FAO those that have fitted de-cats on a 172 . . .

[Riley!]

just a quick one to see whether or not i will need new nuts and bolts where the cat joins the manifold. its a ph 172 btw and has covered 38k on a 53 reg. Do they tend to be seized like fook? or are they re-usuable?

 

[Henry]

they're reusable if you don't chew them up trying to get them off (..)

 

[palingneus]

I re-used them, apply some molycoate threadpaste on them.
its a rotten job to do, and I removed it on a garagelift took me 1,5 hours and cuts on the knockles.

good luck ;-)

 

[franx]

^^ you dutch by any chance ? Paling-neus ?

 

[TooneySonic]

i've reused with no problems on both cars had it done to, one was 45k the other 40k

 

[sideways danny]

if it's not been changed before i'd get a gasket kit. rare to see a car come in that couldn't do with a new gasket. Sometimes they're so bad they cause a knock that people thing is engine mounts

 

[Icarus]

Seconded for the amount of arse ache the job is it's not worth not fitting a new gasket.

Cheers
M

 

[broster@JAM-Sport]

Id swap it if it was me.

 

[palingneus]

i am dutch yes sir ;-)

 

[palingneus]

I didn't have a gasket between the exhaustmanifold and the cat.
so I have no gasket now when I fitted the decat. no exhaustblowing here!