
I spent the day at Richard's today, first we did the timing belt on his C4 Picasso - apart from a bit of difficulty dealing with the aux belt tensioner the job went smoothly with no other hitches. Not only did it fix the worrying noise he was hearing it's given the car new pep below 2000 rpm now that it's not running on a stretched timing belt!

Then we had a look at the rust hole on my drivers side sill. After grinding back most of the rust, here are the gaping holes left:


Not visible in the photo, but the bottom half of the vertical partition inside above the holes is rusty too. I know nothing about welding but according to Richard its a fairly big job to fix properly. (Ironically the rest of the chassis is almost rust free and very good for its age)
If that was the only thing threatening to fail the MOT I would consider fixing it, but it's simply the final straw of a number of problems.

While it was up on the ramp I noticed both the lower arm rear bushes are stuffed - the left one is completely split and looks bad enough that it must be a fail. There is also an LHM leak that looks like its coming from the power steering pressure regulator, where the feed pipe goes from rubber to steel and the low pressure return off the regulator whilst not leaking itself has a split in the hose as well. The main pressure regulator is also leaking at the top a little.
All of these own there own would not be terminal and are solvable problems, but then we have the issue of the engine and gearbox.
I'm satisfied that the engine has a valve train problem that is causing the intermittent loss of power and intermittent misfire, possibly even the stumble on acceleration from idle. The vacuum waveform clearly shows one cylinder has a major problem, and only confirms the symptoms. I don't know exactly what the problem is, but I know it won't be fixable without taking the heads off. (Both heads, as I can't identify the offending cylinder) It might be a broken valve spring, a collapsed or seized hydraulic tappet, a sticking valve, a burnt valve etc.
Doesn't really matter which of the above it is, it's out of my means to fix it even if I was working cosily in my own garage with a spare car instead of on the side of the road with no spare car. The emissions only passed a year ago by a hair (probably fudged) so chances of it failing emissions are very high, and if it does I have no practical recourse to fix it if its a valve train issue.
Driving to Richards and back today the performance was crap, to put it bluntly. Feels like its either misfiring, has badly retarded timing, or both.
Then there is the gearbox. The gearbox truly does feel like it's failing now. Its done about 6000 miles since I first thought it was on the way out, and a number of oil changes have kept it running for quite a while longer, and relatively trouble free for most of that time, but I'm sure its now at the end of its tether and must only have a few thousand miles left in it, maybe less. I don't think it will last another year.
It's misbehaving quite seriously now, and I suspect the filter is getting clogged up with torque converter clutch debris. The torque converter is quite grabby when it engages (the friction material is probably down to the metal!) and there is some shudder accelerating from slow speed in 2nd gear. The revs are also "flaring" up on up-shifts suggesting clutch pack slipping, and on the overrun when slowing down I have now had a number of bangs/jolts even when locked manually in a certain gear, suggesting low oil pressure.
In short, the gearbox is going to pack it in soon, and has got a lot worse in just the last two months. This alone is reason to give up on the car as I can't feasibly overhaul or replace it. So with great regret (but also with a sense of relief) I am hereby giving up on fixing this car and will not even take it for an MOT.
I'm now officially in the market to buy a car, as soon as reasonably possible - I have about 7 weeks MOT left (18th August) so I would need to have bought something before then. As soon as I have another car and it's working satisfactorily (any initial maintenance done) I would be disposing of this car as soon as possible, as I really don't have anywhere to park a second car.
Anybody who wants a parts car that you can get in and drive home without needing a trailer or flat bed truck, it's yours for £100, as soon as I have another car. (Or soon before the 18th of August if I can't find one in time) While the gearbox is getting pretty knackered I'm sure it will manage one last long drive to its final resting place without trouble, just don't rip the **** out of it on the way and you'll be fine...

There are quite a lot of new parts on this car including a coil pack just over a year old, (worth more than £140) new genuine OEM oxygen sensor (just a couple of months old) worth £80, a new fuel pump worth £60, the injectors have just been cleaned and found to be in tip top working order, the cruise control system works, electric seats both work, CD changer works, (although the radio mode isn't very good) air con works, electric windows all work, the battery is good, the hydraulic pump is in good order and has had new seals fitted, the hydractive system works, etc. It has brand new discs and pads on the rear. The front has two Michelin Energies with over half their tread left.
If nobody wants it I'm removing a few parts (all ECU's, coil pack, fuel pump and a few others) and it's going to the scrap man. Unfortunately I'm not in a position to strip more than that, even though I would love a spare set of wheel rims to put winter tyres on for another Xantia etc...
Thanks for all the help guys, but after 120 pages of grief its time for me to move onto another car.

I am actually very tempted to get another Xantia V6, but there are a few prerequisites - MOT for at least 6 months, an overhauled / low mileage gearbox of known provenance, no engine performance problems, no MOT rust problems, and at a drivable distance back to Glasgow. If you have something that fits the bill, get in touch
