gjm

It's a balancing act. In the UK, my daily driver was a late 80s Mercedes 300SE. The likely difference between it's sale value, and the purchase price of a newer more economical car (which would depreciate), paid for a huge amount of petrol! I quite like the older X-Trail. Heard some very scarey things about the diesel engine fitted in them, though. Maybe unfortunately I grew up around Land Rovers and their posh cousins, and have some very fond memories.

I've replaced wheel bearings before. This doesn't come anywhere close to that experience. There's no problem. Then there is. Then there isn't. There's no middle ground, no gradual worsening or reduction in severity. It does or it doesn't. My experience with bearings is that they rumble and the effect is noticeable pretty much all the time. F'rinstance, I had the issue this morning - left home and all was fine, slowed coming off the two-lane piece of SH1 on the way south into Huntly and suddenly there was the vibration. Completely cleared a few minutes later (during my investigation) and I've since driven from Huntly to Hamilton, Hamilton to Manukau, and back to Te Kauwhata with no hint of any problem. I'm hoping something comes up on a code read.

Lol Drove a Kia Sorrento hire car - once. Never again. Understeered for the world understeering championships, and that was at around 65km/h on a moderate constant-radius two-lane corner. I really wondered if we were going to make it. Of course, that's a people carrier type vehicle, and not a 4x4 or even a soft-road SUV. Exploring options and seeking experience at the moment. There's the usual contradictory info available on the 'net - buy a diesel because it is torquey and economical. (A Range Rover DSE has some appeal and a BMW engine - can't stretch to the TDV8.) Or buy a LPG-converted V8 something-or-other for the power. Reduction in economy is more than made up by lower fuel price. LPG is fine when done properly. That means with proper engine management updates to account for the significantly different octane ratings of the fuels used. There was a race team in the UK who used LPG very successfully, but then fell foul of new engine mod rules designed to prohibit or restrict some types of petrol-engine tuning. My comment about manufacturer-fitted LPG systems stemmed from a conversation with a service manager at a main Ford dealer. He said his sole consolation was that Ford were no worse (in this respect) than anyone else, and that it was a shame the car manufacturers didn't keep up with developments. I guess it's more difficult as a mass-manufacturer to make those sort of changes.

Feeling the vibration is definitely road speed related; I don't think engine speed plays a part. When the problem is occurring, there's very little noticeable vibration below 50-60km/h. Above that it becomes quite pronounced. (I've underlined 'vibration' to acknowledge something is happening at lower speeds.) It's only by being critical that there is any obvious issue at very slow speed. It's definitely there, but manifests as a repeated 'rub' rather than any sort of vibration. It's almost as though the caliper is being repeatedly activated and momentarily pressing on the disc, over and over again. Not to actually brake and stop the car, just to control speed. Hmm... Cruise control? Don't think so - it happens without cruise control being activated. Mrs M doesn't use (know how to use?) the cruise control, and she has experienced the problem too. Bear in mind that this rubbing sensation is far from normal. Ordinarily - 99%+ of the time - there is absolutely no issue of any sort: no vibration at any speed, no slow speed rubbing sensation. It is only after the higher speed vibration has manifested that the slow speed issue can be detected. Using the brakes may, or may not, help alleviate the issue. It's quite difficult to describe. One of those "if you were there you'd know what I mean" things! I think a code read is in order. It's easier and faster than trying to take things apart in the hope of finding what is going on.

Ta. Definitely would be looking at an already converted vehicle, and one running a multipoint set up. There's a few Ford Explorers around that have been converted, but the older ones are almost exclusively singlepoint (mixer) type conversions, and can be problematic. Early days. Not in a rush, and tbh can't justify (practically or financially) doing anything immediately. Manufacturer (such as Ford, etc) fitted kits carry a bit of a question mark. Typically they aren't as good as the aftermarket professionally-fitted setups, but the price difference may negate that.

This just gets stranger. I've had the car in the air. Nothing seems loose or worn. And the problem is still very intermittent. There's no pattern to when or where it occurs. Rough roads, gravel, highway... It happened again this morning. First time in about 3 weeks. However... I obviously stopped and was lucky enough to get on to a reasonably smooth, straight and traffic-free piece of road. Usual quick check revealed nothing (engine left running) so I got back in and very, very gently eased away. It was immediately evident that something is wrong - it felt like a badly warped brake disc, but not necessarily with the regularity I would expect from a warp - it seemed there was more than one rotation between the rubbing sensation. There was a definite resistance to moving, and it was easy to feel a regular 'grab'. Not enough to stop the car, but sufficient to notice it. So... A brake-related problem, perhaps. The brakes work well, and all discs and pads were replaced not very long ago with good (but not genuine BMW) parts sourced from a very nice and reputable, well-known to the BMW community, supplier. I stopped again, checked the discs - no evidence of a high spot, but this was at the roadside and as such not a thorough inspection. A few minutes later and there's no issue of any sort, again. I've not come across this before, but could something duff in the ABS cause this?

I'm sure LPG must have been discussed on here at some point, but a search didn't turn up any results. We've seen discussions around the merits (or otherwise) of diesel and petrol, and how it's not quite as straightforward as diesel is cheaper, many diesel cars are more economical, but there are RUCs to be paid and rego costs more. Curiously, looking at RUC costs, NZTA refer to vehicles as having petrol or non-petrol engines. Non-petrol engines attract a higher charge for rego. It turns out we may be moving house, to somewhere quite rural. Certainly we're spending more time visiting folk who live in places where sealed road surfaces are less common, and there's been far too many occasions when the underbody guard has rubbed something. I thought about a small SUV before, but as many pointed out - they tend to be less economical than a 'normal' car, less nice to drive, and potentially less safe in an accident. They'll also often not tow much more than a car, and that could become relevant. So, a 'proper' SUV. Something Land Rover Discovery, Range Rover or similar size. The diesel versions (of an age and at a price we'd consider at present) tend to be a little lack-lustre. Talking to some folk in Europe they suggested looking at LPG conversions. And so the fun starts. If a vehicle can run on petrol or LPG, does it fall into the petrol-engined rego class? Has anyone done a similar check to find the relative economies of running on LPG and petrol?

Burnt-orange-coloured (with black wheels) M4 in Hamilton today, driven by an older gent. Nice colour for it, I thought.

I'd opt for the full change - fluid, drop the pan and replace the filter - every 100,000km. Flushing may not always be a good idea - this pushes all the old stuff, and any foreign matter through the trans. Or so I've been told. Marshalls in Hamilton did our E46 at something over 200,000 miles... The fluid that came out was thin and water-like, but fortunately no bits of any sort. Marshalls recommend every 25000km, which I think is as much about them making a job for themselves as anything else. (And it'd mean them changing ours 3 times a year at $250 a time...)

I suspect the mileage covered may be having some effect on economy. There is a good chance the turbo is a bit tired, and it's something I'm looking to replace. Deleting the front cat seemed to make a difference when driving - whether it improved economy is hard to say. Economy was better when I was driving from Clevedon south and back (we're now in Te Kauwhata), but Mrs M has been putting the lion's share of the miles on the car recently, ferrying Miss M to and from school. That's meant more less-than-ideal driving. My Mercedes does 10 or 11km to a litre - more if I drive really carefully - but they were never a particularly economical car and some of the things I've done may not help much. Lovely to drive, though.

Sounds like the job I'm contemplating, albeit on an E46. How did you get on?

I like to think that careful maintenance and not abusing the car has paid dividends - costs have been pretty reasonable - but we may just be lucky. We've gone through some tyres along the way, and mpg has dropped although that may be testament to the change in use - instead of one long run from Clevedon into Hamilton and back each day, it's now doing two trips up and down the Bombay Hills, and significantly more stop-start work. I think we're into some CABs very soon, and I'm keeping an eye on the shocks. However, we're not overloading or towing so it's getting a fairly easy life, if one involving a significant number of kms. Anyone got experience of polyurethane bushes on an E46? The CABs are a known regular requirement so extending their life sounds like a good idea. I think in the past that the entire arm has been replaced, rather than just the bushes and having done this work on other cars, I entirely understand why.

Ours is a UK import car. Mileage varies, from 600+ miles to a tank, down to 500++. That's based on 60 or so litres - I figured 10 miles per litre can't be bad. (Around 16km per litre, 6-ish litres per 100km, a little better on a long run.) I have the biggest pile of history with the car you can imagine. This includes some work done in the UK, the import papers, and lots more. There's documentation describing an issue with swirl flaps and removal, but no mention of blocking or plugging. I've not pulled the manifold to check - it's on the cards. If you're keen, a hybrid turbo, decat exhaust and a remap/ecu swap will see upwards of 190bhp. See also my thread - Life with a high mileage car.

The 320d had seen a slight drop off in economy, and also a marked increase in time taken to get to operating temperature. These engines, like the M47TUD20 in the 320d, have two thermostats - one is the more-or-less conventional item in the cooling system, and the second is associated with the EGR (exhaust gas recirculation) system. The EGR thermostat appears to be the one to most commonly give up, is generally the simplest to replace, and is also the cheapest. As good a place to start as any, then. A little internet searching turned up the video below. 3 minutes, huh? Can't be too bad! So it didn't take 3 minutes. The video doesn't show R&R of the plastic engine covers for a start, but they have to be taken off for just about anything. Some differences (from the video procedure) experienced: The screw holding the vacuum pipe in place on my car has a torx head The hose on the right hand side of the EGR thermostat is held by a fancy clip, not a jubilee-type one. There's an engine lifting bracket behind the EGR thermostat The hose connecting the vacuum pipe leads into a solid pipe, which will not lift out of the way as shown I followed the same process with the necessary changes for my car. When it came to removing the two 10mm bolts to release the thermostat, I had to use a 1/4" drive 10mm socket, a UJ coupling and a short extension. This is awkward but not impossible to get into position - the biggest challenge is not rounding the head of the bolt when removing or refitting. Something I don't think the video shows is replacement of the yellow o-ring that fits on to the thermostat. I smeared the tiniest amount of Hylomar around the shoulder this sits on to before refitting. OK, so it's not a 3-minute job. End-to-end, including finding the right tools, it took perhaps 30 minutes. As with so many tasks of this nature, it'd probably be quicker if doing it again. Result? Well, the engine comes up to temperature much faster (again). Can't yet comment on the economy, and maybe it was psychological, but I felt the car was generally running better post-swap than before. Nothing tangible, nothing serious, just seemed a little smoother. I may have imagined it. I bought the parts from Coombes Johnson in Hamilton and cost was about $100. You can find them cheaper online, but I was in a bit of a hurry to get it sorted. Ordered Thursday, collected Friday, fitted Sunday. Edited to correct the engine designation.

Today I replaced the EGR thermostat. There's a vid on Youtube showing how it's done and describes a 3-minute procedure. It took me about half an hour... I'll do a maintenance thingy about why a bit later.

A friend back in the UK has (had?) a LS7 in an MX-5. He reckoned that if he was going to use an LSx, he may as well do the job properly. I often wondered why there aren't more multi-rotor MX-5s about. Seems (to me, in my ignorance about the RX-7 and so on) a natural conversion.

Traction Control... So long as it's working 90% of the time it'd be OK.

Aside from some of the monster engines fitted into cars that really weren't practical - The Beast and it's 27 litre Merlin lump, Charlie Broomfield's Rover SD1 with a similar engine from a tank (Meteor), those other aircraft engine swaps - what would be an ultimate swap? I present exhibit 1: a Honda S2000. Not your first choice perhaps for an engine swap. Nice little car, speedy revvy little 2 litre engine, nicely balanced, handles well... What would you swap in there? A Skyline motor, perhaps? A 4-litre Lexus lump? Nah. How about an 8.3 litre V10? It's for sale on Craigslist in the US for $27k. Lots for an S2000 maybe, but you're unlikely to find another like this. Kinda brings to mind that twin-turbo E30 V12, doesn't it?

Dunno about that specifically, but make it a bookable offence to drive in the outside lane at 90 when there's nothing in the left lane. Enforce those 'Keep left unless passing' instructions.

It's on a few roads. Waikato Expressway is one that has been mentioned.

Very, very common. The people working in these places get paid peanuts, and eventually the temptation of a bit of fun obviously gets too much. A fried had his mint condition Porsche 928SE written off by Heathrow Valet Parking. He had an almighty battle getting them to pay up, too. Only tip I can come up with - take a car you don't like to drive to the airport. Or hire a car instead.

I opted for a Dexron VI in the E46, and in our Merc, using this. Overkill for the Merc, and Dexron III May be suitable for your E36.

I was coming to the conclusion that for family comfortable motoring, there is little to choose (other than rear legroom). It just seems odd that the 5-series seems so much more popular. The E38 728i isn't a bad car, and on a run is actually quite economical. Good ones are more pricey - a E32 735i goes for $5-6k, an E38 728i is about 50% more - but that could simply be due to them being newer. Or just that I've not seen enough examples to get accurate figures. There's a 728iM (quoted as an M, but I thought those models had different seats) for sale in Hamilton for $9k, but it's been on TradeMe for 3.5 months. Working on the V8 was the only real concern I had about them.

Same engine, different size car. Assuming predominantly highway driving, and not looking for overly sporty handling, is there all that much to choose between the two? The 5-series seems to be the much more popular car... I've debated (with myself) the I6 vs V8 argument, but keep coming down on the side of the 6-cylinder engine. I really quite like the E38 too (just call me Transporter) but they seem to be a fairly rare beast over here. Just thinking out loud at the moment.

All I can say with confidence is that it'll be better than going from Manukau to Auckland. If you're going to be there before 07.30, it'll probably be OK.