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Join Date: Feb 2003
Location: Gladstone, MI
Posts: 271
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A good day for my mid-year!
Well, after a year or so of fussing with an engine that would die when braking for stoplights, bizarre idle, etc, I finally took the plunge and removed my CIS and replaced all the gaskets, o-rings, and intake runner hoses.
I think the main sources of my airleaks were the CSV o-rings and the lousy old warped intake runner hoses (I think that's what they're called anyway). I cleaned everything up, and for yucks even painted around the seam of the airbox (even though I couldn't find any cracks!) with some epoxy from West Marine. Put everything back together on friday and started her up--the fuel mixture was way off (HOORAY!) like by 5-6 full turns of the screw. Dialed it in and I was good to go! I've been driving it for a few days now and the idle is steady no problems whatsoever... Keeping my fingers crossed. In all, about 2 hrs to remove the CIS (didn't even have to do a partial drop!), about 3 hours of cleaning and replacing parts, and another 3 or so to re-install. Time well spent!
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Kris - '77 911S |
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05-07-2006, 07:01 PM
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Join Date: Dec 2004
Location: Novato, CA
Posts: 3,064
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Nice job! CIS works well if clean and well-sealed. Enjoy it,
ianc
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BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 |
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05-07-2006, 07:14 PM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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Good work!
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Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
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05-07-2006, 07:41 PM
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Join Date: Apr 2005
Location: Brisbane, Australia
Posts: 560
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kpfoten,
Please help. Which o rings are you talking about exactly? I am about to do exactly what you have done. I have organised the intake runner rubber sleeves, and a new set of intake gaskets from our host, but I haven't planned for any o rings. Anything else that I should order? I'm in Australia so I need to plan ahead. Thank you.
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“If you want to win anything- a race, yourself, your life- you have to go a little berserk” - Dr George Sheehan. “Happiness is different from pleasure. Happiness has something to do with struggling and enduring and accomplishing.” - Dr George Sheehan. |
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05-08-2006, 02:22 AM
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kpfoten,
It sounds like you did exactly what your car needed - great job! 9elf, For my car, the CIS parts that were in the worst shape were the following: The injector o rings = 999-701-423-40-M16 The injectors are mounted in plastic sleeves that get hard and brittle with age = 911-110-886-03-M260 These sleeves also have o rings = 999-701-446-40-M17
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Rex 1975 911s and 2012 Range Rover Sport HSE 1995 BMW R1100RS, 1948 Harley FL Last edited by Walter_Middie; 05-08-2006 at 05:16 AM.. |
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05-08-2006, 05:14 AM
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Join Date: Feb 2003
Location: Gladstone, MI
Posts: 271
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9elf:
I found that my cold-start injector o-rings (The inner and the outer plenum) were in awful shape. The inner one is available from Pelican (forgot the part number) but the outer one is NLA. I got something real close (It wasn't metric) from a local auto parts store. I also changed the gasket which mates the fuel distributor to the airbox. Good luck--let me know if you need any advice.
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Kris - '77 911S |
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05-08-2006, 07:13 AM
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Join Date: Mar 2004
Location: Riverside, CA
Posts: 217
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These O-rings and injector sleeves are all removable? I remember that the sleeve seemed to be swedged into the intake runner the last time I had it apart.
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Dave '75 911s Coupe |
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05-08-2006, 07:56 AM
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Join Date: Apr 2005
Location: Brisbane, Australia
Posts: 560
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Thank you kpfoten and Walter Middie.
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“If you want to win anything- a race, yourself, your life- you have to go a little berserk” - Dr George Sheehan. “Happiness is different from pleasure. Happiness has something to do with struggling and enduring and accomplishing.” - Dr George Sheehan. |
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05-08-2006, 10:58 AM
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1975 Porsche 911s
