Advertisement

Upgrade the cab heater blower on your series III

Series III heater blower casings corrode badly, reducing efficiency which was never good in the first place. Gary Stretton has a solution.

The tendency with Series III heater blower efficiency is for it to fall somewhere between useless and adequate, depending whether all components are functioning correctly. Importantly, the lower dash vents and hoses can hemorrhage airflow if the seals and flaps are not in perfect order.

The heater matrix, being an independent unit from the blower fan, should be treated as such and dealt with separately. Fitting an uprated heater matrix, along with improved airflow to improve heat output is easy enough, although wonders can be worked by flushing and cleaning a standard matrix.

Advertisement - Article continues below

Mine was treated to two overnight doses of a gel-type household lime-scale remover and vigorous flushing with a hose. The debris that was removed looked like tagliatelle, but the resulting heat output was nothing short of a revelation. 

Certainly, the coolant side of the heating system needs to be in good order to take advantage of the uprated blower. Whether single or twin speed, Smiths complete blower units are becoming expensive to repair or replace, assuming a good replacement can be found, though the motor alone is available for around £70.

So that was my challenge: to find a modern blower unit offering more oomph than the original. I gave up looking around scrapyard cars because modern blowers are buried deep in the nether regions of dashboards. 

Then I stumbled across SPAL Automotive UK who, I discovered, created the original snail blower design that was adopted by Land Rover and many others. The range is extensive, but my criteria wasn’t – I wanted a compact blower with improved output and more than two speeds, if possible. Having spoken with SPAL, I was advised their 008-A100-93D would be the best solution because the motor is IP68 rated, meaning it’s a waterproof, dust-proof unit – and it has three speeds.

Advertisement - Article continues below

All I had to do was create the mounting bracket. Approximate costs were: blower £75, joining sleeves £10.27 (pair),  82mm ducting x 1 m £19.31, 18 SWG galvanised steel offcuts £2 to £5 each, Maplin switch £3.99. This feature shows how I installed the unit but, even if you don’t take this route (there are many alternative methods of upgrading the system), I hope it helps you to create your own solution to improve a Series III’s hot air demisting and cold air ventilation and, of course, to provide a warm cab for the winter, all via an efficient airflow.

Tools: General workshop kit, metal shears, angle grinder with thin cutting disc, files, drill and bits, multimeter, wiring, hot air gun, bench vice or metal folder.

Contact:Thanks to SPAL Automotivewww.spalautomotive.co.uk Tel. 01905 613 714Revotec www.revotec.com Tel. 01491 824424

Health and safety

• Ensure wires are correctly connected to prevent permanent damage to the resistor or motor. • Once fitted, double-check all wiring before reconnecting the battery and switching the fan on. • Beware of sharp edges when cutting and forming metal brackets. • Wear eye protection from swarf when drilling.

Click on the gallery below for our handy step-by-step guide…

Advertisement
Advertisement

Recommended

Visit/news/351999/jaguar-land-rover-make-protective-visors-nhs
News

Jaguar Land Rover to make protective visors for NHS

3D printers at Jaguar Land Rover’s prototype building facility in Gaydon will be used to produce protective visors for NHS workers
3 Apr 2020
Visit/jaguar/109167/new-jaguar-land-rover-project-vector-showcases-autonomous-future
Jaguar Land Rover Project Vector - front
Jaguar

New JLR Project Vector showcases autonomous future

The new JLR Project Vector autonomous pod sits on a new platform and is scheduled for on-road trials before the end of 2021
18 Feb 2020
Visit/land-rover/108061/what-is-land-rover-incontrol
Land Rover Discovery 2017 - official incontrol touch pro
Land Rover

What is Land Rover InControl?

Here’s everything you need to know about Land Rover’s InControl infotainment system
11 Feb 2020
Visit/jaguar/108971/the-jlr-management-merry-go-round-is-up-and-running
OPINION Sir Ralph Speth
Jaguar

'The JLR management merry-go-round is up and running'

With JLR CEO Sir Ralph Speth retiring, Steve Fowler looks at who in the automotive industry looks set to replace him
5 Feb 2020

Most Popular

Visit/mazda/mx-5/352010/new-mazda-mx-5-2020-review
Mazda MX-5

New Mazda MX-5 2020 review

The popular Mazda MX-5 has been updated for 2020, but with the changes comes a jump in price
5 Apr 2020
Visit/car-group-tests/352006/kia-soul-ev-vs-mg-zs-ev
Car group tests

Kia Soul EV vs MG ZS EV

The second-generation Kia Soul EV faces the value-for-money MG ZS EV in an SUV shootout
4 Apr 2020
Visit/dacia/109132/new-dacia-spring-electric-confirmed-arrive-next-year
Dacia

New Dacia Spring Electric confirmed to arrive next year

Bosses confirm the new Dacia Spring Electric will arrive in showrooms next year and set to become Europe's cheapest electric car.
7 Apr 2020