---------------------------------------------------------- Kitfox-List Digest Archive --- Total Messages Posted Wed 10/06/10: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:58 PM - coolant boilover problem (Tucsonchris) 2. 02:34 PM - Re: coolant boilover problem (Pete Christensen) 3. 03:24 PM - Re: coolant boilover problem (Tucsonchris) 4. 04:42 PM - Re: Re: coolant boilover problem (Lowell Fitt) 5. 07:33 PM - Tundra Tires (Carolina Flyer) 6. 08:31 PM - Re: coolant boilover problem (Roger Lee) 7. 09:25 PM - Re: Re: coolant boilover problem (Guy Buchanan) ________________________________ Message 1 _____________________________________ Time: 01:58:45 PM PST US Subject: Kitfox-List: coolant boilover problem From: "Tucsonchris" I have just 30 minutes of runtime on my 912s. Did some taxiing yesterday and when I shut down I heard a big hissing in front. Got out and saw coolant pouring out the bottom--looked inside the inspection door and saw coolant screaming out from under the pressure cap (the metal one). This continued until the engine cooled down. My CHT's at the time were around 165. All other engine readings were normal. All hose fittings are secure. How could the pressure build so high as to bust open the pressure valve on the cap? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=314957#314957 ________________________________ Message 2 _____________________________________ Time: 02:34:12 PM PST US From: Pete Christensen Subject: Re: Kitfox-List: coolant boilover problem Maybe your cap is not holding the proper pressure. I believe 17 psi is the proper cap. The previous owner had a 6 psi cap on mine and it did also boil over. Pete On 10/6/2010 3:55 PM, Tucsonchris wrote: > --> Kitfox-List message posted by: "Tucsonchris" > > I have just 30 minutes of runtime on my 912s. Did some taxiing yesterday and when I shut down I heard a big hissing in front. Got out and saw coolant pouring out the bottom--looked inside the inspection door and saw coolant screaming out from under the pressure cap (the metal one). This continued until the engine cooled down. > > My CHT's at the time were around 165. All other engine readings were normal. All hose fittings are secure. How could the pressure build so high as to bust open the pressure valve on the cap? > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=314957#314957 > > ________________________________ Message 3 _____________________________________ Time: 03:24:23 PM PST US Subject: Kitfox-List: Re: coolant boilover problem From: "Tucsonchris" Interesting possibility. However, my engine is factory new and I have no reason to believe that Rotax installed the wrong cap. I also have a heater core installed in parallel with the plumbing. Can a large air pocket cause the effect? Basically expanding so as to push the fluid to capacity in the overflow bottle and leaving the fluid no where else to go? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=314967#314967 ________________________________ Message 4 _____________________________________ Time: 04:42:31 PM PST US From: "Lowell Fitt" Subject: Re: Kitfox-List: Re: coolant boilover problem Is the overflow bottle vented? The reason I ask is that I overfilled once and the excess came out of the bottle vent. Lowell -------------------------------------------------- From: "Tucsonchris" Sent: Wednesday, October 06, 2010 3:21 PM Subject: Kitfox-List: Re: coolant boilover problem > > Interesting possibility. However, my engine is factory new and I have no > reason to believe that Rotax installed the wrong cap. I also have a heater > core installed in parallel with the plumbing. Can a large air pocket cause > the effect? Basically expanding so as to push the fluid to capacity in the > overflow bottle and leaving the fluid no where else to go? > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=314967#314967 > > > ________________________________ Message 5 _____________________________________ Time: 07:33:58 PM PST US Subject: Kitfox-List: Tundra Tires From: "Carolina Flyer" Hello Everyone, I have seen many people have the Carlisle golf cart tires on a 6" rim and call them Tundra Tires.... They are Heavy and Stiff, and the size is all I see that is close to being what is referred to as a Tundra Tire.....The Carlisle Tire is a very good tire, but I do not think it Preforms like Real Tundra Tires do....These Tires I have are Soft and only use between 5 and 10 pounds of air, and they are Light Weight........... They act like the Big Boys Tundra Tires in Alaska...... The Rims I have are 8" in Diameter, and fit on Black Max and Hegar wheel hubs, and maybe others..... Anyway I would like your input on what you think about my Tire and Wheel Combo........ If anyone thinks they would like to have a set for their Kitfox send me an e-mail..... These work Fantastic on my Kolb, and I even sold a set to Rotax Rick that is on Barnstormers..... He is a Rotax Repair Center down in Florida.... Anyway he has a set on his Quicksilver that has a Rotax 670, and he loves them. I think these have been the best mod I have done on my Kolb Firestar II....... Joe -------- Kolb Firestar II 503 C-Box / RK400 Clutch Phantom 503 B-Box Read this topic online here: http://forums.matronics.com/viewtopic.php?p=314991#314991 Attachments: http://forums.matronics.com//files/dsc00454_large_198.jpg http://forums.matronics.com//files/dsc00443_large_141.jpg ________________________________ Message 6 _____________________________________ Time: 08:31:33 PM PST US Subject: Kitfox-List: Re: coolant boilover problem From: "Roger Lee" CHT's and water temps are usually within a few degrees. So at 165F you should not have a boil over unless the cap was not screwed on straight or the cap is bad. It can happen. Take the cap off and put it back on. Run the engine again and if it boils over replace the cap. I take it you are using a 50/50 coolant mix? The other thing on my mind is are you sure the 165F was correct? -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=314998#314998 ________________________________ Message 7 _____________________________________ Time: 09:25:55 PM PST US From: Guy Buchanan Subject: Re: Kitfox-List: Re: coolant boilover problem On 10/6/2010 3:21 PM, Tucsonchris wrote: > I also have a heater core installed in parallel with the plumbing. Can a large air pocket cause the effect? Basically expanding so as to push the fluid to capacity in the overflow bottle and leaving the fluid no where else to go? > I think you've nailed it. -- *_Guy Buchanan_* Scoutmaster -- Troop 680 760.809.6145 scoutmaster@troop680.org www.troop680.org ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kitfox-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kitfox-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/kitfox-list Browse Digests http://www.matronics.com/digest/kitfox-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.