Ask Honest John

Most recently answered technical issues questions
I just bought a Corsa 1.2SXI. I have been driving it now for 3 weeks and it has just started to make a tapping noise very much like a diesel. I have changed the oil and filter (the oil was dirty and the...
In March 2009 I bought a used Jaguar XF, previously owned by Jaguar, Brown’s Lane, Coventry. On 31-12-2009 at 39,000 miles, it suffered catastrophic engine failure. The car started to speed up without...
You have mentioned several times that its a good idea to let a turbodiesel cool down before switching off after a long run. I recently bought a Skoda Yeti 2.0TDI CR and I notice that the fan sometimes...
My oil light came on in my 2002 Vauxhall Corsa 2002 yesterday. When I pulled over to check the oil the whole of the underside of the bonnet and engine was covered in oil. I filled it up with oil to enable...
I am about to buy a Ford Focus Zetec 2001 1.6-litre. I am still not sure about few things. When checking the MOT papers, I noticed that the CO2 emissions levels doubled between the last 2 MOT results....
My Citroen C5 2.2 HDi 2001 model's air conditioning blows hot air on the passenger side and cold air on the driver's side when the temperature is set at low on both sides. Any ideas?
The water pump on my 2.2 petrol Vectra C 2003 model was replaced by my local Vauxhall dealer at 56,000 miles due to a water leak. The first replacement was noisy, with a high-pitched sound when revving...
I seem to have a problem with my recent Volkswagen Jetta purchase. When engaging first gear and reverse there seems to be a judder. Volkswagen has fitted a new clutch under warranty but it seems to have...
I've got a Rover 25 1.4i L 2002 model. Just recently it started to judder - it's fine after it's been running a while, especially after a long journey. It only really happens when I change gear and start...
You have mentioned in the CBCB a problem with the Toyota Avensis VVT-i engine suffering high oil consumption due to a bore liner problem and/or being fitted with slightly undersize pistons. Do you know...