Zero Compression 164

["Kheraz, Abe" <abe.kheraz@xxxxxxxxxxxxxxx>]

There has to be more to the story than what it was revealed.  Zero
compression can happen if one or more of the following conditions occur:
1.	Bent valves (the most likely) or no valves at all (n/a in this case)
2.	Blown head gasket on all cylinders (not likely on all of them at the
same time)
3.	Holes in pistons (not likely)
4.	Missing or broken rings.  Even in this case some compression will be
present.
5.	Wrong cam timing, both valves on all cylinders are open in the
compression cycle (possible if belt slipped on both cam)
6.	And may be other remote conditions that I can not think of right
now.  But those are the obvious.

How the inspection of valves was done with out removing the heads or at
least the valve covers?  One can remove the valve covers and measure the
valve clearance on all valves.  Excessive clearance indicates bent valves.
I would highly recommend doing this before removing the heads.  Also check
if the timing marks on the crank pulley and cams are aligned.

Was the car towed/flat bedded after it stalled?  Did the car backfire
through the intake plenum at some time after it stalled?  Is the engine
moving freely now?

I think what happened (and this is only a guess); was that the car was moved
while in gear in the opposite travel (forward while in reverse gear or in
reverse while in forward gear).  Timing belt slipped and valves were bent.
This could happen even if the car is automatic at speeds above 35MPH.

Please report back on your findings.

Later

Abe Kheraz
88 Milano/Gold
Madison, WI
(608) 266-1335

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