JAL73 Posted November 28, 2023 Share Posted November 28, 2023 I have a 2020 420R, always stored in a garage, only driven on dry days. I’ve noticed that condensation starts to appear inside the instrument glass (all of them, incl speedo and rev counter) once the car is warmed up into a long drive. Theres no condensation when I start the car from cold, it just gradually appears the longer I drive it. I think this happened to a tiny extent over the summer, but is much more noticeable in winter, obviously I’m using the heater a lot more now. Not sure what could cause this, whether it is a common problem and what the fix might be? Thanks! Link to comment Share on other sites More sharing options...
Benton Posted November 28, 2023 Share Posted November 28, 2023 Start here Link to comment Share on other sites More sharing options...
Area Representative Piers300 Posted November 28, 2023 Area Representative Share Posted November 28, 2023 TADTS 1 Link to comment Share on other sites More sharing options...
JAL73 Posted November 28, 2023 Author Share Posted November 28, 2023 Thanks very much for the link to the old thread, another common gremlin by the sounds of it, though I’m a bit nervous cutting drilling holes into the back of the instrument body. Will be busy this weekend hacking the dials and removing my rear ARB… Given this issue seems to go back a few decades, its amazing Caterham hasn’t modified the instruments with vents to avoid this happening to everyone during the colder months! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted November 28, 2023 Member Share Posted November 28, 2023 I have seen it suggested that it’s safer to saw a slot than to drill a hole… Jonathan Link to comment Share on other sites More sharing options...
Colin_T Posted November 28, 2023 Share Posted November 28, 2023 Sent my stack dash away once for condensation issue, was just an o ring. Link to comment Share on other sites More sharing options...
GulfSeven Posted November 28, 2023 Share Posted November 28, 2023 4 hours ago, Piers300 said: TADTS This. Link to comment Share on other sites More sharing options...
StevehS3 Posted November 28, 2023 Share Posted November 28, 2023 I haven’t noticed it do any harm to gauge. Perhaps the heat from the little lighting bulbs helps them clear. Link to comment Share on other sites More sharing options...
GulfSeven Posted November 29, 2023 Share Posted November 29, 2023 I think its annoying more than anything else. Motorbikes don't suffer this problem so why do Caterhams? Link to comment Share on other sites More sharing options...
JAL73 Posted November 29, 2023 Author Share Posted November 29, 2023 any specific preferred location on the instrument body to saw/drill the vents for condensation to escape? top or bottom? Link to comment Share on other sites More sharing options...
SM25T Posted November 29, 2023 Share Posted November 29, 2023 On the bigger gauges, I removed the rubber bung on the rear. Link to comment Share on other sites More sharing options...
colindavies56 Posted November 29, 2023 Share Posted November 29, 2023 JAL73,they are already drilled. Link to comment Share on other sites More sharing options...
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