Caterham checking out my Speedo problem

I gave a report update to Caterham UK (substantially what’s in my last post). They responded that “Engineering is investigating” as several others were complaining of the same problem. They said that they may have answers by next week.

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Erratic speedometer and warranty

If you have read through my blogs, you know that I have an intermittent speedo problem when the car gets warm/hot. So, as my 1 year warranty was about to expire, I contacted Caterham for assistance. They suggested a new speed sensor might do the trick, so they sent me one and I fitted it.

Its a trial & error process to get the right gap, so I recorded the settings with associated results. This time I used a feeler gauge to measure the gap.

Sensor                    Gap ”          Gap mm    Results


Initial setting     0.045″      1.143mm    Speedo works fine below 30mph, above 30 and speedo goes to zero.


out by 3/4 turn 0.067″      1.702mm   Speedo fails to register at any speed.


1 full turn in        0.037″     0.940mm   Speedo works fine below 65mph, above 65 and speedo goes erratic.

Indicator light ticking on & off cause speedo pertubations close to failure speed.


In 1/4 turn           0.027″    0,686mm    Appears to work at all speeds. However, on an extended drive, over 25 miles, speedo started going erratic at higher speeds.


With no further adjustment, I woke up early on Sunday morning and took the 7 for a drive. Ambient temp = 5C.  Drove about60 miles and speedo behaved perfectly.

On returning home, I left the 7 in the driveway for the morning, then about 2pm, ambient temp = 25C in the shade (hotter in full sun) I took the 7 for a short drive. The speedo was stuck at zero.

So, I’m going to get back to the Caterham guys…….

Dragon Lidy – at it again…

Template on left & first cut-out piece on right

Template on left & first cut-out piece on right

As you know, there is very little space to put things and Dot wanted to be able to fit a travel bag. Having seen some designs on the internet Dot set about making a bag to fit the 7. Here are the photos.

View from the back

View from the back

Side view

Side view

Inside view

Inside view

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