Engine carbonising
 

Hi all, I would appreciate some advice on a query about engine carbonising.

Currently in Japan it's winter and my RX8 has run flat as registration has run out. It's been sitting in the carpark at my apartment and I turn it over once a week for 30 mins to keep engine going and the battery charged up. This morning with the cold temps my battery has run flat.

What I am wondering is how long is the engine ok to not be turned over before possible carbonising begins? I just want to keepthe car in as good possible condition as I can until I export it soon (hence not renewing the registration).

Any answers would be much appreciated.

Regards

Wrcfan

Carbon doesn't form from not running the engine. However your fuel might go bad and cause all sorts of problems. You can always seafoam it which you might want to do since your just idling it and not driving it to clear out the engine.

like Doc said, Carbon will not form like that.

what you should be afarid is water condensation, if you let the engine sit long enough, water will form(because air naturally has water) and it will rust the rotors. but that will take at least 1/2 year to 1 year before it happens (or unless you have a coolant seal leak, but thats another story)

30 Minutes of "idling engine" is not enough to recharge the battery, each "spark/crank" equals to 3-5 minutes of charging time. not to mention Alternator's peak efficiency usually happens at around 2500-3000 rpm. so idling engine will not generate a lot of power.

so if you're not going to drive your car at least 1 month, take the battery away, bring it home and keep it warm, it will help to save the battery. even better if you have a charger/conditioner.

Thanks for the replies. If the battery is flat and I just remove it, get a new one and keep it indoors is best. There are a few weekends where I will get a temporary permit to drive it on the road despite the car not having a registration. The times I will drive it just connect the battery up and then use it. If the battery is removed the G-Reddye-throttle and other car electrics will be fine despite not having had the battery installed? I'm a real newbie to the rotary world so apologies for the silly sounding questions. All the advice is very much appreciated!

Kind regards

Wrcfan

removing your battery for that period of time will reset a lot of things. Fuel Trims, Radio, you will have to recalibrate your steering wheel, and the idle will be rough for a couple of drives. Another option you have is solar powered battery tenders. Like so - http://compare.ebay.com/like/3305165...=263602_304662

otherwise well I dont know what all electronics you have?

Thanks for the link on the solar power battery tenders! They look like a great way to go. I am reading frantically to try and get up to speed on as much information as I can. It is the wrong time of year to have the registration run out on it, sitting in cold weather is no fun for any car.

The electrics in the car are pretty standard except for the e-thottle which is wired in as well as a G-Reddy infometer. These products were sold and installed by RE-Amemiya and there is little to no information except (1 paragraph) in Japanese. The joys of living in Japan eh, haha.

Regards


WRCfan