Correct it was originally jet washed and then it was bead blasted... cause jet washing didn’t clean it up enough. I used some compressed air and blew out up into the baffles from the bottom and then down through the top holes, some dust came out but nothing else, I know the powder coating shop I went too has done a bunch of valve covers before so maybe they did something to prevent any beads got into the baffles?Was the valve cover media-blasted? If so make damn sure all the media is gone. Especially inside the baffle.
Ok awesome! Thanks for the tip appreciate it! I’ll give the cover a dunk and then use my pressure washer to rise out inside of the baffle to the best of my ability!The dust from blasting gets in everything and is abrasive. I'd flood it with hot soapy water and pressure-rinse it. That baffle will have trapped that stuff.
The end play of the camshaft is built into the head and camshafts. The front journals set the end play and control movement of the camshafts forward and aft, it is not adjustable. Either your old head front journals were worn out of spec on the thrust areas or the camshafts are worn out of spec on the thrust areas, or both are worn. You'll need to measure end play once you have the new head. Unfortunately replacement of the camshafts is the only solution once you have replaced the head if it is still out of spec with the new head.
Man thats crazy! Im going to measure the camshafts for spec Via instructions from the FSM and ill get back to you! Thanks!Roughly... A piece of aluminum at a length of aprox 30 inches, with a temperature rise of about 90-95 degrees C, it is possible the head expanded enough to contact the camshaft. A rough calculation based on the expansion of pure aluminum says that it could have grown in length by as much as 0.067", but I'm sure the alloy Toyota uses is more stable than that. In any case, the camshaft would not expand nearly as much as the head since it is made out of steel. I'm curious if anyone else has seen this on an overheated 1FZ?
Cheers, I do have the 1997 FSM hardcopy but it is in the truck and the garage I am using, So ill have to take a look at it later.Standard thrust clearance is 0.030 - 0.080 mm. Maximum is 0.10 mm. This is usually checked by placing a dial indicator on the end of the shaft and moving it fore/aft to see how much the needle moves. If you are using the commonly available online '96 FSM, both the spec and the procedure are on page EM-46.
Were you able to order the exhaust valves? What's the ETA on your new head?