B230FD Problems :)

[Volvo940GL]

Originally Posted by Laird Scooby

Time to replace the alternator from the sound of things. May as well try to find a 100 or 120A unit while you're about it....................

100 or 120a hmm

I could try

Thanks

[Volvo940GL]

Originally Posted by Laird Scooby

Time to replace the alternator from the sound of things. May as well try to find a 100 or 120A unit while you're about it....................

This one will fit. 100a
Fits 940
Just modifying that small red cable.

[aardvarkash10]

Originally Posted by Volvo940GL

This one will fit. 100a
Fits 940
Just modifying that small red cable.

yup. Standard unit on the later model turbo engines.

Some things to note that may or may not bother you.

The parts for this unit are significantly more expensive and harder to source than for the unit you already have. For the price of a basic rebuild kit for the 100A unit you can buy a complete remanufactured 65A unit.

The design of the 100A unit is, imo, inferior in some ways. My biggest gripe is the slip rings are about half the diameter of the slip rings on the 65A unit. This means they wear out about 3 times faster. Its quite a faff-about to replace the slip ring unit itself as well.

While the unit is rated at 100A, the majority of the time every alternator is typically running at less than 10A for battery charging and the balance for vehicle operation. In my 940 that vehicle operation, lights on engine running occasional heater/air-con etc is about 20A maximum.

So, typically less than 50% of the capability of a 65A alternator.

Good luck getting the 100A to run at full output through one drive belt too!

If it were me, I would stick with the 65A unit. Operating correctly it is an entirely capable device.

[Volvo940GL]

Originally Posted by aardvarkash10

yup. Standard unit on the later model turbo engines.

Some things to note that may or may not bother you.

The parts for this unit are significantly more expensive and harder to source than for the unit you already have. For the price of a basic rebuild kit for the 100A unit you can buy a complete remanufactured 65A unit.

The design of the 100A unit is, imo, inferior in some ways. My biggest gripe is the slip rings are about half the diameter of the slip rings on the 65A unit. This means they wear out about 3 times faster. Its quite a faff-about to replace the slip ring unit itself as well.

While the unit is rated at 100A, the majority of the time every alternator is typically running at less than 10A for battery charging and the balance for vehicle operation. In my 940 that vehicle operation, lights on engine running occasional heater/air-con etc is about 20A maximum.

So, typically less than 50% of the capability of a 65A alternator.

Good luck getting the 100A to run at full output through one drive belt too!

If it were me, I would stick with the 65A unit. Operating correctly it is an entirely capable device.

That’s what I thought, it won’t fit 100% but it’s worth it, I could use another 65amp, but I bought that 100ampere for 133£

I’d say if those lights in my dashboard doesent disappear after the new installation 100amp. id return that new alternator and use my old one again. But I hope the alternator is the problem. Enabling the heater for rear window on and off changes the idle rpm. So it means it doesent give the right voltage? My headlights dim when the car almost dies. Never had this problem before.

It’s worth trying though

Thanks

[Laird Scooby]

Originally Posted by Volvo940GL

This one will fit. 100a
Fits 940
Just modifying that small red cable.

No modification needed, just pull it off the ring to male spade adaptor then fit it into the field (D+) terminal on the new one.

Worth bearing in mind what Ash has said though, he's not wrong

That said, if you do a lot of short runs and/or will be running amplifiers/subs etc a bigger alternator would be useful.

If memory serves the 85A version uses most of the same parts as the 65A (except the stator) so that might be a better compromise all round.

[Laird Scooby]

Originally Posted by Volvo940GL

But I hope the alternator is the problem. Enabling the heater for rear window on and off changes the idle rpm. So it means it doesent give the right voltage? My headlights dim when the car almost dies.
Thanks

Not giving any output at all from the sound of things.

[Volvo940GL]

Originally Posted by Laird Scooby

Not giving any output at all from the sound of things.

So it means swapping alternator may help.
I’m excited to see it run with a new alternator.

What about the tighteningbolt?

[Laird Scooby]

Originally Posted by Volvo940GL

So it means swapping alternator may help.
I’m excited to see it run with a new alternator.

What about the tighteningbolt?

WHat about it? Assuming the alternator you've bought is for a Volvo Red Block, it should fit.

Please don't tell us you picked an alternator at random and bought it?

[Volvo940GL]

Originally Posted by Laird Scooby

WHat about it? Assuming the alternator you've bought is for a Volvo Red Block, it should fit.

Please don't tell us you picked an alternator at random and bought it?

No no not at all, it’s not random !
I was looking around

[Volvo940GL]

Originally Posted by Laird Scooby

WHat about it? Assuming the alternator you've bought is for a Volvo Red Block, it should fit.

Please don't tell us you picked an alternator at random and bought it?

The most idiotic design ever on that alternator, it needs to be modified to fit the bracket that tightens the belt. Stupid!!!! >
Then I have to make my custom bracket