325i cooling

Post Tue Jun 27, 2006 4:58 pm

Hi have a 325i trackday car and want to upgrade the cooling system to prevent over heating on heavy track use. I was thinking a 535 rad and electric fans. Any ideas.
Thanks for your time dave

Post Tue Jun 27, 2006 5:04 pm

If the engine is standard, just keep the standard cooling in good nick, and it will not overheat. If it does, something is wrong! Even when given absolute hell, an M20 engine in good nick should not show much over halfway on the water temperature indicator.

An over-cooled engine is not a good thing either, unfortunately.

Post Tue Jun 27, 2006 5:08 pm

Hi the engine is standard but the gauge nundges slighly over centre(in between 1/2 and 3/4) max after several laps, just a precaution really. would prefer a fan on a switch rather than the bmw one.
dave

Post Tue Jun 27, 2006 5:27 pm

How about a rad from a E28 535 ?

with elec fan from E32

ED

Post Tue Jun 27, 2006 11:20 pm

Radiators are 100,000 mile service items. Try a new standard one.

Post Wed Jun 28, 2006 9:07 pm

Have you tried flushing it out? You'd be surprised how much crap comes out.

Post Wed Jun 28, 2006 10:32 pm

Adammcf wrote:Have you tried flushing it out? You'd be surprised how much crap comes out.

You'll be surprised how much crap DOESN'T come out. That's why they're service items.

Post Wed Jun 28, 2006 11:10 pm

oh brian i bet your coolant is cleaner than tap water?!

Post Wed Jun 28, 2006 11:29 pm

Tap water dont you use distilled water in your cooling system

ED

Post Wed Jun 28, 2006 11:33 pm

yes i do with central heating cleaner/ additive in it too