Sounds like a perfect result to me...keep doing what you're doing (oh, but fix your .sig picture
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| Eric's once a year compression test #'s.... https://www.slantsix.org/forum/viewtopic.php?t=18914 |
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| Author: | Eric W [ Sun Jul 30, 2006 6:31 pm ] |
| Post subject: | Eric's once a year compression test #'s.... |
....What do you think? 1. 145 2. 142 3. 155 4. 154 5. 155 6. 151 I only did one test, though I did check the # 1 and 2 cylinders again and got the same reading. This was done with the throttle plate and choke open, warm engine. Plugs (the extended nose NGK's Dan recommended) looked white but clean. Probably due to the large amount of freeway driving the engine does. All in all, not bad, eh? |
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| Author: | SlantSixDan [ Sun Jul 30, 2006 6:44 pm ] |
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Sounds like a perfect result to me...keep doing what you're doing (oh, but fix your .sig picture )
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| Author: | ESP47 [ Tue Nov 07, 2006 3:03 pm ] |
| Post subject: | |
I ran a compression check yesterday and got the results 1. 124 2. 125 3. 130 4. 132 5. 125 6. 133 Are these ok for a slant 6 after 101,000 miles? |
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| Author: | Jeb [ Tue Nov 07, 2006 6:16 pm ] |
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Those are pretty good numbers for a 100,000 mile engine. You should not have anything to worry about. My 200,000 mile Duster has less than 95 psi in all cylinders. |
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| Author: | argentina-slantsixer [ Tue Nov 07, 2006 8:22 pm ] |
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cams plays in those numbers too... my big cammed engine cranks 120 PSI when it was cranking 160 plus with the stock 244/244 cam. Shoulda raised the static CR and not be such a wussy when porting that head... I'll fix that! |
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| Author: | ESP47 [ Wed Nov 08, 2006 2:29 pm ] |
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Thanks guys |
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| Author: | emsvitil [ Wed Nov 08, 2006 3:31 pm ] |
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One thing about compression testers: The schrader valve takes a certain amount of differential pressure before it even opens (and it varies with valve, age of valve....,etc). Your gauge will read that amount low. So you need to hook it up to a known pressure to figure how much low your gauge reads so you can figure out what your real compression is. |
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| Author: | Tim Keith [ Wed Nov 08, 2006 9:19 pm ] |
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I checked my 225 of unknown mileage, it had #1 135 lbs and ~ 160 lbs for the other five. These numbers seem to be high because it runs poorly and leaks lots of oil, although the plugs are a light tan color. I have two guages, I should recheck it using the other guage set. |
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