What does this mean on the nct checklist?

shmux

I have my nct in a couple of weeks but don't quite understand this point (5). Can someone explain...

The engine is in a fit state to be tested e.g. cam belt / timing belt. You will be asked to sign a disclaimer at the test centre.

Happy121

shmux wrote: »

I have my nct in a couple of weeks but don't quite understand this point (5). Can someone explain...

The engine is in a fit state to be tested e.g. cam belt / timing belt. You will be asked to sign a disclaimer at the test centre.

Basically, they want you to bring a car that is capable of making it through the test without breaking down. They only ask you to sign it if you have an old vehicle that they fear may not make it through the test. They do not want you to bring a car that is making funny noises and sounds like it will die any minute.

shmux

thanks

stevenmu

And it's mainly just to cover their own asses so if it does break down during the test you can't blame them.

jmck87

Get this get this....they force you to take the test, make you pay for the test, rev the crap out of your car, and then say sorry but its your loss.

What a business....I want in!

Seth Brundle

jmck87 wrote: »

Get this get this....they force you to take the test, make you pay for the test, rev the crap out of your car, and then say sorry but its your loss.

What a business....I want in!

Anytime I have been at an NCT test, they didn't rev it beyond the normal rev range.

voxpop

On the smoke test - they are supposed to red-line it.

Our man in Havana

Not at all. That is crazy talk.

Nonoperational

voxpop wrote: »

On the smoke test - they are supposed to red-line it.

Am no, the high idle is done around 3k rpm as far as I recall.

DannyBuoy

gpf101 wrote: »

Am no, the high idle is done around 3k rpm as far as I recall.

That’s the petrol engine emission test, the diesel test is done by bringing the engine speed to governor rpm, which is the speed the engine will reach before it's limiting system stops it revving any higher.

Black_Knight

Yeah, the bastards revved the balls out of my car (red lining it). Diesel. Nothing compared to the car before mine, the owner did not look the happy camper.

I had to sign one of those "fit for the test" forms. He said they do it for all diesel cars. Mines an '05 so its not just the old cars.

Seth Brundle

Well shouldn't the engine be able to reach those speeds? Would you rather find out that the belt is about to snap when reaching those speeds mid way through an overtaking manouvre?

ScouseMouse

Particularly on diesels with a timing belt, if it snaps while being revved, you will probably lose the engine, so the disclaimer covers their arses.

voxpop

From the nct manual itself:

Check visually that the emission control system is complete and properly connected and that there are no leaks
in the exhaust system.
2. With the engine at normal operating temperature, raise the engine speed slowly to 2,500 r.p.m. or half the engine
manufacturer’s recommended governed speed whichever is less and hold for 20 seconds in order to purge the
exhaust system. If the engine emits any unusual noises the test should be abandoned. Slowly raise the engine
speed to its maximum r.p.m. and note if the governor operates within the vehicle manufacturers’ recommended
R.P.M. setting. If not the test should be discontinued. Do not hold the engine at maximum r.p.m. for any
length of time.
3. Connect the diesel smoke meter to the vehicle following the smoke meter manufacturers’ instructions. Depress
the accelerator pedal firmly from the idling position to the maximum fuel delivery position following the prompts
of the smoke meter. The smoke meter is programmed to ignore the first reading. The operation is repeated and
if the reading on this occasion is less than 60% of the acceptable limit the test is ended. If the reading is not less
than 60% of the acceptable limit, the operation is repeated. If the average of this and the previous reading is
within the acceptable limit the test is ended. If the average readings are not within the limits the operation is
repeated up to a maximum of 3 more times taking the average of the last 2 readings after which the test is ended.

I had my own car done on sat(nct) and the guy revved the sh1te out of it 3 or 4 times during the test.


Its not so bad on a car that pushed abit every now and again - but its probably not great for a diesel that spends its life pottering around town at low revs.

Anan1

voxpop wrote: »

Its not so bad on a car that pushed abit every now and again - but its probably not great for a diesel that spends its life pottering around town at low revs.

I don't think any engine that can't safely be revved to the redline should be on the road, TBH.

furtzy

They revved the crap out of mine...its a diesel. Also remember to check your oil level before hand. They said mine was slightly over the dip stick level and refused to test it . I had to arrange another test luckily it was later that day after I had drained a little bit of oil out

voxpop

Anan1 wrote: »

I don't think any engine that can't safely be revved to the redline should be on the road, TBH.

I dont know - thats a very black and white world you live in. The smoke test may not "break" a car but it might exacerbate a small problem, turning it into a big problem. There are plenty of old diesel cars that are babied by their owners because they use oil or whatever - these cars may live a happy life,being driven carefully by their owners. These cars are not a hazard on the road.
But taking these cars to the NCT to have them revved a few times into the red - stressing the engine - could lead to a fault arising after the NCT, which would never have happened otherwise.

The smoke test itself is not to check if the engine can be safely redlined. Revving to the redline is just a by-product of doing an emissions test. If they could do the smoke-test without redlining the car, would the car be less safe?

voxpop

furtzy wrote: »

They revved the crap out of mine...its a diesel. Also remember to check your oil level before hand. They said mine was slightly over the dip stick level and refused to test it . I had to arrange another test luckily it was later that day after I had drained a little bit of oil out

#


They did you a bit of a favour there - overfilling the oil can be as bad for the engine as under filling.

Anan1

voxpop wrote: »

I dont know - thats a very black and white world you live in. The smoke test may not "break" a car but it might exacerbate a small problem, turning it into a big problem. There are plenty of old diesel cars that are babied by their owners because they use oil or whatever - these cars may live a happy life,being driven carefully by their owners. These cars are not a hazard on the road.
But taking these cars to the NCT to have them revved a few times into the red - stressing the engine - could lead to a fault arising after the NCT, which would never have happened otherwise.

The smoke test itself is not to check if the engine can be safely redlined. Revving to the redline is just a by-product of doing an emissions test. If they could do the smoke-test without redlining the car, would the car be less safe?

I suppose that's a fair point. Although such engines are probably living on borrowed time anyway.

furtzy

voxpop wrote: »

#


They did you a bit of a favour there - overfilling the oil can be as bad for the engine as under filling.

I agree. I only got it serviced before the test. Won't be going back there for a service

thomas mckeown

hi i have a pougeot 206 1.1 it failed the nct on a insecure ball joints wat dus it mean

mickdw

thomas mckeown wrote: »

hi i have a pougeot 206 1.1 it failed the nct on a insecure ball joints wat dus it mean

Basically, a connector that attaches your wheel assembly to your suspension.
They are worn and if they fail in use, your wheel will collapse. Not something you want to happen.

visual

When reving the engine to max is this to the max the engine will rev to or to the red line. ?

My understanding is reving a engine in the red isnt recommend by all manufacturers as the engine is running out side its designed tolerances and likely to cause damaged.

Alanstrainor

Please don't drag up old threads. Just start a new one.