All Things V6...

[HaydnR]

No problem. I thought that they all looked the same with single inlet a the top and two (one large one small next to each other at the bottom) although the aep diagram looks as though it is displayed upside down.

[CitroJim]

I'm getting a distinct feeling here that the C5 V6 is going to be almost as much 'fun' as the XM V6 for parts availability and costs

Can't a a bit of good old ingenuity come to the rescues David, at least to get some coolant circulating so the rest of the car can be assessed? Even down to bodging the leaks for now perhaps to see if any more show-stoppers exist once the car is mobile.

[Chris570]

I Agree with Jim, sourcing a rad for mine was a total pain in the backside and in the end i've gone for a 406 v6 manual rad that has the same core just the pipes are in the middle and not top and bottom, nothing that some careful persuading wouldnt sort. I've not looked but would a 407 yield better results? even if its only on there to test as JIm says.

[DHallworth]

I've ordered the radiator and pipes this morning.

I managed to get the radiator and both pipes for half of what they'd cost at retail so am hoping that if anything ever happens to the car they'll at least be worth something as it's all genuine Citroen parts I've gone for as well.

Fingers crossed!

Jim, the old rad was leaking as fast as I could fill it unfortunately. I guess I could of linked the top and bottom hoses but at least I've got time to get the timing belt changed on Monday now as my parts won't be in stock until Tuesday.

David.

[DHallworth]

Following on from a hectic weekend on call and a reminder from my parents and Cheryl about how many things I've got that need doing over the next couple of months my Activa V6 conversion has had to go on the back burner for a little while.

In a nutshell, I think I'm going to do the conversion after I've taken the car off the road after using it for the summer. So, to make the summer a bit more fun I've bought two little toys for the car...

First up:



Second Up:



I'm thinking of trying to locate the boost gauge in the storage bin in front of the gear lever, just as a temporary measure whilst setting everything up. What's the best way to get a small pipe from the bulkhead into the passenger compartment within the car?

Am I right in thinking that the ECU cuts the ignition when the boost pressure exceeds 1 bar of boost?

If so I'm thinking that if I set the boost controller at around 10 or 11psi then it should keep it away from triggering the engine management light?

If anyone can offer any input to fitting and tuning I'd be more then grateful as it's the first time I've ventured into this area of fiddling.


David.

[CitroJim]

It'll be interesting to see what you think after fitting and fiddling with the manual boost controller David; you may even feel the V6 conversion might be unnecessary.

I know when I drove Chris570's it was exceedingly so but he has a tweaked ECU too..

Don't go too mad on boost as the stock ECU will cough if it spikes above 1 bar so 10-12 psi should be OK. If the EML pops on then turn it down a tadette..

I'm just trying to wrench myself away from my XM and use my Activa now as a a daily summer car.... Having a potentially misbehaving tyre on the XM helps...

[Citroenmad]

It'll be interesting to see what you think after fitting and fiddling with the manual boost controller David; you may even feel the V6 conversion might be unnecessary.

Feel free to let me rehome your doner S2 V6 if you come to this conslusion

I think the V6 Xantia is held back by the autobox, which while good does make the car a cruiser rather than a sprinter. I found little difference between performance with my slightly tweeked Activa and my very healthy V6. They do have very different power deliveries. The V6 has more top end go but only really a benefit if on private land .... I prefer the TCT for low down torque, the V6 only really gets going well towards and over 4000rpm.

[CitroJim]

Feel free to let me rehome your doner S2 V6 if you come to this conslusion

Ahhh I knew it Chris! I knew you'd end up missing something with an ES9 V6 under the bonnet!!!

Go for one. They're the perfect complement to the Activa. In fact I'd say they were the perfect pair of Xantias really

[Citroenmad]

I do really miss my V6 Xantia but it had to go to make way for this HDi at the time, that and the Activa were indeed a great pair.

[KP]

That looks like a Pressure Relief Valve. For a smooth boost top your best to fit a Pressure Bleed Valve as it doesn't then overspike as much IMO.

As for mounting the boost gauge i'd aim for somewhere higher up if possible, maybe one of the A pillar pod things but just 3m padded on a little to keep it in place so as easy to remove later on?

[DHallworth]

For a smooth boost top your best to fit a Pressure Bleed Valve as it doesn't then overspike as much IMO.

Hmm, I read the opposite on the net

Does the fitting of one if these need insurance say so?

Quite probably, I'll give them a call tomorrow to keep me on the straight and narrow.

I've fitted the controller to it just now, the difference in performance is huge, the way it pulls in 2nd and 3rd gear on the lanes round here is massively different.

Just need to find out how to plumb the boost gauge in to make sure it's running ok now. I've tweeked it several times and the EML still hasn't come on so wanna see what's going on.

David.

[DHallworth]

Same post as Activa section just to increase the views

I'm having a dumb moment I think... I plumbed in the boost controller and took it for a run around the lanes here and the difference was huge and no matter how tight the screw was the ECU just didn't seem to be triggering the EML. However after looking at a post Dean made a while back and comparing the instructions that came with my controller I was convinced I had it the wrong way around so turned it around.

Here's the instructions:



I currently have the spigot marked "waste gate actuator" on the pipe that disappears down the back of the engine and the one marked "to turbo" connected to the pipe that goes into the connection just in front of the throttle body.

When flooring it the car takes off like a scalded cat, but now at high revs I get the EML light coming on however it doesn't seem to be affecting performance. After dropping off wide open throttle for a couple of seconds the light goes off and you can continue driving as normal.

I'm petrified of getting it wrong and damaging my engine. Although it will be coming out at some point it seems stupid to risk damaging a 50k mile TCT engine so any advice/suggestions/input you guys have would be more then welcome.

Thanks

David.

[Ben82]

David, Maybe use a Lexia to read the error code from the EML being on? Hopefully should give you an idea of why the boost is triggering the EML at high revs at least.

[DHallworth]

Good shout Ben.

Just had a look at it now, the fault is:

Intermittent Fault
Regulation of the turbo pressure

David.

[Ben82]

David,
That to me (bear in mind I have absolutely zero experience of these things ) sounds like the boost is set too high and needs adjusting down slightly as per the instructions?
I could be completely wrong though

Edit: looks like you've had some more informed replies in the other thread!