All Things Mk5 > How to Guides / Troubleshooting

Sports cat blockage

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Ash_89:
Morning guys

Ive recently had a look inside my old sports cat with a bore scope , was just curious if anyone else has see this inside theirs ? (the cat was assumed blocked)
sorry for the shocking image i know you can only just make out the strange bits inside this was taken just before the bore scopes batterys died

image of turbo side of the cat honeycomb face
,

pudding:
Looks like your engine's been eating Marijuana!

The catalyst itself looks OK.  Fook knows what that green sh1t is, if not weed!

You can diagnose a bad cat with one of those infrared temp guns though.  The outlet temp should be a lot hotter than the inlet temp.  If the temp is the same at both ends of the cat, it's fooked.

Ash_89:
It has baffled alot of people mate haha , even miltek were confused as to what it actually is
to be fair i really need to get a better scope cam in there for some bright clear pics / videos
it was holding back nearly 30 bhp before i fitted a new downpipe ( pre stage 2+ at r-tech ) so its gotta be pretty bad .

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