MuddyWinny Posted September 29, 2016 Share Posted September 29, 2016 For some reason, after a while I seem to find damp oil patches where the diff housing hasn't sealed to the axle casing properly. Normally I use sealant (black silicone or Hylomar blue and a gasket. This time I was going to try black silicone sealant with no gasket. Euro car parts sell Loctite SI 5940 (and Sikaflex - this came up from a google search - but it seems more for filling gaps in bodywork?) Halfords sell Granville Instant Gasket (never had much luck with instant gasket) and Granville Black Silicone Sealant. At the moment I'm tempted for the Loctite SI5940. Can anyone recommend a silicone sealant that worked well for them? Thanks Mark Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted September 29, 2016 Share Posted September 29, 2016 I find this good, and seals itself properly after: http://www.ebay.co.uk/itm/Wynns-Black-RTV-Instant-Gasket-Maker-200ml-Power-Can-57680-/322261458258?hash=item4b08479d52:g:eBQAAOSw-KFXfh7Q Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted September 29, 2016 Share Posted September 29, 2016 You need RTV, not just silicone sealer. RTV is oil tolerant. Mo Quote Link to comment Share on other sites More sharing options...
Ex Member Posted September 29, 2016 Share Posted September 29, 2016 Make sure the surfaces are not damaged. No sealant should be needed. A little grease and a paper gasket. Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted September 29, 2016 Share Posted September 29, 2016 Gasket smeared with grease for every time. Quote Link to comment Share on other sites More sharing options...
MuddyWinny Posted September 30, 2016 Author Share Posted September 30, 2016 Thank you for all your replies. I make sure the surfaces are clean and free from the old gasket etc but there are a few marks where someone has removed the diffs before. I've tried to make sure there are no raised points but there's a limit to how good it'll ever be. I have 2 diffs to fit so I'll try one with a greased gasket an the other with RTV and see how it goes. Mark Quote Link to comment Share on other sites More sharing options...
reb78 Posted September 30, 2016 Share Posted September 30, 2016 If you do have any scores in the gasket surfaces, I have used JB Weld on these before (on my timing case in this instance), which gives you a nice smooth surface once sanded back flat. Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted September 30, 2016 Share Posted September 30, 2016 A good rub with an oil stone will make sure any high spots are removed. Quote Link to comment Share on other sites More sharing options...
V8 Freak Posted October 1, 2016 Share Posted October 1, 2016 I use this with a light bead on diffs can not had a leak yet.. http://www.loctite.co.uk/loctite-4087.htm?nodeid=8802653274113 Available in Halfords etc. Quote Link to comment Share on other sites More sharing options...
MuddyWinny Posted October 3, 2016 Author Share Posted October 3, 2016 Thanks for all the help, most appreciated. I'm tempted to try the JB weld on the back of the water pump housing where the p-gasket has left an impression and there has been some corrosion. I guess I'll need to be very careful or I'll put the alternator and water pump pulleys out of alignment with the others. Quote Link to comment Share on other sites More sharing options...
landroversforever Posted October 5, 2016 Share Posted October 5, 2016 RTV sealant for me with zero leaks (cue the comments about the truck being off the road for so long). LR haven't specified gaskets for ages. Quote Link to comment Share on other sites More sharing options...
neil110 Posted October 6, 2016 Share Posted October 6, 2016 I have used this and it is utterly wonderful. http://www.turnerengineering.co.uk/sealing-compound-elring-dirko-s-c2x20634602 Quote Link to comment Share on other sites More sharing options...
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