dannymccann
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Registered: 9th Aug 06
Location: Doddington, Lincolnshire
User status: Offline
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Ive been reading round and apparently for the smoke test the engine is revved from idle to redline a maximum of 6 times
It says this test 'should not do any damage to a well maintained engine'.
Now as far as I know its been maintained as it should be, I dont much like the prospect of some numpty in a garage ragging the shit out of my motor, considering I never go above 3.5/4k...... I assume if you refuse to allow this to happen your car cannot pass the MOT?
What happens when you allow them to have fun with your loud pedal, that the engine DOES break? What sort of comeback do you have???
edit - http://www.vosa.gov.uk/vosacorp/repository/Diesel%20Smoke%20Test%20-%20Info%20Card.pdf
[Edited on 24-01-2009 by dannymccann]
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Mertin
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Registered: 12th Oct 05
Location: Scotland
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I did my work experience at a garage a few years ago and never saw this happen? Unless its changed
Emissions etc are usually done at a set rpm
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XE luke
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Registered: 4th Apr 08
Location: doncaster s. yorkshire
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id ask to do that bit yourself
i mot'd my car yesterday and the tester was great
i sat in the car and revved it as he asked while he did emissions test
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XE luke
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Registered: 4th Apr 08
Location: doncaster s. yorkshire
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i only had to rev to 2krpm for around 30 secs that was on a 1.6 petrol
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mattk
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Registered: 27th Feb 06
Location: St. Helens
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im concerned too, only ever took mine to 4k dont want some monkey taking it the limiter, especially from cold
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Joe
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Registered: 20th Jun 04
Location: Hesketh Bank, Lancashire
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Some people worry far too much.
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dannymccann
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Registered: 9th Aug 06
Location: Doddington, Lincolnshire
User status: Offline
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It wont be taken there from cold, ive updated the original post with VOSA link ^^
Joe, id still rather the engine not be ragged to an inch of its life, just for the stupid MOT test
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Joe
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Registered: 20th Jun 04
Location: Hesketh Bank, Lancashire
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Its not within an inch of its life though. It says a maximum of 6 times, so they might only do it a couple of times. Why is your engine suddenly going to break when it gets revved a couple of times?
Looks like you'll just have to make do without an MOT then.
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dannymccann
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Registered: 9th Aug 06
Location: Doddington, Lincolnshire
User status: Offline
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I just dont see why it need to be revved right up to the line, they dont do that on petrol cars?
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Joe
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Registered: 20th Jun 04
Location: Hesketh Bank, Lancashire
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Because its a smoke test, an engine doesn't really smoke on idle? and generally petrol engines don't smoke that much?
Make sure they don't check your lights too, just incase a bulb blows.
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dannymccann
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Registered: 9th Aug 06
Location: Doddington, Lincolnshire
User status: Offline
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Bonney
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Registered: 14th Nov 04
Location: St Helens
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If your worried about your car going to the redline once, I would seriously think of getting rid of it and getting a new one. The rev limiter on the car is set so it will not do any damage to the car, nothing at all to worry about.
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John
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Registered: 30th Jun 03
User status: Offline
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It won't do any damage to the engine even from cold, the engines are designed to be driven like that by people who don't have a clue anyway.
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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quote:
Originally posted by Joe
Because its a smoke test, an engine doesn't really smoke on idle? and generally petrol engines don't smoke that much?
Make sure they don't check your lights too, just incase a bulb blows.
i actually laughed, out, loud at that!
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Tommy L
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Registered: 21st Aug 06
Location: Northampton Drives: Audi wagon
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 Engine is going to break if revved 6 times to an inch of its life
[Edited on 24-01-2009 by corsa_tomtom]
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Eck
Premium Member
Registered: 17th Apr 06
Location: Lundin Links, Fife
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It's called a limiter for a reason. It'll be reet.
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John
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Registered: 30th Jun 03
User status: Offline
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Also, unless it's the first mot it'll have had it done and survived already.
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Marshall
Member
Registered: 10th Nov 05
Location: Boston, Lincs Drives: 1.4 Sport & 2.2 astra
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the test for petrol engine mesures the emissions at idle and about 3000rpm
the diesel test just involevs measuring the smoke opacity from idle to limiter.
Also diesel dont bounce off the limiter like a petrol. I controlled by a governor in the high pressure pump. so, if anything it should be safer for a diesel to be at the limiter.
theres also a fast pass route, so if first rev is very good, then they only do it the once.
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Rob_Lee
Banned
Registered: 9th Dec 05
Location: Folkestone Drives: Nova 1.6 16v
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This is only on diesels so stop worrying!
Its revved to the limiter for smoke test and emmisions
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
User status: Offline
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Jesus some people worry too much!
I give mine some lmiited death every now and again (sometimes on purpose, sometimes not!)
Theyre gunna do it, if the car is well looked after it'll be fine.
5k is the limiter to stop breaking, not the breaking point 
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