Battery advice for 1974 P6 3500s
- Thread starter Lee B
- Start date
jp928
Well-Known Member
Since battery codes differ from country to country non-UK recommendations are pretty useless. Book says
"Lucas RCAZ 11 /7 or Exide 6-XAZ 11 R or Exide 6-XAZ 13 R", 60Ah. Measure the old one, noting any codes on it. "positive on the left" means , looking at the long side with the terminals on the side closest to you, +ve on left. Grease the terminals lightly after wire brushing before connecting. Clean the connectors, especially the earth lead at both ends.
Bears repeating - for little used cars an annual inspection and cleaning of electrical connections will help to keep you proceeding. I use a local product Deoxit on spade type connectors and earths, which are frequently neglected.
"Lucas RCAZ 11 /7 or Exide 6-XAZ 11 R or Exide 6-XAZ 13 R", 60Ah. Measure the old one, noting any codes on it. "positive on the left" means , looking at the long side with the terminals on the side closest to you, +ve on left. Grease the terminals lightly after wire brushing before connecting. Clean the connectors, especially the earth lead at both ends.
Bears repeating - for little used cars an annual inspection and cleaning of electrical connections will help to keep you proceeding. I use a local product Deoxit on spade type connectors and earths, which are frequently neglected.
Last edited:
classicalgreen
Active Member
would keep clean until terminals /wires fitted THEN apply vaseline over surfaces. grease /oil between terminal surfaces creates resistance .drops voltage etc
I use a Bosch battery .Installed approx 10 years ago -starting to need a recharge every 3 weeks these days ( low temps not helping ) so far as sealed its never needed replacing or attention. must have a peek one day and make a note rating .would def buy another though terminals on battery are wrongly handed so I don't screw cover on and battery only 'just' fits battery tray box.
I use a Bosch battery .Installed approx 10 years ago -starting to need a recharge every 3 weeks these days ( low temps not helping ) so far as sealed its never needed replacing or attention. must have a peek one day and make a note rating .would def buy another though terminals on battery are wrongly handed so I don't screw cover on and battery only 'just' fits battery tray box.
DaveRover3500s
Active Member
As per Colnerov. Tayna batteries Bosch S3 and S4 perfect fit and good crank speed never had an issue.
mikecoombs
Well-Known Member
Measure your top clamping frame. there are two slightly different sizes. Also if you have a plastic battery box they're also slightly smaller and need a correspondingly smaller battery. Try and get the most powerful battery that will fit.
DaveRover3500s
Active Member
The Bosch S4 025 is a perfect fit - even better than a similar fitting Lucas battery I once tried. See pic - very reasonable price quick delivery (for me always been good I have purchased 6-8 batteries for my cars and friends). It’s 60ah and 540a crank power which for my 3500S (which has very good compression readings) I find cranks it no bother! Has 4 year guarantee and 5 star reviews. I use a negative side cut off switch which also helps keep battery healthy - no car battery can handle deep discharge as we know. Its biggest battery that can fit in the Rover battery box and lid fits on as it should.
Hope this is helpful.
Dave
Hope this is helpful.
Dave
