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Hey guys I have a leak somewhere on the top of the engine. I am assuming it is form the gasket on the top side of the water inlet. I am also assuming that there is a thermostat in that housing as well. When I look up parts all I see is a gasket with 3 holes. This one only has 2. I have included a pic. It seams to leak and fill up the sparkplug hole. It only seams to leak after you run it and park it for a while. I want to go on and replace the thermostat while I am in there. At least that is where I think it is leaking from. Also what procedure is it to fix. I looked in my manual and they say to remove some other elbow that has a gasket as well. That does not make sense to me to mess with that part if it is not leaking.

Tighten all the hose clamps first. That's the usual culprit.
If it still leaks, then clean it thoroughly and dry it.
Spray it with a talc powder
The leak will be obvious very quickly.
(Head bolts, t-stat, bypass housing, water pump, etc.)

I had a leaking radiator that caused similar puddles in a couple of my sparkplug holes

a few months ago, had a similar leak on my carefully rebuilt engine. What I did was to remove the "elbow", and flatten the flange surfaces with a stone, removing any tiny burrs hindering a good seal to the cylinder head. Then very very carefully aligned the thermostat and gasket, with a tiny bit of Permatex sealant esp for water pumps, and snugged it down. did the same for the small part above the water pump. I also wire brushed the slightly corroded surface of the inlet for a better hose/clamp seal. All good, but later had a tiny leak at the small part on top of the water pump, and needed to slightly snug the bolts a tiny bit.

In summary, I suggest stoning all metal meeting surfaces, to reduce gasket sealing problems. Also, using a different hose clamp style, Pegasus Auto racing has full circumstance wider clamps. A simple problem but vexing to fix. Hal

After your mating surfaces are flat (hose connections as well) use Form-a-Gasket Type 3 Aviation from Permatex. The brown tacky stuff that gets on everything. It's readily available.