Difference between revisions of "Change a CAT"
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| − | + | #[[Remove the rear undertray|Diffuser off (Rearmost part of the undertray)]] | |
| − | + | #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. | |
| − | + | #Cut off those that won't move, swear profusely. | |
| − | + | #Wiggle the Cat, silencer and flexi until it all comes apart (If nessecary remove rubber mount from the flexi) | |
| − | + | #Offer up CRP and fit the new stainless steel bolts in place not forgetting the gaskets | |
| − | + | #Tighten the new stainless steel nuts progressively as your CRP may not be an exact fit | |
| − | + | #Find gaskets on the floor undo the bolts and refit corectly | |
| − | + | #Refit diffuser | |
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Job is a carrot, first time will take hours as the bolts are all ruted, second time is a doddle. | Job is a carrot, first time will take hours as the bolts are all ruted, second time is a doddle. | ||
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The use of copper grease can help prevent seizure. | The use of copper grease can help prevent seizure. | ||
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| + | [[Category:Exhaust]] | ||
| + | [[Category:DIY]] | ||
Revision as of 16:45, 4 September 2006
- Diffuser off (Rearmost part of the undertray)
- 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.
- Cut off those that won't move, swear profusely.
- Wiggle the Cat, silencer and flexi until it all comes apart (If nessecary remove rubber mount from the flexi)
- Offer up CRP and fit the new stainless steel bolts in place not forgetting the gaskets
- Tighten the new stainless steel nuts progressively as your CRP may not be an exact fit
- Find gaskets on the floor undo the bolts and refit corectly
- Refit diffuser
Job is a carrot, first time will take hours as the bolts are all ruted, second time is a doddle. While the cat is off press out the studs with a vice and a suitable socket, makes things easier next time.
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.
The use of copper grease can help prevent seizure.