Thomas Harborne Posted December 5, 2016 Share Posted December 5, 2016 Hi all hope everyone is well. I seem to have developed a knocking noise from the rear of the car behind the passenger seat. Got my head inside the engine bay, not coming from the engine block and does it whilst stationary. It doesn't alter with revs either. Planning on taking the car.over to gavs in the new year but just wondered if anyone has experienced anything similar? Link to comment Share on other sites More sharing options...
Chris_edeson Posted December 5, 2016 Share Posted December 5, 2016 I had this and it ended up being brake pads rattling! Link to comment Share on other sites More sharing options...
kieranexige Posted December 5, 2016 Share Posted December 5, 2016 Christ I know it's cold but I wouldnt think the pads are rattling when it's stationary Chris. Lol. Is it a knocking or a rattle?. Does it come and go with the clutch depressed? Link to comment Share on other sites More sharing options...
Thomas Harborne Posted December 5, 2016 Author Share Posted December 5, 2016 Definitely knocking. Haven't checked. Will see if that makes any difference tomorrow. Link to comment Share on other sites More sharing options...
jonnyfox Posted December 6, 2016 Share Posted December 6, 2016 Charcoal canister used to make a knocking rattle behind the drivers seat in my S2, it sits behind the passenger seat on an S1. Link to comment Share on other sites More sharing options...
dobbo Posted December 6, 2016 Share Posted December 6, 2016 The charcoal canister valve is a solenoid valve, so is usually a clicking noise rather than knocking, but that could depend how bad the valve is. Easy enough to check, though. Simple connector for the wiring with a spring tab to release it. Car will run fine with it disconnected and no MoT issues either, which makes you wonder why it was ever fitted ! Not sure where it is on the S2, but this should help (still looks like the engine bulkhead behind the pax seat) https://www.deroure.com/partinfo.asp?MAK=0&MDL=0&TBL=0&SMA=1&SMO=14&ST=charcoal&SC=0&PBID=40084 Unfortunately, DeRoure says this part has been replaced, and also shows the replacement as obsolete ! Link to comment Share on other sites More sharing options...
kieranexige Posted December 6, 2016 Share Posted December 6, 2016 Definitely knocking. Haven't checked. Will see if that makes any difference tomorrow. Any news?? Pretty sure it was behind the drivers side of my Toyota s2. Be interested to see if it's still there with the clutch depressed. Link to comment Share on other sites More sharing options...
Thomas Harborne Posted December 7, 2016 Author Share Posted December 7, 2016 Just had a look. On first start up its fine. Gets warm and noise appears. Still does it with clutch pedal pressed down. Link to comment Share on other sites More sharing options...
Thomas Harborne Posted December 7, 2016 Author Share Posted December 7, 2016 Cheers Dobbo ill take a look tomorrow. Car is S2 Elise. The charcoal canister valve is a solenoid valve, so is usually a clicking noise rather than knocking, but that could depend how bad the valve is. Easy enough to check, though. Simple connector for the wiring with a spring tab to release it. Car will run fine with it disconnected and no MoT issues either, which makes you wonder why it was ever fitted ! Not sure where it is on the S2, but this should help (still looks like the engine bulkhead behind the pax seat) https://www.deroure.com/partinfo.asp?MAK=0&MDL=0&TBL=0&SMA=1&SMO=14&ST=charcoal&SC=0&PBID=40084 Unfortunately, DeRoure says this part has been replaced, and also shows the replacement as obsolete ! Link to comment Share on other sites More sharing options...
scatty Posted December 7, 2016 Share Posted December 7, 2016 I had this rattle once on my old one, turned out to be a crack in my zorst.. Spot of gav welding and it was all sorted....take it to gavs, you could be forever trying to find it... Link to comment Share on other sites More sharing options...
Thomas Harborne Posted December 7, 2016 Author Share Posted December 7, 2016 Yeah thats the plan, although i wont have time until after christmas but thats not a problem. I'll check the cannister tomorrow. If it isn't that ill call gav and book it in. I had this rattle once on my old one, turned out to be a crack in my zorst.. Spot of gav welding and it was all sorted....take it to gavs, you could be forever trying to find it... Link to comment Share on other sites More sharing options...
Daveb99 Posted December 8, 2016 Share Posted December 8, 2016 Have a chat with Colin - he must have a database of Lotus rattles and how to fix them by now!!! Link to comment Share on other sites More sharing options...
kieranexige Posted December 8, 2016 Share Posted December 8, 2016 There will be Plenty of cardboard knocking around after Christmas Link to comment Share on other sites More sharing options...
TimSportsTourer Posted December 8, 2016 Share Posted December 8, 2016 Have a chat with Colin - he must have a database of Lotus rattles and how to fix them by now!!! There's isn't a database in the world can deal with a list that long! Link to comment Share on other sites More sharing options...
Thomas Harborne Posted December 10, 2016 Author Share Posted December 10, 2016 Hi guys finally got round to checking the charcoal cannister. It is definitely the solenoid. Got the car warm and knocking started behind passenger seat, felt the top of the solenoid and could feel/hear it knocking. Unplugged and disappeared straight away. Next question, can i replace or even clean this? Easy to get hold of one? Link to comment Share on other sites More sharing options...
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