LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

results of compression test

Old May 3, 2008 | 06:29 PM
  #1  
rock1501's Avatar
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From: ajax ontario canada
results of compression test

after storing the car for the winter I noticed the oil was a bit milky.I was thinking it was due to condensation over the winter.I changed the plugs today and thought I would do a compression test just to make sure while the plugs were out.
results are
#1=160 psi
#2=160psi
#3=160psi
#4=160psi
#5=160psi
#6=160psi
#7=160psi
#8=150psi
all were done with 6 compression cycles
should I be woried about #8 maybe head gasket leaking maybe?or nothing?
I would like some opinions

motor has 7 passes on it and 13 dyno pulls(no street miles)

thanks guys

Last edited by rock1501; May 3, 2008 at 06:42 PM.
Old May 3, 2008 | 10:09 PM
  #2  
mdacton's Avatar
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From: Goochland, Va.
I would not worry about it.

a leak down test will tell you alot more than cranking compression will.

But I think your fine, and you probly have a milkshake b/c of condensation. I see it on stuff if it sits a while
Old May 4, 2008 | 06:56 PM
  #3  
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From: Waterloo, Ontario
Keep an eye on the plug in cyl#8. See if it goes really white indicating burning antifreeze.
Old May 4, 2008 | 10:42 PM
  #4  
rock1501's Avatar
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From: ajax ontario canada
Originally Posted by 96flame
Keep an eye on the plug in cyl#8. See if it goes really white indicating burning antifreeze.
all the plugs I removed looked a bit on the rich side if anything
none had even a hint of white but I will keep an eye on that plug for sure
Old May 4, 2008 | 11:38 PM
  #5  
blk95's Avatar
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Probably fine, I recon used cars for a living and almost every car, any make, has white stuff under the oil cap when I get it from sitting or very few miles
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