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Snapped my clutch cable again
JoelP - 29/10/24 at 12:20 PM

Pinto to type 9. It runs far too close to the exhaust. Short of a new exhaust, I have to just heat shield it and be prepared to change it occasionally. Fortunately, the new one I already had in is a good few inches longer, so can take a better route. Unfortunately, my exhaust wrap seems to have fallen to pieces. The exhaust passes 2cm from where the cable terminates on the bellhousing.

I need suggestions for either the best exhaust wrap, or a type of heat shield that I could squeeze into the literally 2cm gap. Any ideas? Cheers!

nick205 - 29/10/24 at 12:53 PM

A PITA, would changing to a hydraulic clutch improve things?

Appreciate there's some cost and work involved, but if it overcomes the issue and gives a better clutch feel.

obfripper - 29/10/24 at 03:25 PM

It's prably worth finding a heat shielding sleeve like used over lambda sensor wiring and covering the portion of the cable that passes the manifold.

For example:
https://cpc.farnell.com/sleeve-it/firesleeve-22mm-1m/fireproof-sleeving-22mm-1m-red/dp/CB23792
There are versions that have metallic coatings that reflect the heat as well, I can't think of any oem ones that might be suited to fitting over a clutch cable offhand though.

This should protect the cable pretty well, for any further shielding an aluminium sheet between the manifold and cable may help if there are suitable hard mounting points.
Any heat shielding from the underside of a scrap car could be reused for this, the bits round the fuel tank and tunnel are ideal.

Dave

jacko - 29/10/24 at 03:31 PM

Can you run the cable through. A steel tube and maybe wrap that as well as the exhaust You can get heat protection for cables that may go over piping
G

JoelP - 29/10/24 at 06:19 PM

Cheers guys. I've ordered some standard wrap and a 25mm sleeve. I'll try it with the cable in both the sleeve and a piece of 22mm copper pipe on the outside. Copper should conduct the heat away nicely.

Sarah - 29/10/24 at 06:22 PM

https://www.carbuilder.com/search?q=heat+sheild&options%5Bprefix%5D=last&type=product

scudderfish - 30/10/24 at 07:22 AM

quote:
Originally posted by JoelP
Cheers guys. I've ordered some standard wrap and a 25mm sleeve. I'll try it with the cable in both the sleeve and a piece of 22mm copper pipe on the outside. Copper should conduct the heat away nicely.


The distance to conduct heat is much shorter through the wall of the pipe than its length though.

MikeR - 30/10/24 at 08:53 AM

Caterham have the same issue with some of the new models - i'd look what they've started to use after a spate of them breaking.

(it might not be Caterham themselves, but the aftermarket support companies adding this).

cliftyhanger - 30/10/24 at 12:16 PM

I would suggest heat shielding is going to give te "best" returns for effort. A simple bit of sheet ali on a bracket (or 2) attached to the bellhousing may help significantly IF you can squeeze it in.