ToyotaV8 diesel 70 series – battery advice wanted.

Submitted: Tuesday, Jun 22, 2010 at 13:24

ThreadID: 79542 Views:3892 Replies:7 FollowUps:4

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Battery Power

In this article we explain why you might need an additional power source independent of the starting battery installed into your vehicle and we look in detail at types of batteries,

Dennis Ellery

I am seeking information from owners of the Toyota 4.5 litre, diesel V8, 70 series vehicles.
I have just had a USA manufactured, good quality, flooded wet cell, deep cycle battery fail after 2 years use. It was maintained well and only had a light load from part time use on a 40 litre Engle. The engine bay of the V8 is hot and the location behind the starter battery is the hotter spot and I am leaning towards the idea that this temperature may have shortened its life (though it may have just been a dud)
I am not after advice on what batteries have been used in other models of vehicles, Toyota or otherwise (only the V8, 70 series), or of batteries mounted in other locations in the vehicle.
Q1. Have any V8 – 70 series owners had bad experiences with batteries in the auxillary battery location under the bonnet and if so what was the battery make and life in service?
Q2. Have any had good experiences and if so what was the battery make and life in service?
Any help appreciated.

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Reply By: Member -Pinko (NSW) - Tuesday, Jun 22, 2010 at 13:35

Tuesday, Jun 22, 2010 at 13:35

Hi Dennis
I understand that you cannot charge a deep cycle battery and a cranking battery in parallel. Is this what is happening under the bonnet.
Stan

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AnswerID: 421740

Follow Up By: Dennis Ellery - Tuesday, Jun 22, 2010 at 13:44

Tuesday, Jun 22, 2010 at 13:44

Hi Stan,
As I understand thats how most of them are charged when located under the bonnet - via a voltage sensing relay. Especially 2 flooded wet batteries.
Thanks for the thought.
Dennis

FollowupID: 692140

Follow Up By: Member - Kevin B1 (WA) - Tuesday, Jun 22, 2010 at 17:57

Tuesday, Jun 22, 2010 at 17:57

I am doing just that with my 76 Series with no problems at all. Am in Cairns at the moment after a trip to the Cape and my deep cycle second battery has been performing very well running two 40 ltr Engel's. I set mine up almost two years ago and haven't had any problems at all.

FollowupID: 692157

Reply By: Member - joc45 (WA) - Tuesday, Jun 22, 2010 at 18:12

Tuesday, Jun 22, 2010 at 18:12

Hi Dennis,
Not quite the answer you're looking for (I have a turbo diesel Patrol), but the shortest life I had from a flooded wet-cell deep-cycle battery was 2 years, and that was an expensive 115AH American-sourced battery. The current one (70AH marine) has been there for over 4 years and still reasonable.
I have a heat shield around mine to help keep heat from the turbo away from the battery. Maybe I was just unlucky with the expensive one.
Cheers,
Gerry

AnswerID: 421763

Reply By: Ozhumvee - Tuesday, Jun 22, 2010 at 18:26

Tuesday, Jun 22, 2010 at 18:26

Remember too that 70 series Toyota's from day one in 1985 have had high underbonnet temps which decreases battery life.
Toyota fitted additional vents and insulated battery boxes to some models due to the heat affecting batteries.
The problem was solved to some extent when they fitted the 1HZ in 1990 as the exhaust was moved to the drivers side away from the battery.
I got sick of replacing the auxilary battery from the rear LH corner after 18 months average and shifted it under the rear seat in the troopy to get it away from the heat.

AnswerID: 421769

Reply By: Member - Norm C (QLD) - Tuesday, Jun 22, 2010 at 20:15

Tuesday, Jun 22, 2010 at 20:15

Dennis, I've had a 90 AH Fullriver AGM in the aux battery position of my V8 TD 70 Series for just under two years. Before that, the same battery was in the aux battery position of a 2005 TD Hilux for about two years. In both vehicles it is isolated from the starter via a Redarc and is in parallel with a 120 AH AGM in the back of the vehicle.

Battery is still performing fine. The two AGMs power two 40 Litre Engels which are generally both on freeze.

Norm C

AnswerID: 421779

Reply By: Member - Stuart P (WA) - Tuesday, Jun 22, 2010 at 21:17

Tuesday, Jun 22, 2010 at 21:17

I fit these delco batteries to all the troop carrier emergency vehicles that come thru the workshop. I have very few failures, these batteries charge in parrallel via a rotary cole-hersee switch.

AnswerID: 421789

Follow Up By: Dennis Ellery - Thursday, Jun 24, 2010 at 16:52

Thursday, Jun 24, 2010 at 16:52

Auto Sparky - thanks for the info.
Whats your phone number or email address - I will talk to you about fitting a battery to my Troopy.

FollowupID: 692362

Follow Up By: Member - Stuart P (WA) - Sunday, Jun 27, 2010 at 18:56

Sunday, Jun 27, 2010 at 18:56

0418945847

FollowupID: 692658

Reply By: Member - Serendipity(WA) - Tuesday, Jun 22, 2010 at 21:18

Tuesday, Jun 22, 2010 at 21:18

I have an auxillary battery in the only location under the bonnet of my V8 79 series now for about 2 years. The battery was an extra one from my boat and has run all sorts of extra power outlets. Often a 40lt engel. I have at stages run the battery down to extremely low levels that I thought would stuff the battery but did not.

You might have just had a dud. Have you checked your warranty - often you can claim.

David