<VV> no compression

[Duane, Jim (US SSA)]

Hi Daniel.

	What happened to me is the adjustment nut lost it's ability to
stay where it was put!  It walked up the stud and the valve closed shut.
Didn't take long to happen either!  Eye the top of the valves to make
sure they are the same height...  If everything else looks good, no
valve seat movement, no bent pushrod, no collapsed lifter, then it's a
likely suspect.
As for white smoke, generally that's gas, but could be oil.  I'd get the
compression fixed and see if the white smke goes away...
Good luck!



Jim Duane
'66 180 Corsa CVT
Colonial Corvairs
CORSA

 

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Daniel Stamm
Sent: Friday, March 31, 2006 2:33 PM
To: virtualvairs at corvair.org
Subject: <VV> no compression

Hey gang,
I have a 61 Monza 4 door.  The engine was not running well and there was
a lot of white colored smoke coming out of the exhaust.  I did a
compression check an found no compression on cylinder #5.

I pulled the valve cover and found that the rocker arm for the intake of
#5 had come loose. I re-attached the rocker arm and found that there
still was no compresssion on cylinder #5.

I then pulled the head.  The top of the piston looked good.  The sides
of the cylinder looked smooth and were not scored.

I removed the valves.  The valve seats looked smooth and shiny.  The
intake valve was smooth and shiny. 
The exaust valve was black but not scored.

Here are my questions for suggestions.

#1.  If there was a broken ring, would the cylinder be scored.  I have
not pulled the piston and cylinder and would prefer not to if the
problem was in the head.

#2.  If the car was driven for a period of time with the intake valve
shut due to the rocker arm being off, would that cause the head gasket
to fail?  (the gasket looks the same as the other  cylinders.)

#3.  Would any of this caused the white smoke, or is there another
problem?

I appreciate any suggestions as to what to pursue.  I am going to have a
machine shop look at the valves and valve seats on Monday

Thanks for the help.
Daniel Stamm

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