I did a compression test a year ago and all valves were 120+ PSI and within 20 psi of each other, but not since the oil in the radiator issue. Have not done a leak down test. That is probably the next step. But I just discovered this Friday so I'll have to take it to he mechanic Monday.
If testing does show a head gaske/head issue I was going to try one of the chemical gasket sealers that work internally like Thermgasket. I've heard those can work if the issue is minor (not a warped/cracked head).
Any experience with those type sealers or recommendations on a good one?
If that doesnt work I may do the work myself and work on the head gasket if the head isn't warped or cracked. If the head is damaged and will need replacement I may replace the engine with a 5vz-fe. I've heard they match up pretty well with the 3vze as far as mounts and repurposing other parts.
Here's an old thread that gives the broad strokes of the swap.
How's the power from the 3.4L engine in your Tacoma? Anything would be an improvement over the v-slow 3vze.