https://wiki.seloc.org/api.php?action=feedcontributions&feedformat=atom&user=DC 2026-04-06T19:07:53Z User contributions MediaWiki 1.45.3 https://wiki.seloc.org/index.php?title=Change_a_CAT&diff=7323 2008-08-02T19:54:18Z

<p>DC: </p> <hr /> <div>#[[Remove the rear undertray|Diffuser off (Rearmost part of the undertray)]]<br /> #Soak cat nuts in penetrating oil for a few days before hand. Undo nuts from Cat. (15MM), use Loctite Freeze and Release to break the nuts free of rust etc. It really does work.<br /> #Cut off those that won't move, swear profusely.<br /> #Wiggle the Cat, silencer and flexi until it all comes apart (If necessary remove rubber mount from the flexi)<br /> #Offer up CRP and fit the new stainless steel bolts in place not forgetting the gaskets<br /> #Tighten the new stainless steel nuts progressively as your CRP may not be an exact fit<br /> #Find gaskets on the floor undo the bolts and refit corectly<br /> #Refit diffuser<br /> <br /> Job is a carrot, first time will take hours as the bolts are all rusted, second time is a doddle. <br /> While the cat is off press out the studs with a vice and a suitable socket, makes things easier next time.<br /> <br /> Note that some grades of SS bolts may seize over time with the extreme temperatures; the only way to remove them is to apply pressure until they shear, then they will need to be renewed (removal will be necessary once a year for MOT if you are fitting a CRP). If fitting a CRP, normal steel bolts will be fine as the constant removal-refitting is enough to keep them from rusting up. <br /> <br /> The use of copper grease can help prevent seizure.<br /> <br /> [[Category:Exhaust]]<br /> [[Category:DIY]]<br /> [[Category:Lotus Elise]]<br /> [[Category:S1]]<br /> [[Category:S2]]</div>

DC