Few niggles, advice appreciated

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Saltyhair81
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Few niggles, advice appreciated

Evening guys,

Couple of questions regarding a few minor issues on the car.  Probably been covered a few times but just in case...

1. Reverse light - When you put the car into gear, the light comes on but then goes out again. It seems sporadic into how long it stays on for. Any ideas?

2. Condensation badly in the speedo and a bit in the Rev counter - I have Caterham warranty as I only bought the car a week ago, would we all agree these are items that need to be changed under warranty? The speedo is getting to the point its covered 80% by condensation and causing a hazard.

3. Occasional clunk - I'm hoping this is just the LSD and I am sure it is, but would this again make a random noise.  Tends to be after I have changed gear and throttled up, but I have also heard it at other points.  Reason I ask, the prop bushes in my transit are shagged and worryingly it makes a similar noise.  My transit has 130k and this has 11k though!

I believe that is it so far, I may add to this thread in time - but I hope I don't! 

Thanks in advance. 

SM25T
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Condensation in gauges ... they all do that. Leave a rubber bung off from the rear to equalise temperature inside instrument to the outside air.
K7 VCT
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If a ford gearbox, reverse light switches are common failure. Condensation in gauges in cold weather is normal when heater on. Noises are all part of the 7 experience, gearbox, diff all of it.

Orange is my new black

Ballistic orange 310s
Saltyhair81
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It's the 6 speed box so I believe Caterhams own. Sorry I should have mentioned that. 

Jonathan Kay
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Edited: Crossed with #3 above.

Reverse light - When you put the car into gear, the light comes on but then goes out again. It seems sporadic into how long it stays on for. Any ideas?

Hmmm... lots of possible faults.

Have you got a multimeter and the appropriate wiring diagram?

All other circuits OK? And it does it predictably?

Start with the easy bits:

  • Have a look at the lamp unit because it's accessible: open it up, look at the connections, wiggle, take the bulb in and out. Try a temporary good earth. 
  • Then the reverse light switch and connections at the gearbox. IIRC there are two different types of connectors used.

Jonathan

PS: Do any Sevens have a relay for the reversing light?

Jonathan Kay
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Condensation badly in the speedo and a bit in the Rev counter...

As above.

There's a fix that improves ventilation: carefully sawing a slot in the case of the instrument. Previous discussions.

Jonathan

Saltyhair81
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Thank you for the details, good advice.  I'm just not sure how much I should do myself under warranty.  Another thing I have remembered, the left side of the switches (brake fluid, hazards etc) have no lights when the lights go on. Again, is this normal or maybe a fuse/ internal lights have failed?

Jonathan Kay
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I can never remember how that is set up, but here's what happens on *John Vine's and mine.

Jonathan

* Although that was recently discussed...

John Vine
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What year and model is your car?

...the left side of the switches (brake fluid, hazards etc) have no lights when the lights go on. Again, is this normal...

Yes.  Brake fluid and hazard switches light up only when you operate them.

I'm just not sure how much I should do myself under warranty.

Assuming you're fairly close to CC,  it would be a good idea to get them to check out your problems (especially the clunking noise), just so there's a record for the future should things get worse.  

But it's worth doing a couple of simple checks of the reversing light yourself anyway.  As JK says, have a look at the lamp unit and the switch connectors.  For the latter, remove the large rubber grommet on the driver's side of the transmission tunnel.  This will reveal the switch, and you should be able to check that the connectors are clean and secure.

Agree about the misting instruments.

JV

 

Saltyhair81
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Great stuff. I'll have a check of everything next weekend when I give the car a clean.

I am 15 minutes from CC so distance is no issue for me!

Geoff Brown
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Turn the reverse light switch in by a fraction at a time till the light stays on. It was the other way around with mine - a quarter turn out stopped the reverse light illuminating every gear change.

A clunking LSD seems pretty standard but make sure that the LSD has oil with good anti knock qualities. Preferably a 70W 140  (Castrol Syntrax LSD 70w 140) or any other good oil around that index level.