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Bee Jay |
Apr 25 2005, 04:54 PM
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#1
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Member Group: Members Posts: 204 Joined: 22-April 05 From: Lompoc, Ca. Member No.: 3,964 |
I didn't make the WCC because of this sound coming from the engine compartment. It didn't get louder when we plugged the tailpipe. I ran a compression check this weekend. Cylinders 1,2 & 3 were 100lbs +- 5%, but number four was only 50lbs. OK, the head is either cracked or the head to piston seal is gone. There are only 4K miles on the engine since Wayne Dempsey, Tom Gould and I built it in 2000. There was a lot of debate at the time on whether or not to include the copper "head gasket" and the popular advice was to leave it out. Am I to regret that decision? My 3.0 motor isn't ready, I haven't even started tearing it down yet, so I guess I need to drop this 2.0 liter, and repair the head leak, if I want to drive it this summer.
Bee Jay My car: http://www.picturetrail.com/gallery/view?p...2754&uid=598455 |
Cap'n Krusty |
Apr 25 2005, 05:33 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
If your machinist does the job right, why would you want to introduce the random uneveness of lapping the heads? He uses years of experience, and a real expensive and real precise vertical milling machine. Costs and weighs more than your car. You use your hands, tools not known for their precision, nor the repeatability of the results. As for leaving out the head gaskets on an engine designed to use them, I fail to see the benefits. Porsche decided to leave them out of the 964 motors, BY DESIGN, and it has been a nightmare for both them and the car owners. VW took them out of their 2 litre heads, but they also lowered the compression, redesigned the heads, and added an EGR system in an attempt to keep the combustion temps down. Didn't work, BTW. The Cap'n
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