Patrol 4x4 - Nissan Patrol Forum banner

1 - 20 of 22 Posts

·
Registered
nissan
Joined
·
246 Posts
Discussion Starter #1
Hi guys and happy new year. I have 2 batteries in my patrol, the car is orginaly with 4,2 TDI Nut now it has 2,8 TDI But I noticed that 1 one battery has only the + connected the - is just hanging there. Do you know if the 4,2 has 24V starting or is is it 12V???
 

·
i like it dirty
nissan patrol
Joined
·
1,325 Posts
24V is when the - of the main battery is going to the + of the second battery,

When the + of the aux battery is going to the + of the main battery that is when there running in series, and im pritty sure that just gives your a higher CCA
 

·
Registered
nissan
Joined
·
246 Posts
Discussion Starter #3
Well my question was actually just. Is it 24v or 12v start in the 4,2 engine? Maybe I didn´t write it correct ;)
 

·
Registered
Joined
·
331 Posts
i think what jaido is saying is go have a look, if it is 24 v then the + that is connectedwill run back to the - terminal of the first battery, If it is 12 then it will run to the starter motor or some other place. Get it?

Apart from that i could tell you 100% either way i have a 4.2 and it is 12v but i think there is a 24v one too
hope that helps
 

·
Registered
nissan
Joined
·
246 Posts
Discussion Starter #5
I took a look and saw that is connected as 12V Just need to connect the - on the second battery. I´ll guess that the guy who switched engines had forgotten to connect the - the battery. But thanks for answers ;)
 

·
KICKEN BACK IN THE BUSH
nissan gq
Joined
·
4,690 Posts
Quick check save confusion
If its 12 V
It will go "-" to earth, then "+" straight to starter

IF its 24 V
It will go "-" to earth, then "+" will go to "-" on the other battery then "+" to the starter
 

·
Safari Hoarder
nissan
Joined
·
4,775 Posts
Y60 Safaris came in low and high roof.

Never heard of swapping out the 4.2 for the 2.8. If you have the original dash, look at the voltmeter.
 

·
i like it dirty
nissan patrol
Joined
·
1,325 Posts
if your volt meter goes upto 36v its a 24v.

pritty sure safaris are the only 24vs patrols out there
 

·
Registered
nissan
Joined
·
246 Posts
Discussion Starter #13
The volt goes to 14V but. i was just wondering if the original 4,2 uses 24V when you are staring her. Then runs on 12V Some cars have 24 starting system. But are running at 12V tha means that they wil only use 24v when the engine is staring up. ;) The raeson for the engine swap is that the guy used the 4,2 engine in another patrol. So the 2,8 comes from the car who got the 4,2 I would just kept the with the 4,2 and sold the car with 2,8 But anyway. After some lokking yesterday I saw that the car has only 12V :)
 

·
Safari Hoarder
nissan
Joined
·
4,775 Posts
If it starts ok on 12v, it must be 12v, if the starter was 24v it wouldn't start on 12v.:doh:
Don't know of any 24 volt 2.8s :idiot:

In 1995, Safaris changed to 12 volt systems except the starter remained 24 volt.
 

·
Quickest Tyre Deflator On The Market
nissan
Joined
·
3,026 Posts
Don't know of any 24 volt 2.8s :idiot:

In 1995, Safaris changed to 12 volt systems except the starter remained 24 volt.
Ok, so as I said, if it's a 24v starter motor, it wont turn over fast enough to start on 12v, so if it's starting on 12v, it's NOT a 24v starter:idiot:;)
 

·
Quickest Tyre Deflator On The Market
nissan
Joined
·
3,026 Posts
Did you read the part where he has a 2.8?
Yep, the way I see it, it was a 24v start 4.2, now it has a 2.8 with a 12v start that is why it has 12v neg and 12v pos to the starter, and the other battery is not in use, yes??
or have I lost the plot?:D.either way I'd be making sure before I hooked the other battery into the system, 12v starters don't like 24v.
 

·
i like it dirty
nissan patrol
Joined
·
1,325 Posts
just look at the alternator

see if that says 12v or 24v.

a 12v alternator in a 24v car, i dont think it would do to well
 

·
Safari Hoarder
nissan
Joined
·
4,775 Posts
The alt would have to be 12 volt. its the connection of the batteries that I am wondering about and would not connect them both until sure.

jeepson, are the batteries on the same side of the engine bay?
 

·
Registered
nissan
Joined
·
246 Posts
Discussion Starter #20
the batteries are on each side of the engine. But anyway It has nothing to with the altenator. Some car have 24V for the starter but everything else in the car is running on 12V But I was looking at it and I saw that the car didn´t have 24V start when the 4,2 was in it. Just need to connect - on the battery on the left side of the car to the boddy or the engine. And my question was actully just. Does the 4,2 have 24V start. It had nothing do with the altenator or anything. But thanks for all the answer guys ;)
 
1 - 20 of 22 Posts
Top