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Registered
Join Date: Dec 2003
Location: Severna Park, MD
Posts: 1,324
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machine shop advice - opinion
Got the call today and I know what I want to do on everything except 2 issues. They said the exhaust valve wear is out of spec and that 7 exhaust port studs are streched. The studs would be $140 and the valves are what ever the going rate is. My question is this, I pulled one exhaust stud myself before sending the heads (it had broken and was no problem) and I was planning on doing a full rebuild down the line with an eye towards performance and this one was to be just a broken head stud issue. What are your thoughts as I have other areas that I need to put the money? I hate to be a cheap skate but.......
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2002 C2 Cab, 1982 sc, 1978 sc, 1976 s,1985.5 944, 2003 Honda Pilot, 2001 Volvo X/C 70, 1977 FIAT 124 spyder (an abarth someday), 2 1984 Vanagon Westis 1958 BugEye Sprite, 1960 BE Sprite, 1978 Yamaha XS11 1970 Honda 750 K0, 1982 BMW R65RT, 1997 Duc 916 |
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03-26-2004, 10:18 AM
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Join Date: Dec 2003
Location: Severna Park, MD
Posts: 1,324
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I forgot, this is from Engine Machine Service (a place recommended by Pelican) and I feel they are being quite honest.
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2002 C2 Cab, 1982 sc, 1978 sc, 1976 s,1985.5 944, 2003 Honda Pilot, 2001 Volvo X/C 70, 1977 FIAT 124 spyder (an abarth someday), 2 1984 Vanagon Westis 1958 BugEye Sprite, 1960 BE Sprite, 1978 Yamaha XS11 1970 Honda 750 K0, 1982 BMW R65RT, 1997 Duc 916 |
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03-26-2004, 10:27 AM
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Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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That depends on whether you're prepared to dig out broken exhaust studs in case they break in the attempt. If so, DIY.
Sherwood |
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03-26-2004, 05:34 PM
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Join Date: May 2003
Posts: 3,346
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I've never heard of exhaust port studs stretching. What does this mean. If they're not broken then use them if they are then replace them. If the threads are crappy then chase them with a die.
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72 Carrera RS replica, Spec 911 racer |
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03-26-2004, 06:02 PM
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Join Date: Oct 2003
Location: London Ont Canada
Posts: 3,120
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The shop means they can see the stud has started to deform by stretching. (usually from overtightening). They are at the point where they start to thin out and will likely break upon reassembly.I caught this effect in a rod bolt a couple of years ago The bolt was almost 2 threads longer than the others and ready to snap. Exhaust studs are not as critical but now is the time they are easily replaced.
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 |
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04-25-2004, 05:59 PM
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Irrationally exuberant
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Life is too short to d**k with those studs if the case is already at the machine shop. Someday when you have to remove a broken exhaust stud you'll remember with fondness having had the machine shop remove these studs.
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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04-25-2004, 06:25 PM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,481
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$20 each is about the going rate. no fun DIY. they often get pretty ugly looking, and you wouldn't want to be assembling the exhaust after all that work and have one break.
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04-25-2004, 07:57 PM
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The Blue Pheonix
