well, pistons are out (pics later) and i cant see ANY evidnece of anything wrong, not obvious evidence anyway. rings look good, no cracks in the piston, no damage to the cylinder wall. each piston looks just like the other in everyway!

What gives? why did my #3 comp. hit the shitter? i hate to ask this question after the fact but: is it possible that to low of an oil viscosity could have done this buy mimiking the signs of a blown motor? my troubles began soon after i put in 5w20 synthetic.

well, let the hypothisizing begin...

tim

USED TO HAVE...Everything you wish you had, and then some...

You are somebody special Tim, you matter! - from the admins (but nobody likes you, because your username is just like that other guy's, and you whine a lot)

What about the valves? They can also cause compression issues.

I edited to the wiki!

Don't forget that a blown head gasket, or a warped head can cause low comp readings too...

How did you head gasket look?
Have you checked the head for distortion?

Lee.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Megasquirt powered 420A
Custom turbo system

http://www.ms-custom.com

Look at the valve seats and Like^^ said.
Did you do the oil leak down test? If so what were the results? If it failed the oil leak down test than it means head gasket or valves.

myspace.com/coastiecobb

Take the rings off of the piston. When we say cracked piston, the rings lands have hairline cracks in them, that can be hard to see. When you take the rings off the piston, that chunk that is cracked will usually fall right out..

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
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