disconnect battery, fuel lines, and harness from upper engine. disconnect the exhaust flange nuts to remove exuast pipe from manifold remove any and all brackets attached to head that will prevent it from coming apart from the engine. remove valve cover and remove rocker arms and push rods. remove head bolts and separate from engine. The head is heavy especially with the intake and exhaust manifold bolted to it. I would recommend bolting a chain to the front and back of head and use a cherry picker to get it out or if u dont a cherry picker have someone help you cause it is pretty heavy.
If you need to ask this question on this web site, you shouldn't even attempt to replace the head gasket. You'll need to pull apart the top part of the engine, so just the cylinder head is there. remove the gasket thouroughly then use the torque specs listed here to fasten everything back together. http://www.quad4forums.com/forums/techdata.php
The gasket is between the head and the manifold and simply remove the bolts and replace the gasket after cleaning it real good.
Replacing the head gasket on any vehicle is a long and complicated process, however if you wish to see basic step-by-step instructions go to the related question on the right side of the page "How do you replace a head gasket?"
This is a major repair and requires a skilled mechanic. You have to take the head off. and replace the gasket and get it put back on properly. Unfortunately, something made the gasket blow and once you get the engine apart you will likely see that the rings and pistons are worn and the valves need regrinding , etc, etc. I do not know about the Astro Van, but you may have to take the engine. If so, this is a major job , requiring some kind of hoist, in itself, as is putting it back in. You might do better by selling the car for parts.
The thermostat should be located underneath the top hose coming off of your radiator. Remove the 2 bolts holding it onto the top of the engine and the thermostat will be sitting smiling at you. Pull it out with your two fingers, clean up the old gasket with a razor (don't etch the metal), replace the new gasket that came with the replacement part, and reverse removal order mentioned above.
undo the motor mounts and loosen the tranny mount lift the engine upwards slowly and carefully. remove pan bolts and old gasket.do revers for install .toque to corret specs.
Head Gasket itself is the same from 1987-1996 so it doesn't matter. Just got gasket set for the truck.
To repair the head gasket on a 1987 Ford Bronco, the head and the old gasket must be removed. Purchase a new head gasket and carefully install it according to manufacturer specifications.
Symptoms will be: Loss of coolant with no apparent leak. Overheating. White smoke from the exhaust. Oil level over full. Foamy substance on the underside of oil cap, & dipstick. Air bubbles escaping from radiator with engine running cap off. Miss on one or more cylinders. If you do have a blown head gasket, STOP running the engine immediately as serious engine damage will occur. Replace both gaskets not just the one that is blown.
You have to remove the instrument cluster to service the light bulbs.
Please re-ask your question; this is far to general to answer; oil can leak (like sic) out of many different places. Try degreasing your engine first and tighten up all of the bolts on the valve cover, oil pan, front cover, etc. Run the engine and look all around it with a bright light. Replace the gasket that's leaking, ensure as gasket surfaces are clean. Good luck Malcolm
Probably located at the engine end of the upper radiator hose in a removable housing Drain about 1 gallon of coolant from the radiator Remove housing at end of radiator hose Make note how thermostat is installed Clean both surfaces Replace thermostat and gasket Re-fill coolant slowly to prevent an "airlock" Start engine and look for leaks Run engine to normal operating temperature with heater on Re-check coolant level
The head gasket may be leaking. Try having it changed.