 Exhaust or Head Leak?, The verdict is in |
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| Aaron Cox |
 Dec 5 2005, 07:52 PM
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#41
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Professional Lawn Dart  Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California  |
marty you nut!! lol
and the copper flywheel - is that the rare 911 S piece? the one usually coupled to the Alumium pressure plate? cool pics, thanks for sharing. oh ron - is it a sandcast case? arent those big bucks? |
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| Maltese Falcon |
Dec 5 2005, 07:59 PM
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#42
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Advanced Member Group: Members Posts: 4,701 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None  |
...Nuther, couldn't resist...the 2.7 going into the '74. I kept the engine N/A for 1,000 miles to seat the rings. Single rajay turbo went in after break-in. It was a handful with the narrow tires and small brakes (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)
Hope it works out for you ! Marty Attached image(s) 
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| Allan |
Dec 5 2005, 08:03 PM
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#43
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Marty, I'm thinking I should have listened to you in the first place. What makes me leery is the dogs butt
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| Porsche Rescue |
Dec 5 2005, 08:06 PM
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#44
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Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
Seems to me it is either going to stay tight or not. Worrying about it won't change anything. Drive it until it breaks. Then decide what to do.
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| Maltese Falcon |
Dec 5 2005, 08:09 PM
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#45
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Advanced Member Group: Members Posts: 4,701 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Allan, Doggy was named Napoleon, owned by the strange dude that I rented the workshop from . We had a nickname for him also-but he's proll'y lurking all of the Pcar boards, so one must BE careful !
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| Flat VW |
Dec 5 2005, 08:11 PM
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#46
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Illegal Soapbox Derby Racecar Group: Members Posts: 1,692 Joined: 13-November 04 From: Phoenix, AZ Member No.: 3,105 |
I would accept "it will take torqueing" over "it ain't ever gonna take torque", any day. John |
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| Allan |
Dec 5 2005, 08:51 PM
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#47
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Me too... I hope like hell this works. I still haven't heard how the studs pull. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Just how to fix them and how to be prepared when they do. |
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| Flat VW |
Dec 5 2005, 09:05 PM
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#48
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Illegal Soapbox Derby Racecar Group: Members Posts: 1,692 Joined: 13-November 04 From: Phoenix, AZ Member No.: 3,105 |
[/QUOTE]
Me too... I hope like hell this works. I still haven't heard how the studs pull. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Just how to fix them and how to be prepared when they do.[/QUOTE] Where is SHLITZZ when you need him? Also, is the "pulling stud" thing mainly a "six" phenomena? (looked up the spelling in the dictonary{sp}!) John P.S. I seem to read it more with the sixes, I think..... (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif) |
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| J P Stein |
Dec 5 2005, 09:17 PM
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#49
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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 |
Studs pull because steel studs expand at a lesser rate than Aluminum. Mostly this happens in hot climates with the thermal reactors in place or otherwise when an engine is allowed to overheat. The stud is a bunch stronger than the threads in the magnesium.
The best cure is Case Savers...not time certs + Divilar studs + a real good external oil cooler + all the cooling mods you have ever heard of. In 4 years of running, my engine has never seen over 100C (212F)...per the gauge.....all of the above were done.....In fact, I have trouble getting it warm enuff at AX. (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) |
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| Allan |
Dec 5 2005, 09:46 PM
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#50
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
One of the problems I have is that the temp gauge doesn't work...
I understand how thermal dynamics affect different base metal/alloys but I am looking for some real world experiences.... If the mag case will gradually grow weaker and weaker and allow the stud to drift even though it "seems" it's being re-torqued over and over, I need to know.... Thanks.. |
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| goose2 |
Dec 5 2005, 10:07 PM
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#51
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Senior Member Group: Members Posts: 976 Joined: 30-March 05 From: Eugene, Oregon Member No.: 3,847 Region Association: Pacific Northwest |
I think case savers and divilar studs can be a fairly permanent cure for the magnesium cases....as long as the heat is reasonably well controlled. I understand that this became a problem when the displacement grew from 2.4 to 2.7...more stress on the mag case and less material around the spigots...combined with more heat. Some of the 2.7's had a fan with fewer blades in an attempt to reduce fan noise. Another good thing upgrade for 2.7's.
When Porsche went to the 3.0, the cases were again made from aluminum and stud pulling is rare...but the early divilar studs were prone to corrosion and breaking. |
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| Allan |
Dec 6 2005, 01:37 PM
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#52
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
It's done!!!
Went to my mechanics place to check on things and he is finished. Took the car out for a quick test drive and it runs really well. Sounds like how a bad ass six should. This thing is fast. (IMG:http://www.914world.com/bbs2/html/emoticons/burnout.gif) Apparently the head leak was screwing up everything. Even the 46mm carbs seem alot more agreeable. I hope it stays together for awhile. |
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| Porsche Rescue |
Dec 6 2005, 01:56 PM
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#53
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Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
A six always runs/sounds better than a five. Here's hoping it will last. Enjoy
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| MoveQik |
Dec 6 2005, 01:59 PM
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#54
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What size wheels can I fit? Group: Members Posts: 4,645 Joined: 5-April 05 From: Scottsdale, AZ Member No.: 3,881 Region Association: Southwest Region |
(IMG:http://www.914world.com/bbs2/html/emoticons/chairfall.gif) |
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| markb |
Dec 6 2005, 02:28 PM
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#55
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914less :( Group: Members Posts: 5,449 Joined: 22-January 03 From: Nipomo, CA Member No.: 180 Region Association: Central California 
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| Root_Werks |
Dec 6 2005, 02:59 PM
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#56
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Village Idiot Group: Members Posts: 8,337 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
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(IMG:http://www.914world.com/bbs2/html/emoticons/boldblue.gif) I would ponder and say WTF, but I am just glad to see it torqued up and is holding. that is a GOOD sign! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)
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