Attention: TDR Forum Junkies I would appreciate some suggestion on how to proceed. Here's my situation 
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Earlier today, I kept noticing an antifreeze smell (engine temp, transmission temp, EGT temps were all good and truck sounded normal). I stopped at a 7-11, I did a visual check. No coolant leaking on the ground, nothing on the engine, no wet carpet near the heater core but also no coolant in the radiator overflow tank. Not sure when I last notice the radiator overflow tank but I think is was at the full make less then a week ago. Decided to head for home about 8 mi away. Heading home, still no problems then noticed a slight increase in engine temp to 150 (truck normally runs really cold; was going to replace the thermostat this week). About 1 1/2 mi from home engine temp is at 180 then less then 1 mi from home I noticed the engine temp moved to 190 and decided I didn't want to wait through the light for the left turn arrow and when straight ahead instead the engine temp gauge started moving up rapidly and by the time I got on the shoulder it was almost at 230 deg. I shutdown the truck but turned on the heater to help dump some of the heat and called wife for some water. While I waited I looked again for leaks and couldn't find any. I checked the oil level (should have done it earlier) and it was way way high. Oil had no diesel or antifreeze smell, was black but pretty thin (I'm running Amsoil). The oil has about 9000 mi on it and I had put some oil in the truck about a week ago and at that time it was about 1/8 in below the top of the safe zone. However, today the fluid level on the dip stick (I don't want to call it oil since I suspect thats where the coolant went) was probably 12 INCHs
higher on the dipstick then the safe zone. How the truck didn't overheat (more then maybe 30 sec at 230) or hydrolock is beyond me but I'm sure glad it didn't.
Got the truck home in the driveway later and obviously, I need to drain the fluid from the oil pan and check for water/coolant. I'm suspecting either a blown headgasket, cracked head, or cracked block but short of a complete teardown in the driveway don't know of a good way to check any of those.
The truck has 190K and I've never seen the EGT go over 1200 or the engine temp go over 180 before (transmission temp never got above 140). Boostwise I've only got on it enough to hit 32 psi a couple of times. I have noticed the engine RPM has dropped about 300rpm (when idling in drive at a stop) over the last month (started dieing when backing out of parking slots) or so and last weekend, it seems to be a little sluggish when accelerating in traffic from 40 or so up to 50 and maybe when starting out (but I may just be second guessing myself) otherwise it seem fine and when accelerating at 60 or so it was great.
I would appreciate any suggestions regarding other possible sources of the coolant leak or good methods to check for the blown gasket or cracked head/block.
. Earlier today, I kept noticing an antifreeze smell (engine temp, transmission temp, EGT temps were all good and truck sounded normal). I stopped at a 7-11, I did a visual check. No coolant leaking on the ground, nothing on the engine, no wet carpet near the heater core but also no coolant in the radiator overflow tank. Not sure when I last notice the radiator overflow tank but I think is was at the full make less then a week ago. Decided to head for home about 8 mi away. Heading home, still no problems then noticed a slight increase in engine temp to 150 (truck normally runs really cold; was going to replace the thermostat this week). About 1 1/2 mi from home engine temp is at 180 then less then 1 mi from home I noticed the engine temp moved to 190 and decided I didn't want to wait through the light for the left turn arrow and when straight ahead instead the engine temp gauge started moving up rapidly and by the time I got on the shoulder it was almost at 230 deg. I shutdown the truck but turned on the heater to help dump some of the heat and called wife for some water. While I waited I looked again for leaks and couldn't find any. I checked the oil level (should have done it earlier) and it was way way high. Oil had no diesel or antifreeze smell, was black but pretty thin (I'm running Amsoil). The oil has about 9000 mi on it and I had put some oil in the truck about a week ago and at that time it was about 1/8 in below the top of the safe zone. However, today the fluid level on the dip stick (I don't want to call it oil since I suspect thats where the coolant went) was probably 12 INCHs
higher on the dipstick then the safe zone. How the truck didn't overheat (more then maybe 30 sec at 230) or hydrolock is beyond me but I'm sure glad it didn't. Got the truck home in the driveway later and obviously, I need to drain the fluid from the oil pan and check for water/coolant. I'm suspecting either a blown headgasket, cracked head, or cracked block but short of a complete teardown in the driveway don't know of a good way to check any of those.
The truck has 190K and I've never seen the EGT go over 1200 or the engine temp go over 180 before (transmission temp never got above 140). Boostwise I've only got on it enough to hit 32 psi a couple of times. I have noticed the engine RPM has dropped about 300rpm (when idling in drive at a stop) over the last month (started dieing when backing out of parking slots) or so and last weekend, it seems to be a little sluggish when accelerating in traffic from 40 or so up to 50 and maybe when starting out (but I may just be second guessing myself) otherwise it seem fine and when accelerating at 60 or so it was great.
I would appreciate any suggestions regarding other possible sources of the coolant leak or good methods to check for the blown gasket or cracked head/block.
. 
