Manifold question



  • hi lads,
    found a big hole of rust on my manifold,it aint gone right the way threw by the looks but it aint far off.
    whats the best manifold to fit and wheres the cheapest to buy them?
    and whats the best way to remove it with the engine in the car?
    you tell me and il do piccys for the forum.
    im guessing the bolts may snap to by the looks of them,whats best way to get them out with out damaging threads?

    thanks in advance



  • Make sure you use plenty of lube on the manifold bolts let them soak over night if possible.

    You can remove both manifolds from underneath the car, would be very awkward on ya back on the drive.

    I have some 6 branch manifold that were intended for a mazda 626. They are slightly longer under the car so i had to shorten my de-cat pipe. Got mine of e-bay, pretty sure you can get them from the US.

    Cheap hi-flow CAT
    http://cgi.ebay.com/ebaymotors/93-97-Mazda-Mx3-Mx6-323-626-High-Flow-Cat-Converter_W0QQitemZ180290168494QQcmdZViewItem?hash=item180290168494&_trkparms=72%3A727|39%3A1|65%3A12|240%3A1318&_trksid=p4506.c0.m245

    Couldn't find a manifold, you will have to just keep checking.

    I heat treated them thats why they are black.



  • hi mechanic,
    valleys got a de cat,just waiting for reply so i might smash 2 birds with 1 stone.
    do the mx6 and probes fit "tha manifold"?
    might have a look round scrappy,loads on ebay but all usa.

    going to be a on my back on the drive one mate,i got a strecher thing on wheels.

    might be able to do it when car goes in for a paint job as he has to paint inside of doors and they will be off the car,so i can get it up in the air.
    thats not a defo though and may just be a back job on the drive lol.

    are them bolts going to snap out you recon mate?



  • will have to speak to valley on price lol cuz ive offered more for a used one to him and that only gonna cost £25 to get here.

    is there 2 manifolds mate?as ive looked at mx6 and probe 1s from usa and the prices are for 2,
    is there other cats to?i was speaking to some one and they were saying that most v6s have another 2 cats by the down pipes or summert.

    thanks for that link mechanic :wink:



  • :? 2 manifolds - v6 engine, 2 banks of 3 cylinders, therefore 1 manifold per bank. There's only one cat.

    exhaust route is:

    manifold 1–--\Downpipe/Ypipe > cat > middle exhaust with silencer > backbox
    manifold 2----/

    The usa SS headers and y pipe are a bargain, I had mine sent over, took a while but it's a lot of metal for the money :)



  • @b2f52176cd=Marco:

    :? 2 manifolds - v6 engine, 2 banks of 3 cylinders, therefore 1 manifold per bank. There's only one cat.

    exhaust route is:

    manifold 1–--\Downpipe/Ypipe > cat > middle exhaust with silencer > backbox
    manifold 2----/

    The usa SS headers and y pipe are a bargain, I had mine sent over, took a while but it's a lot of metal for the money :)

    who did you use in usa marco?
    i may get my de cat from over there as there cheap,may just order the lot though.
    thanks for reply

    ps de cat question,my cars a k reg and defo registered in 92, am i 100% allowed a decat?i dont mind if not as il swap when it comes to mot time.
    thanks again



  • @896af9ca53=noluv:

    @896af9ca53=Marco:

    :? 2 manifolds - v6 engine, 2 banks of 3 cylinders, therefore 1 manifold per bank. There's only one cat.

    exhaust route is:

    manifold 1–--\Downpipe/Ypipe > cat > middle exhaust with silencer > backbox
    manifold 2----/

    The usa SS headers and y pipe are a bargain, I had mine sent over, took a while but it's a lot of metal for the money :)

    who did you use in usa marco?
    i may get my de cat from over there as there cheap,may just order the lot though.
    thanks for reply

    ps de cat question,my cars a k reg and defo registered in 92, am i 100% allowed a decat?i dont mind if not as il swap when it comes to mot time.
    thanks again

    When the vehicle is logged onto the MOT computer, the tester gets a vehicle report stating what emissions test is required.

    I have had some cars on a L-reg that dont require a CAT test due to them being built pre -emssions and not being sold that year and register the following.



  • @1894709725=Mechanic:

    @1894709725=noluv:

    @1894709725=Marco:

    :? 2 manifolds - v6 engine, 2 banks of 3 cylinders, therefore 1 manifold per bank. There's only one cat.

    exhaust route is:

    manifold 1–--\Downpipe/Ypipe > cat > middle exhaust with silencer > backbox
    manifold 2----/

    The usa SS headers and y pipe are a bargain, I had mine sent over, took a while but it's a lot of metal for the money :)

    who did you use in usa marco?
    i may get my de cat from over there as there cheap,may just order the lot though.
    thanks for reply

    ps de cat question,my cars a k reg and defo registered in 92, am i 100% allowed a decat?i dont mind if not as il swap when it comes to mot time.
    thanks again

    When the vehicle is logged onto the MOT computer, the tester gets a vehicle report stating what emissions test is required.

    I have had some cars on a L-reg that dont require a CAT test due to them being built pre -emssions and not being sold that year and register the following.

    thank you.
    would it be on my mot certificate or have any kind of code to say if it had to?
    i got the mot and a receipt kind of piece of papper with some pass results to certain stuff.
    im just wondering because i dont know weather to sell my cat or keep it for mot for just incasers.

    can you find out at work mechanic if i give you my reg?
    thanks



  • You should have a copy of the emmisions print out, can you take a picture and post it and i can tell you if it needs a CAT test.

    Mine has no CAT it went through the test ok and its a K plate.



  • @003b224c18=Mechanic:

    You should have a copy of the emmisions print out, can you take a picture and post it and i can tell you if it needs a CAT test.

    Mine has no CAT it went through the test ok and its a K plate.

    hi mate cant find wire for camera so going to write what it say.

    PROTECH
    FLUX 5000II

    INFRARED GAS ANALYSER

    ver. 9.06

    MOT Exhaust Emmisions
    Test results

    Basic Emissions Test

    tests station:
    62685
    there address

    engine temperature:
    manual observation of: temp gauge,cooling fan or coolant pipes
    –---------------------------------------------------
    limt value result
    fast idle test PASS

    engine speed[RPM]
    2500/3000 PASS
    co [%vol]
    <-0.20 0.14 PASS
    HC [ppm]
    <=00200 00036 PASS
    lambda
    0.97/1.03 1.00 PASS
    –---------------------
    natural idle test PASS
    engine speed [RPM]
    0450/1500 1098 PASS
    co [%vol]
    ,=0.30 0.01 PASS

    overall results
    exhaust emission test
    PASS
    tested by mr wolly of the wolly factory



  • test class is IV



  • That was a CAT test that your car took, it looks nice and clean. If you take your CAT off it might just get through but cant be sure. If you dont mind taking your CAT on and off for the MOT then i would do just that.

    They are easy to remove on the drive, make sure you use new nuts and bolts. So when you come to swap them over for its test it will be easier to do.

    Also dont use proper exhaust nuts or nylon thread ones, exhaust nuts are pinched to grab the thread better but they sometimes screw the thread and nylon just melt. I would suggest using spring washers instead.



  • ok mate,
    thanks again,hey just seen a piccy of you,you into your guns?
    im just waiting for a safe to apply for fac and shotgun,you been shooting long?
    atb



  • @7edb5e3896=Mechanic:

    That was a CAT test that your car took, it looks nice and clean. If you take your CAT off it might just get through but cant be sure. If you dont mind taking your CAT on and off for the MOT then i would do just that.

    They are easy to remove on the drive, make sure you use new nuts and bolts. So when you come to swap them over for its test it will be easier to do.

    Also dont use proper exhaust nuts or nylon thread ones, exhaust nuts are pinched to grab the thread better but they sometimes screw the thread and nylon just melt. I would suggest using spring washers instead.

    its getting me down,engines mint i know cuz its got full history from mazda with stupid amounts of money spent on it,its just the body work and my pals messin me about with getting it done.

    yea i will probly try take it in and if they say it needs the de cat just swap it,i know now not to just scrap the cat.

    is it possible,it did not need the cat test but they just put it threw?



  • There is a slim possiblity that they just stuck it through for a CAT test.

    Well i have been shooting for about 13 years now, started of on rifles then starting using shotguns about 4 years ago. Own 3 air rifles 2 hunting rifles and a shotgun.

    I live in the country not alot else to do other than shoot and drive fast lol.



  • @ed95abfb3f=Mechanic:

    I live in the country not alot else to do other than shoot and drive fast lol.

    lol that's awesome :D 2 things I love to do as well 8)



  • just found these, would they fit? expecting to cut the exhaust down.


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