Hi, we have a T5 and have a battery issue. When the engine is at ambient temperature it starts ok and if I turn it off whilst engine still cool, it starts again fine. However, when the engine is warm after a drive, the battery has drained after about 10 mins. There doesn't seem to be a parasitic drain and I've cleaned the terminals on the battery. Might it be an issue with the fan or pump that continue after engine shutdown? Any thoughts greatly appreciated!
Flat battery after 10 mins.......but only after engine is warm.
- Thread starter Kippers
- Start date
Have you checked to see if you can hear / see a pump or fan running?
Does the pump stop eventually or just keep running, hence the flat battery?
The auxiliary cooling pump / pumps are supposed to run after the engine stops and are controlled via a temperature switch.
There have been previous cases of the pumps continuously running and flattening the battery.
Have a Search
EDIT: The battery still shouldn’t be flat after running a small electrical pump for 10 minutes so it maybe you also have a defective battery which needs load testing / replacement. Also check the main earth strap on the right hand side engine mount.
Apparently, the battery had only recently been fitted. It's a Yuasa YBX3096 (76Ah, 680A) so should have been ok but could be a duffer.
If theres nothing draining it and it goes flat then the battery must be duff
Still does not make sense - your first post stated that you had "cleaned the terminals on the battery".
I should have been clearer. It was one of the conductors/terminals that attaches to the battery from the vehicle that they changed (apologies if wrong terminology, I'm not a mechanic - the brass connector shown in pic). I had cleaned it up as best I could removing as much crap as possible but changing it seems to have done the trick. Battery was absolutely fine.
