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Join Date: Jan 2018
Posts: 878
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67 911 exhaust off or sleeping dogs lie
I'm getting my 911 ready for a start after 15 or 20 years in storage.
Motor and trans out. 52 years of grease washed. Some seals gaskets etc. New ring gear. Carbs etc. Now the oil line that goes behind the engine. i want to replace. Looks like the exhaust needs to come off. If they come off I can clean more and get the pipes cetamic coated. I've heard horror stories about broken studs. Do I flip it over and have a go or leave it. Lyndon 
Last edited by Lyndon302; 12-11-2019 at 02:34 AM.. |
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12-11-2019, 02:28 AM
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Why do you want to replace the oil line? Is it cracked or dried out?
I just did this to my 68 engine that was sitting for 27 years. Pulled it all apart so I had to take off the heat exchangers. No issues at all. A couple of the studs came out with the barrel nuts but that was it. Flip it over, take a look. If not too corroded give them a try. But if they seem stuck, either soak them with PB or apply some heat and they should come off without issue. Good luck!
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Lou |
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12-11-2019, 04:37 AM
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1988 Carrera
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If you sand blast your heat exchangers, do not install them with the engine flipped over. No mater how much you clean the some sand will spill in the cylinders thru the exhaust valves.
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88' Carrera 79' SC gone (lost to Katrina) 75' Targa gone 72'914 gone 72' 914 gone too |
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12-11-2019, 06:44 AM
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Great advice. Thanks.
I want the hose gone as its 53 years old. I will give it s go. Thanks Lyndon |
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12-11-2019, 01:15 PM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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Heat cycle them with a MAPP or Oxy/acetylene torch while using penetrating oil or wax to lubricate the threads. they should come right off when hot.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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12-11-2019, 01:20 PM
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Be a good weekend job. New studs or am I pushing my luck
Lyndon |
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12-11-2019, 01:22 PM
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Registered
Join Date: May 2004
Location: Lake Cle Elum - Eastern WA.
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For a penetrating oil, I've had great luck with Kroil......I'd spray around each nut every few days for a week or two.....Then, heat as mentioned.......
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Bob S. 73.5 911T 1969 911T Coo' pay (one owner) 1960 Mercedes 190SL 1962 XKE Roadster (sold) - 13 motorcycles |
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12-12-2019, 06:27 AM
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Join Date: Apr 2011
Location: behind the redwood curtain, (humboldt county) california
Posts: 1,434
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May not be wise to turn engine upside down.
Quote:
A less likely scenario is that, while banging on the engine, a chunk of carbon from an exhaust port could drop into a cylinder. If you are going to take the engine apart, no problem. Hopefully, we will hear from those of more experience. chris |
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12-12-2019, 07:10 AM
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Update. They came off like they were in cheese.
So I had a crack at the studs. Had to put heat on half of them. Cleaned the threads with a tsp and its like new. Muffler and heat exchangers off getting ceramic coated now. Didn't tip it upside down on some good advice. Drian tubes and cylinder tin are all out. I can now give it a better clean Lyndon 
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12-17-2019, 12:54 PM
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1983 911 SC
Wib
Porsche 911
