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Registered
Join Date: Oct 2007
Location: South Bay Los Angeles
Posts: 33
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Broken Cylinder Head Stud
I finally had the guts to adjust my valve's on MY78 during the weekend. Although I haven’t had the chance to start her up because I'm still working on swapping exhaust for new SSI's and M&K duals. I found a broken cylinder head stud lying by number three cylinder. Don't know when this happened. I don’t have any engine performance problems that I know of the cars runs good and strong. I've owned the car for 28yrs so sure no power lost.
Here are my questions. What will happen if I don’t fix the stud? What will it take to fix this problem? What will cost? I have lots of carbon build up on exhaust cylinder 1&3 and the rest are clean. What can I do to clean the carbon? |
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06-13-2011, 10:00 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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If you don't replace the broken stud, you will ruin the cylinder head due to fretting at the sealing surfaces.
You need to pull all the heads and replace the valve guides if they are original: thats why you see the excess carbon in some of those ports. You didn't say how many miles are on your car, but if its over 100K, you'll likely need new exhaust valves. The heads are all cleaned up during a proper valve job so thats not a problem for you. Costs will depend who does the work and what parts are replaced,.... 
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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06-13-2011, 10:28 AM
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