Slant 6 Vibration

nm9stheham said

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- Bring each piston up near the top of the bore and alternately push on the left and right sides (looking from the front of the car); the piston should rock very slightly back and forth to when you do this. They all ought to rock back and forth about an equal amount...

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Bro, that is awesome. Ill have to try that but if I found that before reading this, I would have scrapped those in a heartbeat!

You can use a straightedge across the head to find any obvious warpage. Use a flashlight behind the straighedge and look at the light passing, its about an 8:1 magnifier (Iv had that stat in my head for years and finally used it! Don't know where I read it) you can also stick some sandpaper on a mirror (uber flat) and run it over the head in a figure 8 pattern and look for low spots. Autozone loans the 'OEM' valve spring compressor tool that allows you to pop the springs and valves. while you are there, order some $3 valve seals as yours a guaranteed toast or already in the pan. A machine shop will dress your valves (mine does it for a buck a piece if you bring them in) and can tell you if any exhausts are spongy and past facing. You can also ID any sunken seats while your in there. If you need a head ASAP, I got a pulled one down in Tustin.