Bleaky Posted June 15, 2020 Share Posted June 15, 2020 Hello all,My SLR is loud! Before lockdown, I had it noise tested at Goodwood, in the hope of doing some trackdays. It made c. 105(+)dB, so is too loud for most tracks. It's on roller barrel throttle bodies.I've taken the silencer off and replaced the baffle and repacked it and am in the process of putting it back on the car.There was no exhaust paste sealing the manifold to the exhaust at the 4 into 1 union. Should there be? When I put it back on the car, it was blowing at this union- meaning I could feel the exhaust 'draft' around the union.Should I use exhaust sealing paste here? Will it help quieten it? I'm reluctant to use paste as it will make it much harder to disassemble in future.All advice is welcome!Many thanks.Dave Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted June 15, 2020 Share Posted June 15, 2020 Use exhaust silicone as opposed to paste, lambda sensor safe high temp copper stuff such as this: https://www.amazon.co.uk/Permatex-Copper-Silicone-Gasket-81878/dp/B0002UEOPA (should be able to find it in a motor factors cheaper than this Amazon listing, though).I've used it on all my exhaust connections from the 4-1 to the silencer, it is flexible and doesn't harden like the paste, so removal is easy to do a re-pack. Link to comment Share on other sites More sharing options...
Bleaky Posted June 16, 2020 Author Share Posted June 16, 2020 Wonderful James, Thank you. I found it cheaper on eBay. Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted June 20, 2020 Area Representative Share Posted June 20, 2020 https://www.halfords.com/tools/garage-equipment/head-gasket-and-exhaust-repairs/loctite-5990-premium-silicone-copper-gasket-maker%2Fsealant-599712.html£6 a tube plus 10% club discount. Link to comment Share on other sites More sharing options...
Area Representative Andrew Gilbert Posted June 22, 2020 Area Representative Share Posted June 22, 2020 you'll probably find that the RB's will be a big contributing factor to your noise issue as well Link to comment Share on other sites More sharing options...
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