What’s the best way to bleed brakes?
Bleeding brake and clutch hydraulic circuits, especially when you're working on your own, is a lot less hassle when you use low-pressure air. Martynn Randall explains...
MartynnsTips Tips and Tutorials Archive
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Get yourself ready for the first motorcycle ride of spring
Has it been a few months since you last rode your bike? Haynes expert Martynn Randall explains how to get ready for that first ride.
How the DIY mechanic’s toolkit has evolved
As cars become ever-more complex, a home mechanic's toolbox must evolve to keep up. Haynes expert Martynn Randall gives the lowdown on what tools are essential...
Best OBD Scanner 2025: the best fault code readers tested
What's an OBD reader and why should you buy one? We've reviewed eight OBD scanners to see which offers the best balance of features versus price...
Does diesel have a future?
The latest SMMT sales data for 2024 gives a stark reminder of diesel's demise, but Haynes expert Martynn Randall says it's still the right fuel for some people...
Are winter tyres worth it?
Should you buy winter tyres? Are they the same as ice tyres? Can you use winter rubber in summer? Martynn Randall reveals all.
Driving through water: is it safe to do so?
What's the best way to get through floodwater and make it to the other side? Martynn shares his stories and has some tips to help you get home with dry feet...
Can you drive a hybrid car with a flat battery?
At some point, all batteries will go flat, but it's more of a problem when that battery powers your car's hybrid system. Haynes' Martynn Randall investigates...
Are wet timing belts a bad idea?
The wet cambelt is a comparatively new technical direction, but is it the right one to go in? Haynes' Martynn Randall has doubts...
Will my car battery die in cold weather?
Winter will always test a car battery's mettle, what with low temperatures and the extra demand of heated seats and screens. Martynn advises on how to keep your battery in the best of health...