daverclasper Posted February 25, 2020 Report Share Posted February 25, 2020 Hi. Noticed this a few weeks ago, as the Thicker gaskets looked wet around the lower areas. This substance had collected at the low point of the carb/manifold joint (Stroms, 150 CD). Looks like it may have appeared after I filled up with diesel by mistake a bit back. Can't imagine what it is. Could diesel soaked into the gaskets and dissolved them some. Car appears to run as normal. Cheers, Dave Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 25, 2020 Report Share Posted February 25, 2020 The gaskets are paper so shouldn't dissolve; if it's black it could either be oil or soot - how do the plugs look? I'd worry more about the fuel lines and the rubber hoses; check to see if they're okay. It's got to be something that has been drawn into the carb so hasn't yet reached the engine, but it may just be deposits from dirty fuel that are not burning off - you may be right with the diesel idea. Link to comment Share on other sites More sharing options...
daverclasper Posted February 25, 2020 Author Report Share Posted February 25, 2020 (edited) Thanks Colin. Its the dark coloured gasket/spacer? thing (never removed them, so not sure what there made of (on each carb) between the paper/card ones, about 3mm/4mm thick from memory. I assumed they were a standard fitting?. Hoses were the supposedly good ones (barracade?), can't quite remember from Moss, fitted a few months back, but will have a look to see if they appear to be disintegrating Plugs are running clean. Edited February 25, 2020 by daverclasper Link to comment Share on other sites More sharing options...
Paul H Posted February 25, 2020 Report Share Posted February 25, 2020 Could the PO have used Wellseal or similar . I used Wellseal on the fuel bowl gaskets as the fuel bowl wasn’t flat and prior to sealant they leaked . The Wellseal has reacted to the petrol contact and looks dark brown and tacky though dry to the touch . Just a thought Paul Link to comment Share on other sites More sharing options...
thescrapman Posted February 26, 2020 Report Share Posted February 26, 2020 Then brown stuff is the residue after petrol has evaporated, so you have a very slow weep somewhere, overtime it builds up. Link to comment Share on other sites More sharing options...
daverclasper Posted February 26, 2020 Author Report Share Posted February 26, 2020 Thanks. The part that has discoloured and possibly softened/disintegrating is called an "insulator" on one parts diaghram I have. Anyone know what it is made off please. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 26, 2020 Report Share Posted February 26, 2020 generally /they were either an asbestos/ mix or type of plastic based heat isolator pete Link to comment Share on other sites More sharing options...
daverclasper Posted February 28, 2020 Author Report Share Posted February 28, 2020 Thanks. As I don't know what it is, I think I'll ignore it. If it develops manifold leak, then review. Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 28, 2020 Report Share Posted February 28, 2020 good plan dave, Pete Link to comment Share on other sites More sharing options...
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