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Topic: How to read a Compression Tester

in Forum: C3 Engines


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How to read a Compression Tester

Posted: 1/16/06 8:41pm Message 11 of 16
2 cruzn
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.

Is it burning or leaking...

How about valve stem seals, if it's only burning a little... that is a pretty easy fix. Have they ever been replaced?

No compression  can also be a head gasket...




Lifetime Member #86

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How to read a Compression Tester

Posted: 1/17/06 5:20am Message 12 of 16
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JimG
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Gloucester, VA - USA
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Vette(s): 1979 T-Top, Metallic Green ZZ4 350/355 hp 405 ft/lbs torque Dual Spal Fans 700R4 4 Spd O/D Transmission 2004 Z06 Commemorative Edition

 

 So the results are in:

 1 - 150

 2 - 150

 3 - 150

 4 - 148

 5 - 150

 6 - 147

 7 - 150

 8 - 150

 Guess I'm stuck with this engine for a while... Using Joel's numbers the engine is still good. So now gotta figure out what's not set up right.




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The Money Pit.... and my niece

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How to read a Compression Tester

Posted: 1/17/06 5:55am Message 13 of 16
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Adams' Apple
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Comp. looks good all the way, Jim. If it don't seem like it's got any power, I'd have to look elsewhere, possibly timing, or fuel, or ign.


Joel Adams
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How to read a Compression Tester

Posted: 1/17/06 12:38pm Message 14 of 16
2 cruzn
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.

[QUOTE=Adams' Apple]Comp. looks good all the way, Jim. If it don't seem like it's got any power, I'd have to look elsewhere, possibly timing, or fuel, or ign. [/QUOTE]

Doesn't get much better than that... .

Didn't you say you were having carb (Holley) problems ??? last week.

Could still be that...




Lifetime Member #86

USN 1966-1970
WestPac 67-68 Tet I&II

Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"



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How to read a Compression Tester

Posted: 1/17/06 1:28pm Message 15 of 16
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JimG
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Gloucester, VA - USA
Joined: 1/29/2005
Posts: 1453
Vette(s): 1979 T-Top, Metallic Green ZZ4 350/355 hp 405 ft/lbs torque Dual Spal Fans 700R4 4 Spd O/D Transmission 2004 Z06 Commemorative Edition
Yeah...still trying to figure it out!


Lifetime Member #73

The Money Pit.... and my niece

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How to read a Compression Tester

Posted: 1/18/06 9:13am Message 16 of 16
2 cruzn
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.

[QUOTE=JimG]Yeah...still trying to figure it out![/QUOTE]

As Joel said.. sounds like could be fuel or any combination of things. I had a piece of carbon get stuck between a sparkplug electrode once... drove me crazy trying to find the problem...




Lifetime Member #86

USN 1966-1970
WestPac 67-68 Tet I&II

Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"



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in Forum: C3 Engines


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