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Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: Steve Burnett on March 10, 2005, 10:49:47 PM

Title: Fitting a replacement CAT pipe
Post by: Steve Burnett on March 10, 2005, 10:49:47 PM
Can someone please tell me what to look out for when replaceing the midpipe CAT with a CAT replacement midpipe? Sensors etc???
I have removed the back box no problem and was wondering about the CAT removal. Is there any gaskets in the downpipe to midpipe???

Please help, Id like to do it this weekend.
Title: Fitting a replacement CAT pipe
Post by: rx7veilside on March 11, 2005, 05:45:12 AM
2 gaskets one for each end of the midpipe..hope u have a reasonable rear box as mine is a single with decat and apexi n1 and can still wake the dead
Title: Fitting a replacement CAT pipe
Post by: Donato on March 11, 2005, 09:23:45 AM
Hi steve, there is a cat heat sensor, once you remove it, make sure you insulate it with electrical tape and fix it to the underside. If you dont it could short against the body and cause the heat light to come on, if you ar efitting the apexi this now becomes the knock warning light...

If you cannot get gaskets then a good smear of gun gum will do the job fine, i have had gun gum on mine since the rebuild with no leaks..

The other thing to look out for is bloody tight rusty bolts! :p

Cheers

Donato
Title: Fitting a replacement CAT pipe
Post by: gavin on March 11, 2005, 07:41:10 PM
just fitted my cat pipe yesterday easy job, i sprayed all the nuts with wd40 and let them soak a bit, i then put one of my feet on the exhaust and pulled like hell on the ratchet till they come loose, re used the old gaskets with a little paste, job done havent tryed it yet waiting on ecu and some other parts, i got the pipe from DRAGON £100 + vat perfect fit :D along with there service kit, didnt want the cat pipe thats on ebay as they have no mounting brackets,
Title: Fitting a replacement CAT pipe
Post by: Steve Burnett on March 11, 2005, 08:28:09 PM
Ross was kind enough to lend me a CAT replacement pipe as a favour.
The pipe is just being fitted on a temp basis, to see if it gets rid of my flashing heat light. I don\'t have a PFC so it won\'t be on long.
I\'ll get it fitted next week, tomorrow im going snowboarding!!
Title: Fitting a replacement CAT pipe
Post by: gavin on March 11, 2005, 10:38:55 PM
im going to keep the air pump at the moment, do i have to disconect it so it stops working? :)
Title: Fitting a replacement CAT pipe
Post by: jonrx7uk on March 15, 2005, 10:10:59 AM
No need to  disconect the Air pump.  The car will run smoother with it connected (fuel mixture at idle is affected).  Just let the pipe that went to the cat vent off under the car.  There is only fresh air coming from it anyway...

Cheers
jon
Title: Fitting a replacement CAT pipe
Post by: gavin on March 15, 2005, 01:29:24 PM
thanks will leave all as it was

Gavin :)
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