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How to read a Compression Tester

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How to read a Compression Tester

Posted: 1/16/06 8:41pmMessage 11 of 16
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1024
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...

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How to read a Compression Tester

Posted: 1/17/06 5:20amMessage 12 of 16
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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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How to read a Compression Tester

Posted: 1/17/06 5:55amMessage 13 of 16
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Duncanville, TX - USA
Joined: 11/8/2003
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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.

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How to read a Compression Tester

Posted: 1/17/06 12:38pmMessage 14 of 16
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1024
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"
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How to read a Compression Tester

Posted: 1/17/06 1:28pmMessage 15 of 16
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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
Yeah...still trying to figure it out!

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How to read a Compression Tester

Posted: 1/18/06 9:13amMessage 16 of 16
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1024
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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