So, I haven't posted anything on this thread in a while.
Back around May my head finally gave up the ghost and I had far too many projects to deal with over the summer to get into this.
Last Tuesday after work I pulled the Cruiser into the shop and tore it down to see what I might find.
I am cracked in 3 of the 4 cylinders. And, I suspect, it had been cracked as long as I have had the truck. The erosion in the head does not correspond to the amount I have ran the engine, so I suspect it had started to crack before I even had it in the country and all my mods to keep the truck cool had prolonged the head a little longer than if I had been running stock. I had lingering doubts about the head all along, but it hadn't catastrophically failed, so was being very hard to pinpoint with any degree of certainty.
When it finally went in the spring I suspect it was due to a faulty Tridon Tstat. It ran up to 220F right down the road from my house and it had never broken 200F prior to that, I caught it quickly as my Madman gauge has warnings set on it at 205F. However testing my tstat led me to discover it was barely opening. And, because I took my sender out of the filler neck and put it inline in the hose so I could keep my factory gauge operational, it likely got hotter than that before the Madman was able to sense the temps and light up a warning.
I have spent all summer going back and forth about which way I was going to go with repair. I was pretty much set on putting a 1UZFE in it. After talking with several members and various others about the swap, I knew I would be happy with the end result. I was just reluctant to get into a motor swap with some other projects I have ongoing. It's pretty easy and straightforward as far as motor swaps go, but I knew it would take me much longer to get it wrapped up to my satisfaction. So, this week me and
@GTSSportCoupe have talked quite a lot about various options and ways to go with it and I have decided to repair it and get the truck back on the road. Besides waiting on parts and and and other things I will do while I am in there, it's basically 1 more day of work as opposed to weeks of fabbing and wiring to get the 1UZ dialed in and looking factory.
I am taking this opportunity while I wait for parts to run all the misc pieces through the blasting cabinet and repainting them so everything looks good when I reassemble. I am going to have my injectors rebuilt while they are out.
After taking everything apart and inspecting the cylinders, they are actually in outstanding condition. #4 does have corrosion in the top ,but fortunately its all above the ring lands, so I should have no compression issues. #4 always had slightly low compression, but after disassembly it's because the seat of the exhaust valve has some corrosion on it, so it was never sealing correctly. Fortunately I have never had any water make it past the rings, so no water in the bottom end like a lot of poeple find. I am actually surprised I have never found any moisture in the bottom end.
I haven't done anything yet except start repainting parts, but I will keep the pictures coming as I get parts in.