The oil light - the most useless warning indicator ever
Posted: Fri 22 Aug, 2008 01.19
Got myself a new car a couple of weeks ago. By new I mean 12 years old, and nothing to shout about, just a Metro (the 3rd I've owned now) which I got for a few hundred as a cheap runabout. Been quite happy with it, especially now I have the 1.4 litre powerhouse version rather than the chronically underpowered 1.1 models I've had before. I should have done basic things like check the fluid levels but I didn't quite get around to it, the car appeared well serviced and ran like a dream so I didn't really give it too much thought.
A couple of nights ago, I was driving around and it seemed to be running a little bit too hot. The temperature gauge wasn't exactly off the scale, but it was hovering a little over the halfway mark which isn't normal. The problem quickly worsened and it kept hotting up. By the time I got home, the car was exhibiting the unmistakeable signs of an empty cooling system - the heater being stone cold with the temperature turned up full, and a worrying sound from the engine bay as steam escaped from the coolant tank.
I left it overnight, then filled the coolant up again to the brim the next day and tried again. All was well for a few miles till the same thing happened again.
Having more or less resigned myself to the fact that I'd bought a dud - the Rover K-Series engine is a cracking little power unit but it's aluminium construction unfortunately leaves it rather prone to the dreaded head gasket failure, classic symptoms of which are unexplained coolant system leaks.
I let the engine cool down and started it up again. Now it sounded rather nasty and tappety. Only at that point did I bother to check the oil - nothing registered on the dipstick. Adding 2 litres and allowing it to settle only barely got up to the minimum mark on the dipstick - my poor little engine had barely any oil which is why everything was overheating. In total I had to put in 3 and a bit litres to bring it up to the maximum mark. Now the cooling system isn't boiling so thats staying full too and everything is working fine.
Despite my little baby being pushed to the edge of destruction, the oil warning lamp never came on. The lamp works because it comes on when starting the car - the sensor simply isn't sensitive enough. I've heard people before warn that 'if the oil light comes on, it's too late'. What on earth then is the point of it? Surely the whole purpose of warning indicators is to advise you of a problem in plenty of time to allow you to deal with it, not wait until your car is fucked first.
...and that concludes today's not particularly interesting rant.
A couple of nights ago, I was driving around and it seemed to be running a little bit too hot. The temperature gauge wasn't exactly off the scale, but it was hovering a little over the halfway mark which isn't normal. The problem quickly worsened and it kept hotting up. By the time I got home, the car was exhibiting the unmistakeable signs of an empty cooling system - the heater being stone cold with the temperature turned up full, and a worrying sound from the engine bay as steam escaped from the coolant tank.
I left it overnight, then filled the coolant up again to the brim the next day and tried again. All was well for a few miles till the same thing happened again.
Having more or less resigned myself to the fact that I'd bought a dud - the Rover K-Series engine is a cracking little power unit but it's aluminium construction unfortunately leaves it rather prone to the dreaded head gasket failure, classic symptoms of which are unexplained coolant system leaks.
I let the engine cool down and started it up again. Now it sounded rather nasty and tappety. Only at that point did I bother to check the oil - nothing registered on the dipstick. Adding 2 litres and allowing it to settle only barely got up to the minimum mark on the dipstick - my poor little engine had barely any oil which is why everything was overheating. In total I had to put in 3 and a bit litres to bring it up to the maximum mark. Now the cooling system isn't boiling so thats staying full too and everything is working fine.
Despite my little baby being pushed to the edge of destruction, the oil warning lamp never came on. The lamp works because it comes on when starting the car - the sensor simply isn't sensitive enough. I've heard people before warn that 'if the oil light comes on, it's too late'. What on earth then is the point of it? Surely the whole purpose of warning indicators is to advise you of a problem in plenty of time to allow you to deal with it, not wait until your car is fucked first.
...and that concludes today's not particularly interesting rant.