The Titan limited slip unit has some known issues including early wear rates or complete and catastrophic failure.
(From an article I wrote for the May 2020 edition of Low Flying.)
Since 2010 the Seven has been fitted with a BMW differential containing a Titan limited slip unit either as standard or as an option. In service reliability since that date has been of considerable concern to owners.
It is well known that the rear ARB drop link ball joints wear over time especially the lower joint. This maintenance procedure should hopefully extend the ball joint life significantly.
This guide is based on myTechTalk thread "Duratec R400: removing/repairing/replacing wet sump" (April 2016).
Although this guide is aimed at pre-2015 Duratecs, it may also apply to most Sigma models, and probably the 160 too.
Note: I've based this guide on an article I wrote for Low Flying (August 2004). It applies to cars with cable-operated clutches, and specifically K-series from around 1997 on.
Cam Timing (Non Standard Cams with Vernier Pulleys)
When turning the crankshaft to TDC, always turn it in such a way that the movement of the pistons is minimised.
As the bolt heads are recessed at both sides where it attaches to the de dion tube and a fairly tight fit for a socket, I didn't seem to be able to find any of my metric sockets that would fit.
Adding VVC to an EU3 K Series Engine Wiring Loom
By Andrew Revill. With thanks to Alan Archer.
Thanks to ben7 for creating this document and to Paul Deslandes and Jonathan Kay for their valuable input.
I'm about to remove the engine/gearbox from my car for some work on the engine/clutch - I've a few questions below but any other useful tips greatly received:
Close the TBs completely and then adjust the balance mechanism so that both start to open at *exactly* the same time. open the throttle fully to make sure that all 4 plates are at the same angle when fully open to confirm they are in balance, it's often easier to see discrepancies when the throttle is fully open.
Rear Light Corrosion
Caterham rear lights always corrode on the inside as they cannot effectively be sealed. This is because they are trailer/caravan rear lights, but mounted upside down. As the drain holes are now at the top water gets in, especially if the car is used all year round.
This is the assembly guide from 2014 and covers Sigma engined cars.