FARK ... The Porsche Gods Do Sing, For Gwen |
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FARK ... The Porsche Gods Do Sing, For Gwen |
SLITS |
May 10 2010, 10:50 AM
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#1
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Ok, tore down the Grey Ghost's engine to determine what happened on the way to Wickenburg ... images below:
I am missing something: (IMG:http://www.914world.com/bbs2/uploads_offsite/i239.photobucket.com-1696-1273510232.1.jpg) Oooooo, that hurts: (IMG:http://www.914world.com/bbs2/uploads_offsite/i239.photobucket.com-1696-1273510232.2.jpg) Bits and pieces: (IMG:http://www.914world.com/bbs2/uploads_offsite/i239.photobucket.com-1696-1273510232.3.jpg) Tested all factors on the CIS and flow on the injectors is within 5% of each other. Analysis: Cylinders 1 & 2 on a flat six are the poorest cooled of all. Apparently, #1 got hot and detonated (poor gas, bad timing) and broken ring lands / rings were the result. Oh well, now in search of a good used Mahle P&C. I will be adding a Cylinder Head Temperature Gauge to #1 cylinder to monitor temps from now on. Thank you Ferry, where ever you are in the universe ............... |
J P Stein |
May 10 2010, 09:04 PM
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#2
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Detonaion is a distinct possibility, however.....
The oil ring in the pic is not stock....nor as good as stock (IMO), but that's another subject. Neither of the pics show the piston tops or the effected area of the clyinder top adjacent to the broken area. Both of these spots can show detonation damage. Being as the engine has been re-ringed a check of the clearance between the ring and the land should be done. .004 is max spec. If it is over that, rings have been known to hammer them sevles(and/or the ring lands) to death. Detonation should be visable on the piston tops in the from of bare & possibly mented aluminum. The inner cylinder groove wall for the head gasket is often cracked or distorted in some way by detonation. The cylinders may be worn out of spec making re-ringing not an option on the whole set. If you know all this stuff already, ignore me. (IMG:style_emoticons/default/confused24.gif) THIS is detonation..... beyond a doubt. Attached image(s) |
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