I posted this on the GX470 board but they suggested I also post it here because of the deeper knowledge base of the 2uzfe motor...
Okay, so my mechanic friend was helping me with my 2006 GX470 (190k mi). We agreed that he would do the CV axles and that was fine. I needed the water pump (leaking a lot) and timing belt (way past due) changed. He suggested that we tear it down to the head gasket and get the heads cleaned up. I agreed and now I am wishing I hadn't. We ran into one issue after another with wrong sized hardware, the machine shop losing a piece and a number of other minor setbacks. Well, he finally gets it together and fires it up for the first time and it is misfiring a ton. He did a compression test and the right side all was nice and strong (160+/-). The left side however, 0, 0, 30 and 120. Brand new head gasket torqued down to factory specs. The head was pressure tested and the valve seats were done and everything was cleaned up. I am at a loss as to what the issue might be. I am adding pictures of the timing belt and want to know if that looks right. I really don't want to rebuild the head if I can afford it. I suppose it could be burnt valves, but I would have thought the machine shop would have caught that.
Please take a look at these pictures and let me know if you think the timing is off. I suspect that if it is, the valves may have been bent but it seems odd that it would only do that on one side. Any ideas would be appreciated as I really want my truck back!
Okay, so my mechanic friend was helping me with my 2006 GX470 (190k mi). We agreed that he would do the CV axles and that was fine. I needed the water pump (leaking a lot) and timing belt (way past due) changed. He suggested that we tear it down to the head gasket and get the heads cleaned up. I agreed and now I am wishing I hadn't. We ran into one issue after another with wrong sized hardware, the machine shop losing a piece and a number of other minor setbacks. Well, he finally gets it together and fires it up for the first time and it is misfiring a ton. He did a compression test and the right side all was nice and strong (160+/-). The left side however, 0, 0, 30 and 120. Brand new head gasket torqued down to factory specs. The head was pressure tested and the valve seats were done and everything was cleaned up. I am at a loss as to what the issue might be. I am adding pictures of the timing belt and want to know if that looks right. I really don't want to rebuild the head if I can afford it. I suppose it could be burnt valves, but I would have thought the machine shop would have caught that.
Please take a look at these pictures and let me know if you think the timing is off. I suspect that if it is, the valves may have been bent but it seems odd that it would only do that on one side. Any ideas would be appreciated as I really want my truck back!
