Re: 1988 Toyota P/U sprays oil
Valve adjustment could cause low compression if the valve weren't allowed to close all the way. A burned valve could do the same thing. I have seen a few 22r's with burned exhaust valves. I have never seen a Toyota engine with cylinder bores out of round, but anything is possible. Sounds like this motor has something serious wrong in there. Why is there enough oil in the top end for it to be shooting out the PCV tube? I remeber in one I had there was a plate or something on the inside of the valve cover that covered the hole for the pcv valve so that oil wouldn't slung up on the pcv. I would pull the valve cover, check the valve lash and check that oil can freely flow back down to the oil pan. <br /><br />Based on yor first post about this problem, I checked the Toyota factory service manual. According to the manual you have a piston ring worn or damaged, Valve stem guide worn, or a valve stem seal worn. Of the three I am fairly confident that your problem is in a piston ring.<br /><br />Here is how I would solve this problem if I intended to keep the truck (which I have done because I keep my Toyota 4X4's for ever). Pull the engine, punch it .020 over, use genuine Toyota pistons and rings. This is critical for the longevity of the motor! Take the head with the block to the machine shop and have them shave it, and not to worry about cutting as much as 10 or 15 thousanths off it. Then for the reassembly I would buy a Toyota RV cam shaft for it, and a ceramic coated header. Also, have the valves ground three angles and have the valve seats lapped.<br /><br />I am curious, is the truck a 4X4? Extended cab? For sale?
