landrovermanuk Posted January 8, 2009 Share Posted January 8, 2009 Like the title says...Will it work? I'm just about to replace the tail pipe on the 90. The new pipe cost £50 and the old one has lasted 5 years, so i was thinking about galvanizing it to make it last longer. I know stainless would be better but that's a bit too steep at the mo. So will it take the heat and make the pipe last longer? Thanks and Happy new year..... Quote Link to comment Share on other sites More sharing options...
disco_al Posted January 8, 2009 Share Posted January 8, 2009 don't think it would work, as you would end up with the zinc coating going inside and destroying the sound deadening material. better bet is to spray it with lots of high temp paint, then bake it in a large oven (maybe worth talking to a local bodyshop and slipping them £5 to put it in the corner of a paint oven for a few hours) Quote Link to comment Share on other sites More sharing options...
GBMUD Posted January 8, 2009 Share Posted January 8, 2009 better bet is to spray it with lots of high temp paint, then bake it in a large oven (maybe worth talking to a local bodyshop and slipping them £5 to put it in the corner of a paint oven for a few hours) If you could get the paint inside. An exhaust usually rots from the inside out as an engine makes sulphur dioxide which mixes with the water which the engine also makes and forms sulphuric acid on the inside of the pipe. I think that many exhausts are made from some zinc coated material anyway, ever noticed how they always seem to rust from a welded joint? Chris Quote Link to comment Share on other sites More sharing options...
missingsid Posted January 8, 2009 Share Posted January 8, 2009 If you could get the paint inside. An exhaust usually rots from the inside out as an engine makes sulphur dioxide which mixes with the water which the engine also makes and forms sulphuric acid on the inside of the pipe.I think that many exhausts are made from some zinc coated material anyway, ever noticed how they always seem to rust from a welded joint? Chris Adding to this, My experience is that the pipe through the middle of the silencer has perforations then the box is welded adound it. this is structuraly sound until the perforations rust through leaving the welds maintaining the structural integrety where the leverage on the welds is very high due to gravity. Most of my exhaust boxes have died whilst the weld and the box metal is still solid, it failed due to a fracture cuased by stress. The life could be rextended if the box has external trangulation webs from the box to the pipe to reduce the stress after the inner pipe has weakened. Marc. Quote Link to comment Share on other sites More sharing options...
landrovermanuk Posted January 8, 2009 Author Share Posted January 8, 2009 Thanks for your input.........I had thought about painting it. I thought the zinc coating would last even longer. It's just a pipe no silencer it runs from just in front of the rear axle to the end.....The finishing tip has rusted off and there is a rust hole just by the welded on joining flange........ Quote Link to comment Share on other sites More sharing options...
jacks906 Posted January 8, 2009 Share Posted January 8, 2009 why not get some one to make you a stainless system up cost on a car (mk2 golf) a few moons ago how ever i wanted it built was £180 and £250 for the manifold well worth the money an great job done by power flow altho you may be able get it made else were dave Quote Link to comment Share on other sites More sharing options...
Yostumpy Posted January 8, 2009 Share Posted January 8, 2009 I remember years ago seeing something in practical classics, or similar, about making your exhaust last longer, and it involved drilling a TINY hole in your silencer boxes at their lowest points, thus expelling excess moisture from short trips, by gravity dripping. Not sure its legal nowdays tho, mot? Quote Link to comment Share on other sites More sharing options...
Guest noggy Posted January 8, 2009 Share Posted January 8, 2009 who would notice a tiny hole?? stick some mud over it for the MOT? Quote Link to comment Share on other sites More sharing options...
SteveRK Posted January 8, 2009 Share Posted January 8, 2009 If there is no silencer involved and the end of the pipe rusted away after only 5 years its down to the structure of the steel used as i am assuming it was also very scabby with rust on the outside surface. Quote Link to comment Share on other sites More sharing options...
landrovermanuk Posted January 9, 2009 Author Share Posted January 9, 2009 I didn't realise you could get stainless systems so cheap...I'll have to look in to it......The pipe is in good condition except where the weld on end piece was and the hole near the weld on flange at the other end. The rest is still a dull silver with no other scabs.....Thanks Quote Link to comment Share on other sites More sharing options...
Les Henson Posted January 9, 2009 Share Posted January 9, 2009 A lot of exhaust silencers come with a drain hole in them anyway nowadays - especially rear silencers for petrol engines. Les. Quote Link to comment Share on other sites More sharing options...
Lara Posted January 9, 2009 Share Posted January 9, 2009 I didn't realise you could get stainless systems so cheap... you can www.rimmerbros.co.uk Lara Quote Link to comment Share on other sites More sharing options...
landrovermanuk Posted January 9, 2009 Author Share Posted January 9, 2009 Thanks for all your replies...I think for now I'll just spray the pipe as I need to get it on for the mot. I'll then save up for a SS sports system with tubular manifolds for a bit more poke...Cheers Quote Link to comment Share on other sites More sharing options...
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