AM, dcheeseman said:

Sounds like a freeze plug got pushed out or lower coolant hose to water pump, I'd check both!



Nah, it wasnt near either of these parts of the engine.  Turned out to be a bad intake manifold gasket.  Put a new one in and loaded it full of coolant, its been going fine for about 4 months now.  

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.