I am required to submit my car for an MOT test before the usual 3 year time, because it is used for private hire.
So: it is a 17 month old MB 320 CDI diesel with 45,000 on the clock. I am told it will be revved to max. governed revs. up to 10 times to get the acceptable readings - I am also told I should make sure the cam belt/chain is in good nick ( sounds ominous).
What else should I do? Should I decline their very kind offer to rev. my engine, possibly to destruction? I would appreciate any help or advice.
Regards, Don
|
We have two diesel cars and none of them have gone through this ridiculous revving imposed by the MOT.
It really depends if you have a relationship with the place you get it done. The man who did ours at a local garage never did this as he said "if I damage a customers engine even though I wouldn't be responsible I would feel so".
He retired and the next owner when I asked if he could miss out on this said "I never rev them as specified but just enough to get a satisfactory reading" this he did with a couple of gentle revs.
There was a huge amount of critisicm when this revving test for disels was first initiated and for a while it was suspended but later reinstated.
I should ask around before getting it done.
alvin
|
Thanks Alvin, unfortunately, because the car is used and licenced for private hire ("minicab"), the local council specifies where the car must be tested. I hope the tester may show some mechanical sympathy, otherwise I may refuse to have the engine tested in the manner specified and see what the authorities do about it.
Don
|
|
|
Don't worry about it. Unless the engine is knackered anyway, nothing wrong in revving to the governer. That's what industrial engines do all day, every day.
|
Just make sure you take it for a good Italian Tune-Up to get the oil up to working temp and all the cr*p out of the zorst beforehand.
If only everything in life was as reliable as a Volkswagen.
communities.msn.com/honestjohn
|
|
If only VWs were reliable
|
|
|
|
|
It's what I do with my Escort every day.
|
|
I'm with Alvin on this one. A vehicle engine revving to the max in neutral is not the same as revving to the max against a load whether an industrial engine or actual driving on the highway. What is the test supposed to prove anyway ? How much soot can be dislodged is my guess. If you have a choice of test centres, go for the smallest privately owned and definitely not a government establishment.
|
|
The whole principle of the emissions test is flawed. On the road you never rev an engine in neutral. As it is aimed at emission control in town a better test would be to check the emissions when idling.
|
|
|
|
|
