Battery Leaking - 4th Replacement - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

djrbash · 01-13-2019, 02:25 PM

Has anyone experienced battery leaking issues with the BRZ? I have had my battery replaced under warranty 4 times now and the issue occurred again after less than 8 months.

Each time I have gotten a replacement OEM subaru battery. I am now concerned with the leak effecting rust in the engine bay.

humfrz · 01-13-2019, 02:52 PM

Quote:

Originally Posted by djrbash

Has anyone experienced battery leaking issues with the BRZ? I have had my battery replaced under warranty 4 times now and the issue occurred again after less than 8 months.

Each time I have gotten a replacement OEM subaru battery. I am now concerned with the leak effecting rust in the engine bay.

No, not on my 2013 FR-S.

Where is the battery leaking? Out the fill places? Around the posts? From a crack in the case?

Is the battery secured properly?

It could be that the battery is overfilled.

It could be that the alternator is overcharging it, causing it to boil over.

humfrz

Summerwolf · 01-13-2019, 03:03 PM

With that many replacements it is likely an undiagnosed issue with the car itself IMO.

Grady · 01-13-2019, 03:36 PM

Overcharging? Have them check the charging voltage.

Grady · 01-13-2019, 03:37 PM

And yes due multiple cleanings with baking soda and lots of water!!!!!!

guybo · 01-13-2019, 03:47 PM

Have the alternator tested. Not just voltage and amperage, get a full charging system check

22R · 01-13-2019, 04:09 PM

Leak in the same spot ? Something rubbing it ? Gotta find the source the leak and see if it is common and if it is what could be causing it.

22R

Ultramaroon · 01-13-2019, 04:19 PM

I bet that they were all damaged by the guy who installed them. The seal between the soft lead posts and case are extremely vulnerable. Few people consider that when tightening the connectors.

ls1ac · 01-13-2019, 04:41 PM

If it is a crack then mounting or bad install.
If out of the cap vent then over charging.
After four times I would thing you would want to know where the leak is coming from.
After four times I would think the dealer would look at the battery carefully.

RZNT4R · 01-13-2019, 05:06 PM

Quote:

Originally Posted by guybo

Have the alternator tested. Not just voltage and amperage, get a full charging system check

What is a "full charging system check"?

djrbash · 01-13-2019, 05:26 PM

Thanks for the responses guys. Here are some pics of the battery. The leak seems to be coming from the two fill ports. Also the negative post has a bluish hue and also seems to be leaking. The rust is an accumulation of the 4 batteries failing on me.

The alternator overcharging could be a good guess as to what is causing this. What type of test can be done to check on this?

22R · 01-13-2019, 05:31 PM

Put a volt meter on it while idling and see if it is close to 14V. If you can hook up a scan tool or gauge to the ODDB2 port and read the Volts while driving to see if it exceeds 14V

22R

Grady · 01-13-2019, 07:46 PM

If it is coming out the vents it is the probaby from overcharging. If you have a volt meter put it on the battery when running. You are looking for around 13.8 to 14.2 volts. It should be stable even at high rpm’s. Everything needs to be cleaned with baking soda and lots of water.

djrbash · 01-13-2019, 08:21 PM

Just got a multimeter on it. With the car idling(no auxiliaries). It showed 14.4 volts consistently which is around normal voltage.

I'll try to get my OBD reader and measure voltage during a drive cycle. Could be overcharging then. I'll report back with my findings.

01-13-2019, 02:25 PM	#1
djrbash Member Join Date: May 2015 Drives: BRZ Premium GBS Location: Glendale Posts: 34 Thanks: 6 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Battery Leaking - 4th Replacement Has anyone experienced battery leaking issues with the BRZ? I have had my battery replaced under warranty 4 times now and the issue occurred again after less than 8 months. Each time I have gotten a replacement OEM subaru battery. I am now concerned with the leak effecting rust in the engine bay.

01-13-2019, 04:19 PM	#8
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,865 Thanks: 52,120 Thanked 36,513 Times in 18,917 Posts Mentioned: 1106 Post(s) Tagged: 9 Thread(s)	I bet that they were all damaged by the guy who installed them. The seal between the soft lead posts and case are extremely vulnerable. Few people consider that when tightening the connectors. __________________ service manuals

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01-13-2019, 05:26 PM	#11
djrbash Member Join Date: May 2015 Drives: BRZ Premium GBS Location: Glendale Posts: 34 Thanks: 6 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks for the responses guys. Here are some pics of the battery. The leak seems to be coming from the two fill ports. Also the negative post has a bluish hue and also seems to be leaking. The rust is an accumulation of the 4 batteries failing on me. The alternator overcharging could be a good guess as to what is causing this. What type of test can be done to check on this?

01-13-2019, 05:31 PM	#12
22R 22R Join Date: Apr 2017 Drives: 2012 Camry SE 2017 Toyota 86 Location: South Louisiana Posts: 229 Thanks: 215 Thanked 140 Times in 78 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Put a volt meter on it while idling and see if it is close to 14V. If you can hook up a scan tool or gauge to the ODDB2 port and read the Volts while driving to see if it exceeds 14V 22R

01-13-2019, 08:21 PM	#14
djrbash Member Join Date: May 2015 Drives: BRZ Premium GBS Location: Glendale Posts: 34 Thanks: 6 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just got a multimeter on it. With the car idling(no auxiliaries). It showed 14.4 volts consistently which is around normal voltage. I'll try to get my OBD reader and measure voltage during a drive cycle. Could be overcharging then. I'll report back with my findings.

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