C5 Vtx+ Hdi16

[cupton]

Hi,

 

new member here, just jumped  from a 200,000 mile 406  to  this 2007  C5 HDI16 manual  114,000 miles

 

So far so good, 200 miles after oil and filter change,  everything still seems to be in order except..

 

  'wet'  rear suspension gaiter

 

 injector #3   surrounded by coke  but no extra mess on the cover as yet, i.e. it has leaked  in the past..

 

 

 If left for  days the rear suspension dropped,  drive is on a slope,  in fact it looks like   its  self levelling.

 

I am having an undertray fitted as (a) its missing and (b)  I drive over farm tracks , and ©  the 406 had one.

 

Any comments or advice ?

 

Clive

 

 

 

[paul.h]

Welcome to the forum.

 

The wet rear gaiter may need a new strut. About £130 for the part plus an hour to fit. I tried on our C5 just replacing the gaiter but this did not work and it still leaked. Also when replaced the rear stopped dropping overnight so this could sort out your other problem. It seems normal thought for a slight drop but the car will still be parallel with the floor, not one end down compared to the other.

 

The leaking injector seal where it contacts the cylinder head needs replacing before you get too much carbon build up. If left the injector can be very difficult to remove with possible injector damage.

 

On the C5 Technical is a pinned topic of Common Problems to look at and on another section some info on cleaning the brakes. The rear ones get a corrosion build up between the caliper and suspension arm that needs removing every couple of years or you get brake squeal and the caliper can be pushed out and touch the wheel.

 

At 10 years old the car is due for the timing belt/tensioner/water pump/pulley replacing if not already done. The exhaust dpf and eolys fluid additive should already have been serviced (dpf clean or replace and fluid top up) but you can check your records.

 

Haynes do a workshop manual that is worth getting. If you need to jack up the car always raise the suspension to max height first before using the jack to avoid possible suspension problems. If going under the car always use axle stands since if a height sensor is caught the suspension can quickly drop to a very low level.