In article <3u9gvqF1048k0U1@individual.net>, Huw
>"PacMan" <email@example.com> wrote in message
>> Hi all, and sorry for jumping in with a question to begin with.
>> I have a 1997 Defender 90 tdi, now with 80,000 miles, which wouldn't
>> start this morning. Diagnosis: need a new battery, since I know this
>> one's at least 5 years old.
>> Halfreaud's didn't have the recommended one in stock, and when I take
>> the old one out to connect to my bike's Optimate overnight (tell you
>> if it works tomorrow), it looks like the only constraint on battery
>> model is: will it fit under that front seat compartment?
>> Any recommendations, advice, or should I just go out armed with a tape
>> measure, and buy the biggest ampere hourage(?) battery I can find?
>I would use the commonly available, powerful and relatively cheap type 643.
>These are bought by factors by the pallet load so they are excellent value
>for money and were standard fitment in hard[er] to start indirect injection
>Land Rover's as well as many old tractors fitted with 4litre Perkins and
>I do believe that LR has despecced their batteries since the arrival of the
>TDi and now probably recommend the 089/4 which has about 590CCA and 72Ah
>compared with the [probably] cheaper and superior 643 which has 700cca and
>Rest assured that the 643 fits easily into my LR under the passenger seat
>and was the size originally supplied on all series and 90's and 110's.
Seconded, with two other comments:
It's worth keeping the battery warm-ish - I use laminate floor underlay
(the sort that comes on a roll) under mine, and today am putting
bubble-wrap round it and on top (first serious cold night was last
night). Don't laugh: if the vehicle is likely to get really cold, you
could consider a hot water bottle put next to the battery overnight (not
boiling, obviously), just to keep the temp decent for the morning.
I've a retired electrical engineer friend who's also a Landy enthusiast,
who reckons that heating the glow plugs twice on cold mornings then
counting to five before turning the engine over works well - the high
glowplug current warms the battery up before it has to deliver the
really high cranking current. It certainly seems to help.
Your Optimate won't rejuvenate it, but it's a good idea nonetheless on a
good battery. I keep a small charger (nominally 8-amp, but really nearer
2 as the diodes are packing up) handy, with some long leads wired to it.
They'll fit under the garage door nicely, so that I can keep it charging
overnight (vehicle won't fit in). This does two things: keeps the
battery chemically in fettle by keeping it well topped-up, and the
charging action adds a tiny amount of heat (see above).
One final thing - electrolyte loss will be worse in cold weather as the
air can get much drier (when warmed). It's worth checking the levels at
least once during the winter in case. If one or two cells are noticeably
lower than the rest, the battery's probably on the way out - a
hygrometer will tell you most accurately. If they're all low, you should
charge it gently after you top up with de-ionized water.
SIMON MUIR, BRISTOL UK www.ukip.org
EUROPEANS AGAINST THE EU www.members.aol.com/eurofaq
GT250A'76 R80/RT'86 110CSW TD'88 www.kc3ltd.co.uk/profile/eurofollie/