It has been a while since I have been on here, but only because the issues with the car have stopped until now.
Two days ago I drove about 2 miles to Walmart for food and noticed that after I parked my 91' 740 the temperature gauge was almost in the red. I killed the engine and opened the hood and steam just started to come out in between the engine and the firewall. Bought two gallons of water and poured it in the expansion tank and noticed after the first gallon that water was leaking out somewhere in between the engine and firewall (or maybe around the front of the transmission). I managed to drive it back on operating temperature with some water to spare in the tank. It all leaked out in the driveway eventually.
So my dad having thought that it was the head gasket bought some temporary "seals it all" liquid (only because I don't make a lot of money I will have to wait about another week buying the gasket kit). Read the instructions and poured it in the tank with some water to find that it worked... until after I test drove it around the block twice, about a mile total, and found that it was leaking again. I even parked in another place in the driveway just to see if there was any water leaking out. So I had a theory, some of the stuff was still on the bottom of the tank, and thinking of putting the engine at about 1000-1500 rpm would help the water and the miracle sealant get to the leak and stop it while adding more water.
That didn't work and am now back at square one with a leak and no way to stop it and I don't think that it could be the head gasket at all or by itself (what else, I don't know).
What I saw wile filling the tank at Walmart were bubbles, but the engine was not running. Today trying the "miracle sealant" were bubbles while the engine was idle. This would all point to the head gasket, but I am skeptical about it being the only problem. Any ideas?

Edit: Sorry for the wall of text.

 

leakage between the engine and firewall is usually a heater hose or heater valve. easy to fix.

i'd not use that "miracle sealant", it tends to gum things up.

 

Found the problem, it's the heater hose and not the gasket... at least not yet anyways. Any tips for replacing those?

 

Dumping sealants in is not a good way to go--at best they can work on tiny leaks, not massive coolant loss. How could a sealant stop gushing liquid? I mean, think about it!

You may still have a blown HG. Replace the hose and see how it goes from there. make sure you don't have an air pocket after doing the hose.

No special tricks for the hose: clamps, old hose out, new hose on.

BTW, I use sealant such as Blue Devil for HG repairs when the situation doesn't warrant doing the job right. The Blue Devil is good stuff!

 

So, got the new hoses, just need to remember if the hose from the engine goes on the top or the bottom.

 

both heater hoses go to the engine

top hose goes to the back of the head, bottom hose goes to the pipe that comes off the water pump.

 

Thanks.