Well have I got a story...
New converter in, hitch up (12k toyhauler) take off. All the sudden in town its starts stalling as you come to a stop like its locked up. Then you go to take off and it locks the converter as soon as you get above idle. Come back home, yank valve body nothing can be seen in the boost valve, switch valve etc. Found the boost valve spring flat so find a similar spring no difference. Finally pull OD sol and find a bunch of stuff covering the screens. Clean out boom its normal again.
Hit the road- here's the point where I discover were I went "FULL" retard....
Line blows off the intercooler coolant side. I didn't think about putting a pressure relief tank on the intercooler coolant - closed system = boom.
No way to patch it had to drive sans intercooler. Egts hated me, coolant temps hated me, not a good time. Eventually I had to pull a hill and I didn't have the heater on (hot af)... 251deg and 1540 EGT (for about 10 sec)...
It pukes out, we refill. Now we start hearing a KNOCK...sounds like valve train. No choice but to drive it. Doesn't get worse but never goes away.
Find the local shop, turn off cylinder 6 noise reduces. Swap injector holes 3-6 sound stays with #6 (my fav). Leave my trailer 10hrs from home to limp it home. We're thinking worse cases - rod bearing, cam lobe, piston. Pull pan (no fun), bearings good. Cam looks fine. Piston is tight in the bore (no white smoke or signs of dead hole either). Check valve train- #6 push rod is straight (can't pull without motor pull). But #6 exhaust rocker is LOOSE like 0.039 fits and 0.045 doesn't. Adjuster looks like it backed out a hair.
SO now its getting dual core alum radiator, 180 tstat, etc. We cobbled together a pressure relief tank at NAPA while we were diag the rattle. It seems like the IC is working well.