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Registered
Join Date: Mar 2008
Location: Houston, TX
Posts: 77
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My compression test.
T1 T2
Cyl. 1--130-140 Cyl. 2--150-150 Cyl. 3--120-120 Cyl. 4--175-180 Cyl. 5--170-175 Cyl. 6--150-155 Cyl. 7--170-175 Cyl. 8--175-175 Ran two tests, 1st test regular, 2nd test with a few drops of oil.
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1984 Euro 928S 310HP Stock 
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12-26-2008, 02:03 PM
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RicerSchnitzzzle
Join Date: Jun 2008
Posts: 385
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Looks like some leakdown issues. All should be within 10% of the median amount. #1 and 3 are too low. Are you sure you had both valves closed with each test?
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'81 Euro 'S' 928 5-Speed 5.0L Hybrid "Ricerschnitzzzle" Wish list: RollBar, New Helmet and driving lessons  Wishes Done: Body kit, seats, No cat, Headers, X, Afterburners, 3" exhaust, short shifter , 17" TT Rims, 250HP N2O, MSD ignition w/retard+rev limit, MSD billet distributor, Accel Coil. 5.0L block, ported heads, JE race springs + .503 "S+" cams |
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12-26-2008, 03:59 PM
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Registered
Join Date: Mar 2008
Location: Houston, TX
Posts: 77
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I followed rhjames's directions to the T. At least I think this was the concept.
Unplug all spark plug wires, pull all spark plugs, screw compression device into first hole, then cycle the engine 8-9 rotations. I went from #8 to #1 then with the oil test #1 to #8.
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1984 Euro 928S 310HP Stock
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12-26-2008, 05:53 PM
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Registered
Join Date: Mar 2008
Location: Houston, TX
Posts: 77
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Russ, call me real quick.
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1984 Euro 928S 310HP Stock
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12-26-2008, 08:26 PM
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Heavy Metal Relocator
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it's my standard "old skol" compression test.
not a leakdown test. for that, you need a compressor and fittings and blah, blah........or one of those fancy leakdown testers.....  anyway, as I suggested, you can try the chemical remedies for the bad cylinders, or do what I just did and tear it out and strip it. you really have 4 that aren't getting it done--1, 2, 3, and 6. could be stuck rings as we discussed, or worse. We'll discuss that tomorrow when I get down to your place...... --Russ
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Absence of Evidence, is not Evidence of Absence. Bill Maher 8/4/09--- "I'll show you Obama's birth certificate, when you show me Sarah Palin's high school diploma." |
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12-26-2008, 08:29 PM
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