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LairdScooby

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Everything posted by LairdScooby

  1. If the 100Ah/900CCA will physically fit, get that one. Alternatively, have a look here : https://advancedbatterysupplies.co.uk/shop/?swoof=1&product_brand=diesel-all-models-2008-present A good selection from £95 upwards to £240..........
  2. Maybe once a fortnight or once a month, take it for a longer run to give it a bit of a concentrated charge to help get round this problem. I use a 1988 Volvo 760 as my "Dogmobile" so its use is predominantly very short runs, however every once in a while i'll take it for a longer run to recharge the battery and blow the cobwebs out.
  3. A fully charged battery is 12.7V : Your alternator should put out in the region of 15.1-14.7V depending whether cold or hot, the voltage may go up slightly on the upper level due to certain things like load etc, especially at idle but the battery is almost certainly a calcium/silver-calcium type which refers to the doping on the plates to prevent sulphation."Normal" lead-acid batteries have lead-antimony doping and need 14.4-13.8V to charge, the calcium increases the charging voltage by 0.1V/cell and with 6 cells, each of 2.2V (total 13.2V) you can see where the extra 0.6V of charging voltage is needed. With so much electronics on cars thse days and so many things referenced to a stabilised supply of 5V, 10V, 12V etc and a variable battery voltage, it's easy to see if the battery drops below a certain level of charge, strange things will happen. To put this into perspective, many sensors work on the potential divider principle where two resistors in series divide the battery voltage. One of those resistors will be the sensor but these derived voltages will be compared to a known voltage from one of the stabilised supplies. To make the figures easy, let's say one of the stabilised reference voltages is 6V. Let's make a sensor where the resistance is 6k and is fed by a 6k current limiting resistor which provides a total of 12k Ohms. Call the sensor R1 and the limiting resistor R2, the voltage developed across R1 = VR1 = Vb x (R1/(R1 + R2) so in this example, VR1 = 6/12 x Vb (Vb is battery voltage) so at 12V, VR1 will be 6V. If the threshold for a fault is 5.9V compared to the stabilised 6V supply, no fault will be shown but if the battery voltage drops to 11.5V, VR1 will also drop to 5.75V and hence register a fault. Bit long-winded for a simple explanation but hopefully gives an insight into how these things work!
  4. It would seem the OE part is discontinued now so you stand very little chance of getting it, even if you've found it listed. However here's a couple of alternatives : https://www.rockauto.com/en/catalog/jaguar,2000,s-type,3.0l+v6,1363294,engine,timing+chain+&+component+kit,5756 I've been using Rock Auto for about a decade, mainly for Volvo parts as my model Volvo isn't well supported in the UK and the predecessor to my S Type was also better supported in the USA than here and never had a bad part from them yet. Even with Shipping and Handling (S&H) it's unlikely to come to 400 Euros but be careful with your local customs and excise - there is usually a shipping option that is more expensive than the others and this prepays any import duty that will be charged and delivers the item to your door without going through customs and the delay and charges that will attract. It also gets round the fluctuating exchange rate - i bought something about 6 years ago, below the threshold (on the day i bought it due to a stronger pound/£) but on the day it went through customs, the £ was weaker and it crept just over the threshold - got charged import duty and a fee for the Royal Mail to send a card telling me this and a further fee for them to collect the import duty! If memory serves it was the fuel pump for my Volvo so the car was off the road for another week while Royal Mail sent me the card, i pai and then they finally delivered. Still much cheaper than buying it in the UK to start with though!
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