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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
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Leaky carb'Views : 721 Replies : 6Users Viewing This Thread : |
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Sep 18th, 2020, 20:05 | #1 |
arcturus
Last Online: Today 08:17
Join Date: Mar 2006
Location: Sagres Portugal
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Leaky carb'
Could this be the cause,all the pitting on the contact area where the jet holder mates with the carb' body? I have never been able to stop this carb weeping no matter which seal type I use. I think that I will try a smear of gasket sealant on the face in the hope that some of the pitting will be filled. Any comments?
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Sep 18th, 2020, 20:45 | #2 |
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J.B.Weld is a very useful product for such problems (two pack epoxy) you would have to remove the carburettor to gain proper access: ~ it tends to initially slump so some masking up will be required- when dry it can be sanded back to shape- product is also inert to most aggressive fluids. I would think that a thin coating of gasket sealant would also do if you dont fancy a more involved job.
(J.B. Weld should be in every tool box) Bob Last edited by Bob Meadows; Sep 18th, 2020 at 21:28. |
Sep 18th, 2020, 21:55 | #3 |
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Join Date: Jul 2007
Location: Connecticut, USA
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Arcturus;
Try to determine from disassembly, if that surface is critical to sealing...does it have a copper displacement washer, or fiber seal? I don't think this is the precisely applicable x-ray drawing for your HS4(?), but it might allow you to determine if that is a sealing surface, in which case the discontinuities will certainly work against a good seal and allow weepage: Source: https://www.sw-em.com/checkchoke.htm It does look like that surface could be touched up very carefully, flat and just through the pitted surface, with a file...check also the circumferential sealing of the "cork gland washer" shown...if sloppy, you might need to renew/replace. Good Hunting! |
Sep 19th, 2020, 02:45 | #4 |
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Can you place a piece of 350 grit sandpaper on a piece of glass or flat metal and scrape that surface on the paper? Then 500 grit, then 1000?
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Sep 19th, 2020, 09:44 | #5 |
arcturus
Last Online: Today 08:17
Join Date: Mar 2006
Location: Sagres Portugal
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Well,if the sealant doesn't work then it's plan "B" a more refined version of the pictured mock up spun in my drill press with light pressure against the mating surface
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Sep 20th, 2020, 13:27 | #7 |
arcturus
Last Online: Today 08:17
Join Date: Mar 2006
Location: Sagres Portugal
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So far all OK.I used a thin smear of Wurth silicon special 250, the same as I used on my leaking rear cam plug. The new jet assembly and needle has made a huge difference,I'm now able to balance the carbs. Just need a good hard run to read the plugs and fine tune mixture.
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life's too short to drink bad wine Last edited by arcturus; Sep 20th, 2020 at 13:39. |
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