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Registered
Join Date: Jun 2002
Posts: 893
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Cis distributor head cleaning
I have a 3L cis fuel head that has been sitting for awhile. I know it needs cleaning
and flushing. I read where if you take it apart and clean it to be very careful and assemble it with loctite 242. Has anyone done this. Is it possible to clean these adequately without disassembly. Thanks in advance |
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06-20-2012, 09:37 AM
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Less brakes, more gas!
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There is a thread here somewhere where a guy took his apart and cleaned it then put it back together. It seemed fairly straight forward and easy to do. Just be ultra slow and careful to put all the right parts back in their respective locations. I believe that the most common issue is that the center plunger gets stuck... after that there just isnt that much to it...
It seems that this item is still a fairly rarely serviced item though. Most people, I suspect, when they have serious issues with their CIS will venture into a full replacement with carbs or EFI. I also believe that Vertex may rebuild these. My guess on cleaning would be blowing carb cleaner through it and letting it soak. -Michael
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 Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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06-20-2012, 10:19 AM
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Less brakes, more gas!
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Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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06-20-2012, 10:21 AM
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Join Date: Sep 2005
Location: Northern Virginia
Posts: 1,792
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I used Hylomar HPF -- "painted" on very thinly and carefully with a toothpick on both halves -- when I checked, cleaned and re-assembled a spare fuel distributor. It's now in my cabriolet because I couldn't stand not knowing if it would work (and what do you know, it does work).
This spare fuel distributor was actually pretty clean on the inside (just a small fleck or two of rust/dirt). I like Hylomar because you don't have to worry about setup time. Brian
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'82 SC Targa '83 SC Cabriolet |
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06-20-2012, 10:59 AM
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Join Date: Jun 2002
Posts: 893
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Thank you Euro911sc and 82 911sctarga for all your helo
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06-20-2012, 10:09 PM
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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i would not take it apart until i had tried other ways of cleaning it and then tested it.
there may be better ways or better products to use. i would pull out the plunger and inspect that first. if ti looks good, i might soak it in techron then blow it out with air. not sure about using carb cleaner because of the rubber Orings inside. once onthe car i would check fuel flow from each of the lines. i would be concerned about volume between all the lines, with and without injectors. if you take it apart, make sure you leave the cylinder that the plunger slides in in the top half. that cylinder has slits that need to line up to slits in the top half, it also has Orings that would need to be replaced if you remove it. i dont know for sure, but i assume bosch has a jig to line the slits up by using the "cutouts" in the bottom of the cylinder. no loctite. be careful with the shim. dont bend it. make sure everything is "extremely" clean and it wont leak.
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86 930 94kmiles [_ _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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06-21-2012, 05:58 AM
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Ugly Betty
