Weird issue with M6.

[Ratslaaf]

The alternator voltage should not fluctuate at all with varying loads.

You should replace that voltage regulator pack asap or you might cause damage to other electronic modules. The battery will also not like a charge voltage 15.5 V and you already know what a new battery costs.

+1, which is what I've been saying all along :rollsmile:

 

[Pho3niX90]

So started stripping until this greeted me

Needles to say I am going to replace the radiator as well now. Will also go @Ratslaafs way and remove the front end and clean everything. The amount of grass and bugs trapped between the radiator, oil coolers and condenser is mind blowing.

 

[Ratslaaf]

Einaaaaa, that's gonna suck. You don't think the guys can pressure test it for you and solder the hole up again? That being said, it looks like a stress point on the radiator so probably not a good idea.

Great stuff stripping your car, I've found it to be the only way to really get to know something.

Just some advice, something that both Peter and I share for some reason, keep screws in individual little boxes for each part. There's nothing more frustrating than assembling the front cosmetics, only to wonder which screw goes where. And no, you won't remember where it went when you stripped it, don't lie to yourself :roflol:

 

[QikNish]

hi... I had this issue with my M6. its the alternator. the problem is intermittent at first but it will completely fail. Change the alternator asap before you mess up a module.

 

[Pho3niX90]

Einaaaaa, that's gonna suck. You don't think the guys can pressure test it for you and solder the hole up again? That being said, it looks like a stress point on the radiator so probably not a good idea.

Great stuff stripping your car, I've found it to be the only way to really get to know something.

Just some advice, something that both Peter and I share for some reason, keep screws in individual little boxes for each part. There's nothing more frustrating than assembling the front cosmetics, only to wonder which screw goes where. And no, you won't remember where it went when you stripped it, don't lie to yourself :roflol:

Do you know who fixes them? Goldwagen stocks absolutely nothing for this car, and bmw wants just over 11K for a new radiator. It's leaking on the other side of the radiator as well so hoping they can fix it.

 

[Hugo_za]

Einaaaaa, that's gonna suck. You don't think the guys can pressure test it for you and solder the hole up again? That being said, it looks like a stress point on the radiator so probably not a good idea.

Great stuff stripping your car, I've found it to be the only way to really get to know something.

Just some advice, something that both Peter and I share for some reason, keep screws in individual little boxes for each part. There's nothing more frustrating than assembling the front cosmetics, only to wonder which screw goes where. And no, you won't remember where it went when you stripped it, don't lie to yourself :roflol:

Do you know who fixes them? Goldwagen stocks absolutely nothing for this car, and bmw wants just over 11K for a new radiator. It's leaking on the other side of the radiator as well so hoping they can fix it.

Welcome to the world of niche models Between the 6er and the 7er I made peace a long time ago that parts are going to be (1) pricey and (2) scarce Check out the radiator prices on FCPEuro. LINK $294 for the Behr radiator and $137 UPS Expedited wordwide = +- R5300. Vat and duty will be another +- R1400.

 

[momo1]

Einaaaaa, that's gonna suck. You don't think the guys can pressure test it for you and solder the hole up again? That being said, it looks like a stress point on the radiator so probably not a good idea.

Great stuff stripping your car, I've found it to be the only way to really get to know something.

Just some advice, something that both Peter and I share for some reason, keep screws in individual little boxes for each part. There's nothing more frustrating than assembling the front cosmetics, only to wonder which screw goes where. And no, you won't remember where it went when you stripped it, don't lie to yourself :roflol:

Do you know who fixes them? Goldwagen stocks absolutely nothing for this car, and bmw wants just over 11K for a new radiator. It's leaking on the other side of the radiator as well so hoping they can fix it.

Silverton Buddy
I was quoted 9k for a radiator on my old 1er, the service manager at BMW suggested I try Silverton, apparently they supply the same Radiator, I ended up saving atleast 5k excluding the fittig cost from BMW which would be +/-R1500

 

[terrencem5v10]

There was an ad on gumtree recently,stocked alot of bmw radiators

 

[Pho3niX90]

Nope. New alternator and still reading voltage the same. So clearly not that.

 

[Ratslaaf]

Well shit. You saying voltages are all over the place when the load changes? You measuring across the battery? Or you measuring across the jumper points?

It might very well be a loose connection in the charging circuit. Poor connections have a higher resistance, thus a bigger voltage drop, leading to similar symptoms.

 

[Pho3niX90]

Im testing via obd port while I am driving. On idle it still sits around 14.4

 

[terrencem5v10]

not sure if yo did this already but check the power cables and IBS.

 

[Ratslaaf]

Hey Shaun,

What's your weekend like? Let's see if we can get together and have a look at this.

 

[Pho3niX90]

Hey Shaun,

What's your weekend like? Let's see if we can get together and have a look at this.

It's open the weekend :rollsmile:

On another note, I think the readings from the obd are incorrect. With car switched off it reads 12.3, then jumps to 12.8, then 13.3 then it starts the loop all over again.

 

[Ratslaaf]

I've got a bunch of guys coming over on Sat, including another M6. You welcome to pull in so we can put this to bed, and have a little social

That being said, the voltage on the OBD port is not a good measure at all. There's many electrical systems inside the car and large voltage drops there is not unusual. When you quoted voltages earlier I assumed you measured this with a Multimeter on the charging points in the engine bay.

 

[Pho3niX90]

Yes the original was from the engine bay, but I wanted to test while driving my usual commute to work and so forth to see what's happening.

Okay cool, send me the details and I will pop by.

Any suggestions how I can take voltages properly while driving?

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