Now it looks like the truck won't be finished until Saturday.
No, I had no overheating issues with the truck. She runs cool as a cucumber.
What I did do was load the piss out of the truck with kids and gear and fishing tackle, then drive it too fast in the mountains of WV. I got some detonation pulling up one of the hills on the WV turnpike. The next fuel stop I bumped the octane up and it seemed to solve the problem. We drove on to Florida.
The head is fresh on this truck, only 15K on it. Oversized s/s exhaust valves, hi-po valve springs and the head got decked just enough to make if flat. Compression is higher than stock, but not by much.
Saturday afternoon when we were leaving it was hot out, 80 plus degrees, big load of family and gear, pulling up a long grade at about 2500 rpm. I'm running 33's with 3:73's, so speed isn't a problem here in Central Ohio where it's flat, but I do lose some gearing in the hills. I'm guessing speed with the big load was the killer. I'm betting the detonation in WV caused the initial damage, and the gasket deteriorated over the remainder of the trip. We drove around all week unloaded and had no issues, but the truck did seem like it was down on power a bit. Not enough for me to really suspect anything, I just thought it was hot out. A/C compressor leaks so we had the windows down in FL.
We will certainly be more careful pulling hills go forward. I have coached the wife to take the big grades slower in third gear which should help the situation on the way home. She will be much lighter without my wide ass and the kids and our luggage. We will also bump octane on the fuel when the truck is loaded down and climbing in the mountains. I will probably install the 4:11 gears I have in my shop and learn to drive slower on the interstate. I also hope to pop for a new H55F tranny to take advantage of that O.D. fifth gear while keeping good gearing down low with the 4:11's.
I used to drive a VW bus a lot, and I learned that the bus was slow, but the road was patient. Take your time and enjoy the ride. I need to get back to that a bit and drive the vehicle as it was intended.
We all know these vehicles were designed to run 55 mph. It's hard sometimes to show the restraint and cruise at 65 or slower when everyone around you is going 80. I know the failure between 3 & 4 is somewhat common, so if anyone else has had this happen to them I'd like to hear what they think caused it.
Thanks,
Brett