MOt question, engine swappage

[Stuart]

Whats the score with the MOT emissions test if you put an engine that dosent "need" a cat (age wise) into a car that is in the right age for a CAT test? (or even if you cant prove the age of the engine by whatever means)

[General Baxter]

how well do you know the mot man

good enough to slip him one ?

[GDN16v]

good enough to slip him one ?

If he's that way inclined!lol:p

Dont they take it of what ever is newest if you cant prove other wise!:confused:

[let_nova]

they take it from what ever is oldest. i had the problem when i took the the old XE. engine was 1990 and the car was 1992 after cat. me and the mot ,man went through the book and tells you exactly that its whatever is oldest. i told him that the engine was older. he didnt question it. and i wasnt friends or anything with him

[let_nova]

anyway lol whats the crack with the blue font!?

[Stuart]

typed in outlook in an email as the boss was stood behind me lol

[let_nova]

ah i see. hope that helps anyway.

[greg1.4]

mmm, i was told it depends on what engine it is, doesnt matter about age of car..

[projctnova]

yea ive been told its if the engine needs a cat you have to have one.

wonder if it works putting a new engine in an old car? like vxr novas? surely it would be the opposite of that

[let_nova]

its only the age that matters.

example:cars 1993 engines 1991. you wont need a cat.

engines 1993 cars 1991. you still wont need a cat.

both 1993 you WILL need a cat.

with reg to PROVING its before cat you can get a ""headed letter" engineers report to say that the date is pre 1992.

[General Baxter]

yea ive been told its if the engine needs a cat you have to have one.

mine dont have a cat :thumb:

[let_nova]

yea ive been told its if the engine needs a cat you have to have one.

wonder if it works putting a new engine in an old car? like vxr novas? surely it would be the opposite of that

with reg to the "vxr nova" it will go by the nova as thats the oldest.

[Jack]

As said, it goes on whichever is older - engine or car. Obviously the engine is harder to prove the age of than the car.

My Celica passed emissions with a decat as well btw :d (I don't think it would now mind, as the ECU has gone a bit scatty and it throws most of the fuel straight out the exhaust lol)

You can also go for the kitcar angle, depending on what engine you're fitting to what car.

[let_nova]

if its a vaux open the oil cap and see the date stamped on the cam carrier hoping that its pre 1992 lol

[Adam]

mine dont have a cat :thumb:
Indeed, its a g-plate car.


As said its whichever is oldest.

My XE is a cat engine, but in my 1985 shell it obviously doesnt need a cat

[Mark Sparks]

Mot tester.
Right here goes if you have a 1992 car yue dont need a cat.
rules and regs
1986 - 1992 1st used before 1st of august 1992 limits co 3.50 hc 1200
1992 - 1995 1st used before 1st of august 1995 limits co 0.30 hc 200 But if the engine code could not match on the emission machiane the limits changes to co 3.50 hc 1200. The reson for this is the jap imports they didnt change emissions law over there so there cars could not pass so we had to change our law.
cars after 1995 1st used after 1995 limist co 0.20 hc 200 againe if match is not found or manufachers could not get that low then co 0.30 hc 200

[Stuart]

and if its post 1995, no engine match, wont pass 0.2 or 0.3 does it goto 3.5?

[Mark Sparks]

and if its post 1995, no engine match, wont pass 0.2 or 0.3 does it goto 3.5? yeah mate if you read it again you might understand morelol

[Stuart]

so essentially, aslong as they cant match the engine to the car, it goes through on the "let everything pass" test :D WIN

[Mark Sparks]

so essentially, aslong as they cant match the engine to the car, it goes through on the "let everything pass" test :D WIN
Yeah pal:thumb:

[Stuart]

I think to prove I can do it, I'm going to keep the cat in and make the bastid ing thing make the power I want and also hit low emissions too (more to the point, means the Idle control will be spot on)

[MK999]

What car is this for?

[Jack]

But if the engine code could not match on the emission machiane
As in, engine number match the car? I'm not clear on that bit, you mean the machine has (or can access) a list of cars and engine numbers?

[MK999]

As in, engine number match the car? I'm not clear on that bit, you mean the machine has (or can access) a list of cars and engine numbers?

A list of engine numbers that originally came in the cars I believe, so a ZXXxxx engine wouldn't need a cat in theory if it was in a Nova. not 100% but fairly sure that's what he means.

[phazer]

It's not a list of engine numbers, it's a list of engine codes.

So a 93 Nova fitted with a C14SE needs a cat (never used to but they've updated the list).

A 93 Nova with a X16XE doesn't need a cat as there is no match on that model with that engine code.

VOSA confirmed all of this to me recently with my MOT shenanigans.

[djbrowney]

if its a vauxhall send them a letter with you engine number stating what you are doing and they will send you proff of the engine build year, mot center's cant argue with it an its so easy to write a letter lol !!!

[Stuart]

so all is good then. Love the system