If its billowing out of the exhaust and you're not losing coolant, the two don't sound related. Unless it's oil... Has the level on the dipstick moved? Pull the spark plugs out, is one noticeably cleaner or more oily than the rest?

....you gotta be kidding.

Hmm, interesting! We need a larger sample size, wonder who else has a TD4 auto we can knobble.

Ahh, didn't realise there was a way through to the right, can't see it in the pitchers.

Quite a lot of fluid came out overnight with just one hole, probably about 50ml or so. I've drilled a breather hole now, filled it up with brake cleaner for a while and then left it to drain again: Thanks for the tip about spinning it while it's on its side, will try that when I've left it to...

Differentials confuse the hell out of people because they have weird teeth numbers in them and apparently operate on witchcraft. But standard planetary gear driven differentials are dead simple, they have an equation: Input RPM x 2 = LEFT RPM + RIGHT RPM This means if LEFT RPM = 0 (wheel on...

The second picture on that thread shows the power path to the front wheels V6 = 30 -> 23 teeth, 22 -> 39 teeth = 0.77 * 1.77 = 1.36 1.8 = 29 -> 24 teeth, 21 -> 37 teeth = 0.83 * 1.76 = 1.46 This means that the V6 is longer geared than the 1.8, it spins slower for the same speed as it has more...

Yep, but the gearing to the shaft that the crownwheel and pinion are on from the diff changes... Apologies if this sounds condescending, I just want to make sure we're on the same page and I've explained it clearly. So if you look at both the IRD pictures in his thread, start from the front...

Because of the way the gear train works in a U shape and the fact that the output crown wheel comes off the intermediate step when you change one of the two ratios in the box you have to change both if you want to keep the input and output shafts centralised. Have a read of...

Hold up a sec, I'm not sure if I've got this right but do you mean that the propshaft -> front diff ratios are the same regardless of IRD? (I may have misread that) Cuz; V6 : Propshaft to Front driveshafts (or diff) - 3.206 Non V6 : Propshaft to Front driveshafts - 3.186 They're slightly...

I wonder if those ears are unique to the TD4 or final facelift? Mine was the more simple version, but I've ripped all of the plastic off it anyway just leaving the metal frame. The plastic was infuriating me while I was trying to diagnose what turned out to be head gasket failure. Go and...

The little ears are actually part of the undertray and should not have been separated: I doubt you'll find them separately!

Yup, your rear diff mounts will be shot: Very common fault, you can either spend £10 on a replacement and it'll last a year if you're lucky or get a good quality one for 3-4 times that!

Might need to look at the bushes on the rear of the front suspension arms. They may have gone soft allowing the tracking to drift under acceleration.

Ah fink I may have been lucky, my vcu has been sat on the garage floor for three months, so I deliberately drilled it on the side that had been sat pointing downwards - gas pressure started expelling the fluid. I'll see in the morning where its gotten to and get another hole drilled 180 out to...

My intent is to do the following: 1) Drill two holes 180 degrees apart 2) tap them at 10mm, produce short bolts with copper washers 3) Pressurise one hole and blow as much of the fluid out as possible with compressed air 4) Fill it with brake cleaner, seal it and drive it for an hour or two with...

MEANWHILE... Going to give it a go!

Looking at the rimmer bros website, they appear to state clearly that there are two IRDs 4 & 6 cylinder. But, apparently @dfossil has been doing some manual tests and his TD4 auto pops a difference of about 0.2% - but I'm not sure sample sizes and other empirical data! We may need to get...

Bingo Your voltmeters will read whatever the highest capable source is - so if your batteries are at 11.5, 12.1 and your alternator is at 14.4 - if all three are tied together both meters will read 14.4v This is because the batteries are no longer sources in this case - they are considered...

Near as damnit, 1:122.34 manual box 1:495.60 Automatic However, as I'm sad, I've made another sheet up *drumroll* I give you the tyre size vs speed to slip rpm calculator! Fuelled by Monday morning coffee and a touch of boredom. Again, happy to give this away! I've realised that I may...