Join Date: Feb 2007
Location: Carrollton, Texas
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Rep Power: 10
The responders are right on course with all their questions and things you need to investigate. Here are a few comments to consider and some information concerning some of their questions.
Does the engine compartment smell of coolant? This would indicate a leak somewhere on the engine or even the heat exchanger. During the oil leak repair I would not be surprised if the coolant hoses were removed at some point or maybe repositioned to some extent. Checking the tightness of all the clamps on the hoses as well as the condition of the hoses would be a basic starting point.
Often times the engine's water circulation pump seal and bushing will begin seeping, if it wasn't in great condition to begin with, and the drive belt was tightened. (possibly during the oil leak repair) There is a weep hole on the bottom of the circulation pump shaft that can be viewed to check the integrity of the pump seal. If there is coolant present there after the engine is brought to operating temperature then shut down, (don't try to inspect this area with the engine running!) this would indicate the seal is failing and will lead to coolant loss. This can lead to coolant consumption, eventual engine temperature issues and maybe even coolant leaked into the bilge area. You will also note that "hot engine smell" (evaporating coolant) when you access the engine compartment.
As for the "how does the oil look" comment, if there is coolant getting into the oil it will begin to look "frothy tan" around the fill point standpipe and in extreme cases your crankcase oil level will increase. This would indicate possibly a head gasket allowing coolant to migrate into the oil system. Since the pressure is higher in the cooling system (when the engine is at operating temp) than in the oil system, the coolant can migrate accross a corroded gasket and into the oil system.
As for the "sheen on the water" near the exhaust during operation at the slip, could indicate that coolant is passing into the exhaust system during engine operation. Not good either, and could also be a gasket issue or maybe a crack in the head.
I'd recommend starting with the simplest things first since the problem resulted immediately following a maintenance event but get the issue resolved before going too far from the slip. It won't heal itself and if left unattended may cause an unexpected and possibly very expensive failure.
Opportunity is missed by most people because it is dressed in overalls and looks like work.