00 Disco II was overheating, now little compression, heads, valves, rings, pistons?
Our 2000 Discovery II (124K) started overheating last year. I pressure pumped all antifreeze lines, nada. Replaced the thermostat. Drove fine for about 3 weeks the overheated. I just parked it. About 4 or 5 months later my son started it up and let it run...1/2 hr later, no overheating. After a few times of doing this, we took it up the mountain to get some boulders for me to build a fountain. Ran fine, on the way home it went red again. WTH? My other son took it to the dump, was fine, then BAM..Wouldn't run right. I went and got it later, was running HORRID, no compression on several cylinders, drove it home and parked it. Only time I ever blew a head gasket, I was on the freeway and saw a white puff of smoke, lost all compression, it rained antifreeze and wouldn’t start again, till I fixed it. This still starts, would run if I allowed it to, crappy…Compression test on left side was between 90-100. Left front, (#1?) was 42. No. 3 had 0 compression. This was done by taking the plug out, putting the gauge in and cranking 3-5 times. My older son drove up and said all the plugs had to be out to test it. Is that true? I don’t have a lot of money, but need it running. Should I replace the head gasket and have the heads machined? How to I tell if the valves, rings, and pistons are ok?

Compression tests: Dry: 1-120, 3-0, 5-120, 7-120, 2-90, 4-110, 6-115, 8-110
Wet:1-90, 3-0, 5-90, 7-70, 2-90, 4-100, 6-115, 8-100
Scratch on #3 piston? One valve looks "stuck". Why does it look like too much oil on heads towards the firewall? OH MAN IS THIS A PROBLEM.
Photos are on photobucket. http://s369.photobucket.com/albums/o...Pistons%20WAA/

Anybody out there? Mike???

Thanks a TRILLION!!

 

Pull the heads off, send them to a machine shop and see what they say. May want to check the block for cracks also.
What does Bam mean/sound like?