Austin 7

Hi I don't think the clutches or anything else in the DSG gearbox is genuinely overheating, there simply isn't enough time for heat to build up before you get the message. It's possible Skoda have arranged for the overheat message to be shown when there is any gearbox related fault code stored, which is why I suggest clearing the present code before doing anything else.

Hi Tien I'm assuming this is a DSG gearbox The error code may be a historic one due to the transmission controller having too low a voltage. Now that you have a new battery It would be best to clear this code before proceeding. The dashboard message shouldn't be taken too literally, I suspect the same message will be displayed for any gearbox related error. The most likely over-temperature condition is in the clutches rather than the transmission fluid, and this clearly isn't the case here with everything stone cold.

Hi I agree with Warrior193, it's too much of a coincidence having the cooling system drained and refilled and then the heater not working. Air lock would be my first thought. Cooling systems have got more complicated over the years, with control valves, multiple thermostats etc.

Hi The symbol you show is variously described as the Malfunction Indicator, Check Engine Light and Emissions Light. I believe this is partly a European legislative requirement to indicate that a fault may be making the emissions higher than they should be. Depending on the fault severity, you may also have restricted power mode to avoid engine damage, but it doesn't sound as though you have. So your fault may or may not be directly associated with the exhaust and catalyst etc. It's a bit odd to get multiple fault codes which have no apparent connection to each other, but fault codes are only a guide/starting point to full diagnosis. With the right equipment it should also be possible to read the state of other parameters at the exact time the fault code was stored - this can sometimes aid diagnosis.

Hi I attach the self study program SSP070 for Skoda. Also, you can find some Haldex schematics here: https://www.vdveer-engineering.nl/en/information/haldex-4motion/haldex-schematics I attach a PDF of the one for the Golf 7, it's in German. Note that TSAA is the connector for the 4WD unit, and 197 is the Ground Connection in the Rear Wiring Harness. So the unit should be grounded via this wire (br = Brown, 0.75 square mm cross-section). It should not be necessary to add any extra ground wires. Another thicker brown wire goes from here to Point 6, the Ground point on the rear left frame. I suggest you check out both these wires carefully for corrosion etc. Power comes from one Fuse via a Red and White wire of 0.75 square mm, Fuse number depends on the year for this example. There are three thinner control/data wires which go the unit marked J533, the diagnostic interface to the data bus. Your vehicle may differ in detail, but I would be suprised if it is very much different. SSP 070 All-wheel drive with Haldex coupling Generation IV.pdf

Hi Johann You seem to have tested most things. I recommend that you double check that the Haldex unit is getting full battery volts, as it would only take about one ohm of excess resistance somehere in the feed or ground cables/connections to cause significant voltage drop and then operation problems. Even fuseholders can develop tarnish, try pulling the fuse out and putting it back a few times to clean this. I suggest you wire up an independent voltmeter inside the vehicle (with extension wires/probes) connected to the 12 volt feed and ground return at or near the connector to the Haldex. Maybe when the control valve solenoid warms up its electrical resistance increases just enough to stop it working ? Copper resistance increases roughly 10% for a 30 degree C rise. This website has some useful information: https://www.haldexrepairs.co.uk/guide-generation-4-haldex-trouble-shooting/

Hi If you climb a bank therefore increase the engine load you will be increasing the turbo boost pressure. Normally you would also press a little harder on the accelerator to maintain speed, but this is something you may do unconsciously. It's possible you have a small air leak somewhere in the air intake system upstream of the turbo, which will be more noticeable at higher boost. The rattling may be associated with the wastegate and its actuator and linkage on the turbo. Unfortunately, you can't really test this with the car stationary as there isn't enough load on the engine to get any appreciable boost pressure.

Hi You could probably drive a mile in cold weather from a cold start with no coolant at all, though I wouldn't recommend it ! I suspect you still have most of your coolant in the system, try squeezing the large radiator hoses - the "feel" will tell you if there is air or coolant inside. If still mostly full I suggest as above that you top up with the correct stuff and then use the car but keep a frequent eye on the expansion tank level and the temperature gauge. Coolant often contains a dye to help with leak tracing, can you see any pink residue around hose joints etc ? I think gasket failure is unlikely, and you would detect a misfire/lack of performance. When the original alarm went off, what was the temperature gauge showing (if you can remember) ? It's possible that the thermostat is not opening fully and restricting the maximum flow to the radiator. Maximum flow is only needed when the thermal load is high e.g. motorway driving. One failure mechanism of a wax capsule thermostat is that it loses some of its wax and then doesn't open fully. This probably won't trigger any fault codes. Clearly something triggered the original overheat alarm and it would be good to get to the bottom of that even if things seem OK now. If you ever find yourself in an overheat situation where you can't pull over promptly, it's a good idea to put the heater on maximum and use full fan assistance to take the water temperature down until you can stop safely.

Hi I can't really think of anything that would link a clutch replacement to a change in real mpg. The Yeti seems to normally have particularly low rolling resistance, so for lower speed journeys this helps the mpg. I have a number of regular medium length journeys and find the two main things that affect mpg are the amount of traffic (no surprise) and whether it is raining. I put the latter down to the extra drag of tyres on wet versus dry roads, and the extra drag of driving through puddles etc. I used to run on ethanol free Esso fuel, but that's now 5% ethanol so I am back to E10 which has made consumption about 2 mpg worse. I'd be inclined to see how things go, but you could have a peek under the bonnet and under the car to make sure all the cables and hoses have been put back !

Hi Occasionally, the clutch friction disc can stick to the flywheel due to a very thin rust layer if it gets damp and hasn't been used for a few days. A bit like brake pads sticking to the discs. Sometimes starting in gear (carefully) and driving for a bit so the friction disc is called upon to transmit some torque will free it off.

Hi Raising or lowering the dipped beam by a fraction of a degree makes a big difference to the distance at which the dipped beam top cutoff intersects with the road. The same change to the main beam is much less noticeable. I suggest you go back to the VAG indy and get them to reset the dipped beams nearer to the upper tolerance limit of the beam setter. I have my beams set at about -0.7% which with headlamps 780 mm above the ground places the cutoff on a level road about 100 m away. With this setting it always passes its MOT but I very occasionally get flashed by someone. The headlamps do also have manual allen key adjustments, in case the NS and OS beam heights are not quite the same.

Let's be clear about this. The car is 11 years old with 70,000 miles. I use it 3 or 4 times a week and it always starts immediately, hot or cold, rain or shine. Then I do two cold starts in quick succession and drive a total of 50 yards, stopping the engine well before it has warmed up. Next day it will turn over but not a sign of starting. Hold the throttle fully down for another attempt and it starts. Since then it starts immediately every time. I am convinced this is a flooding issue, i.e. Air /Fuel ratio below the threshold for ignitability (about 8:1) and I suspect any AA or RAC man would tell you they have encountered it many times. So my post was just to help anyone else to avoid the same mistake, or to know how to simply solve it without calling for breakdown assistance. I don't need a new battery !

To answer some of those points, the battery is only a few years old and is regularly charged by the car being used 3 or 4 times a week. No stop-start (thank goodness). Using fairly fresh E10, but last time this happened (years ago) was in E5 days. Air filter is reasonably young, but airflow at cranking speed is pretty minimal anyway. I didn't "hear" about spark plug insulators absorbing fuel, that's just my own thoughts trying to reason out what's going on. Lambda sensor is effectively out of circuit during warmup, and in my view during the crank/start phase the injectors will be pumping fuel but if it doesn't ignite for any reason there's only one place it can go - out of the exhaust valve and into the catalyst/exhaust. There was never any misfire in the normal sense, more a total non-fire. Once I tried the full throttle technique the cranking seemed more vigorous and startup happened reasonably readily. The plugs are due a change, and the new ones are sitting on the shelf nagging me so it will get done once it's not so flippin cold out there ! Anyone else have a view as to what's going on ?

My Wife thinks I am a fusspot for insisting on only starting the car if I am going to drive somewhere. However, a few days ago I came home late with a heavy load, so it had to be dealt with the next day. This involved a cold start ( 5 degreees C) backing out of the garage for 25 yards to a convenient spot, unloading and then restarting and going another 25 yards back into the garage. I followed up with a token 30 seconds or so of idling before switching off. Next day (5 degrees C again), it refused to start.... Despite a good battery it felt like the starter was struggling to turn it over. I then remembered the same thing happening years ago in similar circumstances. The solution is to hold the throttle pedal fully down whilst operating the starter. This time after some churning it fired up and cleared, with a brief puff of grey smoke from the exhaust and a smell of raw fuel. Since then, it's all completely back to normal and starts immediately every time as usual I can only assume that this is due to the spark plug insulators absorbing fuel vapour overnight, or maybe the catalyst getting loaded with unburnt fuel or condensation from the previous cold starts and thereby choking the exhaust. Maybe the ECU has a "clear flood" mode if you hold down the throttle to pump plenty of air through, just like in the days of carburettors ? Anyway, lesson (re) learnt and no more very short journeys !

Just to clarify, these are standard 17 inch factory wheels with 225/50 tyres, no "rubber bands" ! No visible problems or unusual wear noted with the tyres, but they were down to about 2.5 mm tread depth, and were replaced a few weeks ago. The garage that did this (a VAG specialist) balanced the wheels without needing an excessive amount of weight and then carried out the MOT. That was when the buckles were noted as an advisory. On querying this, I was told not to worry, that it was commonplace and something they saw all the time. I was still uneasy, hence my own check and the decision to get them straightened. The second garage (tyre specialist) told me that the damage was mild compared to some that they have dealt with. The new tyres are Michelin Primacy, and are noticeably quieter than the Dunlops they replaced.