I consider the radiator to be "part of the system". My classic Mini doesn't have an expansion tank (the Brits laugh at such complexity, and you know how good they are at keeping a car cool!) and I can tell when it's time to fill the rad back up by the way it starts to run warm. It has a more accurate temperature gauge than a Miata, though.
Keith Tanner Flyin' Miata [EMAIL PROTECTED] http://www.flyinmiata.com <http://www.flyinmiata.com/> 1-800-FLY-MX5s (orders) 1-970-464-5600 (tech) 2008 FM Open House: August 14-17 ________________________________ From: Robert McElwee [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 25, 2008 7:52 AM To: Keith Tanner Cc: [email protected] Subject: Re: [Miata] Pinhole Leak Near Radiator Neck I could not tell from his description (not sure if I put that in my post or not) where his leak was (above or below the cap seal). I have not had any cooling issues at all. Since the takeoff is on the bottom of the radiator I shouldn't have air in the system. On Wed, Jun 25, 2008 at 9:41 AM, Keith Tanner <[EMAIL PROTECTED]> wrote: The difference is that the Red Beast's "leak" only occurs when the coolant system pressure is higher than the radiator cap pressure, wheras Bryan's leak occurs as soon as any pressure is built up at all. And in both cases, cooling suffers when there's air in the system. Keith Tanner Flyin' Miata [EMAIL PROTECTED] http://www.flyinmiata.com <http://www.flyinmiata.com/> 1-800-FLY-MX5s (orders) 1-970-464-5600 (tech) 2008 FM Open House: August 14-17 ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert McElwee Sent: Wednesday, June 25, 2008 5:59 AM To: [EMAIL PROTECTED] Cc: Miata Mailing List; Miata Power List Subject: Re: [Miata] Pinhole Leak Near Radiator Neck YMMV, but I've ran Red Beast without a overflow bottle for years (too much weight). The level stays about an inch below the top of the coils during that time and has caused no major issues. If your pressure stayed low due to a leak your water would boil sooner and bubbles don't cool like liquid does. Just make sure you keep your eyes on it. I've lived with this "leak" for quite a while. On Wed, Jun 25, 2008 at 7:08 AM, Bryan Wyatt <[EMAIL PROTECTED]> wrote: Hey all, I'm about 99% sure I've got a pinhole leak at the neck below the radiator cap (which I've recently replaced as a preventative measure). I've noticed a small mineral deposit right below the small rubber hose on the neck below the radiator cap. The leak is slight (I'm nowhere near the "Low" mark, but it's obvious that I'm losing coolant, but only enough to evaporate quickly). Any ideas? Can I fix it? I'd rather not replace the radiator. -Bryan _______________________________________________ Miata mailing list [EMAIL PROTECTED] http://list.realbig.com/mailman/listinfo/miata -- Robert McElwee and Blue Flash "The 40 MPG Miata" www.lightweightmiata.com/mpg Lightweight Miata Forum: www.lightweightmiata.com/forum The Miata Trailer Project: www.lightweightmiata.com/trailer _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower -- Robert McElwee and Blue Flash "The 40 MPG Miata" www.lightweightmiata.com/mpg Lightweight Miata Forum: www.lightweightmiata.com/forum The Miata Trailer Project: www.lightweightmiata.com/trailer
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