Installed new water pump on 90 Jeep. Noticed antifreeze around the edges of the pump. Took it off, replaced with new gasket and sealer, but it seams to be leaking again.
Take it off again and inspect the metal around the hole it is going in. Make sure there are no gouges or major damage. Besides that have a friend do the seal. I know what I am, doing and sometimes just a different method, or a new set of hands does the trick. That is probably the problem.
Most drainage piping is tested with head pressure. All openings are plugged and the main stack is filled with water to the area specs (usually at least 8') When the inspector arrives, he watches the level for 5 or 10 minutes for approval. Water supply lines are tested with air and a gauge. Most plumbers are too busy to try to fix the tests so the inspector arrives when he is not there and passes or rejects the test. Compressed air is usually used to detect any leaks. I have always set up the test early in the day so I can tell if there is a problem rather than paying to have the system reinspected.
Could be a defective pump. I've had that happen to me already. Might be that one of the surfaces still has some of the old gasket remaining or perhaps some uneven spots. In that case I would recommend high-tack gasket sealer by permatex. Check to see that the antifreeze is not coming from elsewhere like from a by-pass hose or from the intake. It could be possible that the pump was not the only thing at fault. Hope that helps.
Most likely cause: old gasket/sealer was not fully removed prior to installing new gasket. The gasket surfaces must be absolutely clean. Possible incorrectly machined gasket surface on replacement pump, but that's highly unlikely.
The surface on the engine block is not cleaned properly and is not allowing the new gasket to seal correctly. The other possibility is you have a defective replacement pump. This does sometime occure with parts from the national chains. inspect it closely to make sure the casing is not cracked if it is you need to take it back and get another one.
