Ask Honest John

Most recently answered maintenance questions
My 76-year-old Jeep has leaf springs all round. Should these be lubricated between the leaves or left dry and what is the best way to extend their life?
Which spark plugs are best for my 2003 Volvo V70 2.4 petrol?
I have just bought a new Audi Q3 1.4 TSFI. I have not owned a turbo car before and understand that you should let the car idle for a while before switching off following certain driving conditions. Please...
The battery on my Opel Omega has run down even though it's just been parked up. What's the cause?
My Vauxhall Vectra has started kicking out LOTS of white smoke. Then nothing for days and then smoke again. The water level is dropping slowly but performance is all good - the engine temp has always been...
We have a couple of 1950s classic cars. At the onset of salted roads, in the past we filled the cars up with petrol, over inflated the tyres and kept the batteries trickle charged. This spring neither...
I have a Kia Sportage with a turbo petrol engine. Are there any special precautions on stopping and starting the engine that I should take? And any maintenance processes that should be carried out to preserve...
How do I clean the air conditioning to remove bad odours?
I bought an immaculate Volvo 245 two years ago and have been gradually working through glitches. It went through its MoT two weeks ago with no advisories. I've had 240s in the past with no steering problems....
Why does the temperature of the oil in my Volkswagen Touran keep rising when I am driving?