i have my spare motor stripped down with heads off, before i pulled it down it ran like it was on 4 cylinders or less because the timing belt slipped i realigned the belt and all the timing and it still ran like crap is there a way to tell if the valves are bent while the heads are off? they look like they seal good but im probably wrong also how do i go about getting the valves out?
do a youtube search on removing valves. there is a few on there. you will get a better understanding rather than getting it explained.
Sit the head on blocks, do one cyl at a time, ensure the valves are closed, squirt some CRC,Penetrene, even fuel (but don't be smokin at the time)onto the valve and port, and watch for seepage past the valves (underneath, thats why it's up on blocks) If it leaks it's not sealing (bent or stuffed) no leaks, no problem Should have done a compression test before dissassembly, this is just a method for when you have not done the tests when you should have
thanks, i will try that way the mechanic didnt have a compression tester that would reach down, i had the other motor to put in but thought i might fix this one for a spare again
Turn the heads upside down with the cams removed and fill the chambers with petrol. See which ports it leaks out of.
best way to do this is to pull heads apart and roll the valves on a even flat surface and watch for run out. You'll know what I mean when you see the valve stem wobble. other way is to just leave the heads as is and spray some soapy water on the chambers...then blow compressed air from teh intake side and see if you have any leaks. you will have some leakage but if you are blowing severely then you have issues.
These are all great ideas but I am reconditioning one of my engines at this time. I did the leak checks prior to removing valves and they were all great no leakage at all. When I came to remove the valves, two of them were difficult to remove from the valve guides. these two valves had stems that were slightly bent towards the valve retainer ends and there was uneven wear on the stems. New valves and valve guides were the only answer here.
