 rebuild again, does Nikasil go bad? |
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| worn |
 Dec 27 2015, 07:03 PM
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#1
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can't remember  Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
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Saw a thread on the Pelican site showing a set of delaminated Nikasil cylinders. After cleaning up mine I see a few pinpricks. Cylinder 5 is by far the worst offender with what looks not so good to me. Would value response from those who know. I recognize that no 914 came equipped with them.
Longer view  Closer up  Would you be worried? Reusable? Thanks!! |
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| Jake Raby |
Dec 27 2015, 09:43 PM
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Ring tensions were ran too high for Nikisil in these pics. 8-11# is perfect for Nikiail, but you'll usually need to fish scale them to get them there, or work on the oil ring expanders to drop them.
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| worn |
Dec 28 2015, 10:13 AM
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#3
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can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(Jake Raby @ Dec 27 2015, 07:43 PM)  Ring tensions were ran too high for Nikisil in these pics. 8-11# is perfect for Nikiail, but you'll usually need to fish scale them to get them there, or work on the oil ring expanders to drop them. As in 8 to 11 pounds of tension needed to...pull the piston up or down with rings installed? Thanks Jake. Learning slowly but steadily. |
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Posts in this topic
worn rebuild again Dec 27 2015, 07:03 PM
mb911 I would use or send to us chrome in fondulac and h... Dec 27 2015, 08:47 PM
Mueller
Ring tensions were ran too high for Nikisil in t... Dec 28 2015, 10:25 AM Mark Henry Simple test feel the top ring ridge, if you feel a... Dec 28 2015, 08:39 AM worn
Simple test feel the top ring ridge, if you feel ... Dec 28 2015, 10:12 AM Luke M I just had my brothers 3.0 cylinders redone in Nik... Dec 28 2015, 10:20 AM sixnotfour Use Goetze piston rings ,you will have no problems... Dec 28 2015, 10:46 AM |
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