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Oil breather gasket installation
1989 911 3.2 Carrera engine rebuild.
Wayne's book says install breather cover gasket dry. Ultimate sealant thread says use loctite 574. Do I use the 574 on both sides of gasket? If only 1 side which one? I did my triangle of death several years ago and installed dry with no problems but going with current conventional wisdom. Thx! Mark
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1989 911 Carrera 3.2 2009 Audi A4 2.0TQA 2017 BMW X3 2007 BMW 328xi 1971 BMW R60/5 |
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05-31-2019, 11:29 AM
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Rosco_NZ
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These things are known to warp really badly & source of leaks ... sand flat on a machined block first.
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05-31-2019, 11:32 AM
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I should also mention I have the Wrightwood racing gasket set so the breather gasket is the grey/silver one.
Regarding sanding, the cover is extremely smooth and flat. The block is assembled so doesn't seem prudent to sand anwhere near openings. Thanks! Mark
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1989 911 Carrera 3.2 2009 Audi A4 2.0TQA 2017 BMW X3 2007 BMW 328xi 1971 BMW R60/5 |
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05-31-2019, 01:08 PM
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I ended up putting a thin layer of 574 on both sides of gasket and buttoned things up.
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1989 911 Carrera 3.2 2009 Audi A4 2.0TQA 2017 BMW X3 2007 BMW 328xi 1971 BMW R60/5 |
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05-31-2019, 03:24 PM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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One sealant not on the list is Loctite SI 5900, I rub a little bit into paper gaskets and use it under nuts, etc, never leaks.
Yes it's an RTV, get over it, it's not the old RTV. Did you know that threebond/yamabond is RTV? Loctite SI 5900 is porsche spec on 996/997 engines. Not affected by fuel and oil, when used correctly it's good stuff.
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. |
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06-01-2019, 04:17 PM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,991
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5900 is good stuff. We use it on every M96/97 motor we build as well as various other jobs around the shop. It is not a product we have used in addition to a gasket, but others like Mark may have had success doing so.
However, the breather cover should not need any sealant. If you choose to add a sealant, many have had great success with a thin coating of Loctite 574, just enough to get it wet... Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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06-01-2019, 07:12 PM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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As I said I just rub a bit of 5900 into the paper gasket, no excess what so ever is an important note.
On removal the old gasket peels off whole with little clean up. I also discovered 5900 from building M96/97 engines, at first I was taken aback that it was RTV, but quickly realized it was a superior product. I've disassembled lots of M96/97 engines that pervious wrenches had used way too much product, not good but the squeeze out never goes anywhere. I tried this trick with threebond, sealed well, but removing it just ripped the gasket in half and was a total PITA to clean up, so I don't recommend trying this with the threebond.
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. Last edited by Mark Henry; 06-02-2019 at 05:49 AM.. |
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06-02-2019, 05:34 AM
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1989 Porsche 911 Carrera
2009 Audi A4 2.0TQA
1971 BMW R60/5 Motorcycle
