testing for coolant leak down super major

OK Guys need some help. I installed all new sleeves and orings , sleeve protrusion at 0.003. Installed head with new coolant rubber gromett and new composite type head gasket plugged off all coolant orifices. I installed pressure gauge and screw in tire valve. I dumped in about a gallon of water and charged coolant system with about 13 psi air pressure. as you might be able to see from pictures i have leakage externally mostly at front above water pump , and all along under intake and exhaust openings. I only conducted this test because I was worried about top liner seals when i installed sleeves they all shoved in by hand with lube , they are just so small i didn't trust them. I guess my question is do you think this is sign of sleeve seal leak, is head gasket the culprit. takes about 3 hours for pressure gauge to move from 13 psi to 10 psi. I torqued head bolts in correct order up to 90 ft lbs. Valve job professionally done and head skimmed. Absolutely no water leaking into cylinders or internally I left oil pan off for this test. I used soap and water mix to create bubbles to see this leakage. Thank you for your help.

Leaking there is nothing to do with liner seals and with a gallon of water you will hardly cover the bottom of the liners let alone get water up to the head gasket.

At 13 psi you are about double what the radiator cap allows the system to build up.

I would suspect the head gasket if you are certain you have enough water to fill the block but, if your test is holding that sort of pressure it does not seem a bad leak, You say you have torqued the head down but have you had the tractor running and warmed up before torqueing it down a second time?

Saying that, head gasket would be my first port of call. I would also check all the head bolt holes in the block to make sure the bolts are not bottoming out when you torque them down. I would also use a none setting blue gasket sealer on the next head gasket, you will need another if you take the head off.

Thank you very much Major Man. I did mispeak on amount of water, I had over 1 and a half gallons full all the way to top of thermostat housing. I conducted my test again today and only saw minimal leakage very few bubbles it also held 10 psi all day, still no leaks of water into cylinders or crankcase. I was mostly worried about top sleeve seals, I will reassemble engine and retorque head after good heat up.