Ahhhh, the one that knows what they are doing. I kind of trust them.

At least shade tree mechanics are usually somewhat conscientious. This "mechanic" has a long way to go to get there.

Please Help.. So yesterday I had to go to my son'* new rents to help him move. After the first 50km or so I checked the coolant level and it was fine then another 60km to his home. I helped him move and during the whole time I had started and stopped the car about 4 times. I was at his place for just over an hour an then was heading home.. the car didn't start but just a click as before. I called the mechanic and he asked about the starter fuse and it was burnt . He asked me to bypass the fuse by using a piece of wire and it did not start but the wire got quite hot. I checked the coolant and it was low. My car is now sitting at my sons rental place 110 km away in another town closer to where my mechanic lives.

If these are the same mechanic I advise finding another. That was a very careless thing for him to have you do.

If the cylinder head is good..From where else can coolant go or make into combustion chamber. Oil was not milky.

could coolant get into the engine through intake manifold. If so, why would coolant be going through intake manifold.

If you are getting water in the cylinder there'* only two possibilities. Either through the head including the gasket or if the block has a crack at the water jacket. The block is rare while the head is common.
I was just reminded of a guy who had water being sucked into the intake due to an accident where they fixed it themselves and they created a small valley where anytime it rained and you were driving it would pool and get sucked in.

I bought GM fresh head gasket and matching bolts . The head gasket is suppose to be torqued 22 lbs and then 155 degrees . I saw the mechanic do the torque but didn't see if he had the wrench set for 22 but I assume he got that right. Then I saw him do the 160 degrees (he decided to do 5 more). I don't know why the first 50km highway miles I drove, no coolant was lost and in fact it was a bit more in the reservoir and I thought that was due to temperature change compared to when cold. Why did I lose so much coolant in the second half of the trip (mixed highway and city) . The first half of the trip was at outside temperature of about 8 degrees celcius while the second haft was at about 5 degrees. Could the oil lubriction of head bolts allow them to come loose with the temperature change and vibration then there was gasket leak in the second half of my trip or is this unlikely. The fuse to starter also burnt out.
If I take spark plugs out and replace fuse, Should I be able to turn the engine with the starter. If fuse burns out then the problem might not be mechanical but electrical ?

Thanks

TTY bolts are to be torqued with nothing on the threads at all.
Starter should be fine to turn it over with the plugs out.
If it don't crank we can bypass the relay.
Let us know what you get.

He has already oiled and torqued. My question is whether the bolts might loosen because they were oiled or is this unlikely