Yes. Either the upper or lower hose between the engine and the radiator. Sam
Sent from my iPhone 4 On Apr 12, 2011, at 5:08 PM, Bruce Labitt <[email protected]> wrote: > On 4/11/2011 10:27 PM, Sam Sharp wrote: >> Could one of the radiator hoses be collapsed internally? >> Sam >> > > Interesting. Are you thinking one of the big diameter ones? > >> On Mon, Apr 11, 2011 at 8:24 PM, Ross Kuhns <[email protected] >> <mailto:[email protected]>> wrote: >> >> Well, if the pump shaft broke or something, I still >> think you should just pull the belt and see if it >> spins very freely, or grinds or does some damned >> 'wrong' thing. >> >> Didn't you have the timing belt done recently? did >> they do the water pump too? should be under warranty >> 'if' it is the pump... >> >> >> Ross >> >> On Apr 11, 2011, at 9:13 PM, Bruce Labitt wrote: >> >> > On 4/11/2011 9:00 PM, Donni wrote: >> >> Sounds water pump-y..... >> >> >> >> >> > >> > Grumble. So it would seem. Anything else I >> *should* be fixing while I'm in there? >> > 1) water pump >> > 2) timing belt / seals >> > 3) ? >> > >> > Bruce >> > >> >> On Apr 11, 2011, at 7:33 PM, Bruce >> Labitt<[email protected] >> <mailto:[email protected]>> wrote: >> >> >> >>> On 4/11/2011 7:05 PM, Larry Alster wrote: >> >>>> For the freeze plug to be your problem you would >> have to be losing fluid >> >>>> from the system. Are you?? >> >>>> >> >>> No, I have no visible leak. I am unaware of any >> leak. My first indication of trouble was an overheat >> this spring. I let it idle to warm up. While I was >> doing something else I noticed the rad cap geysering. >> I shut it down rather quickly. When it cooled down, >> I refilled the radiator. Fired it up again and it >> overheats. >> >>> >> >>> Tried running without the cap. Did not see >> evidence of obvious flow in radiator. No obvious >> bubbles like a bad head gasket leak to coolant. >> >>> >> >>> Bruce >> >>>> >> >>>> Larry Alster >> >>>> >> >>>> 91 Miata White Knight >> >>>> 92 Miata Silver Bullet >> >>>> 92 Miata Honey B >> >>>> 04 MSM MX-5 Whooosh >> >>>> 06 WRX STi Subie >> >>>> >> >>>> >> >>>> -----Original Message----- >> >>>> From: [email protected] >> <mailto:[email protected]> >> >>>> [mailto:[email protected] >> <mailto:[email protected]>] On Behalf >> Of Bruce Labitt >> >>>> Sent: Monday, April 11, 2011 7:04 PM >> >>>> To: MiataPower >> >>>> Subject: Re: Diagnosing Bad Water Pump, or Heater >> Core or? >> >>>> >> >>>> On 4/11/2011 12:16 PM, Donni Howell wrote: >> >>>>> I may have missed it among all the replies, but >> I didn't >> >>>>> see any mention of core plugs (freeze >> plug/expansion plug >> >>>>> or whatever you choose to call them). I had a >> '96 that >> >>>>> would overheat all the time. I chased the >> problem for >> >>>>> almost a year. Replaced radiator, cap, had recently >> >>>>> replaced water pump. Nothing worked and I had >> given up. I >> >>>>> lost some coolant but never found a leak. >> >>>>> >> >>>>> One day while doing some suspension work on the >> left side >> >>>>> of the car, I noticed a rusty streak on the side >> of the >> >>>>> block - under the exhaust manifold. I followed >> that up to >> >>>>> a hole in the block where a core plug used to >> live. It was >> >>>>> a hidden leak that must have burned off any >> trace of water >> >>>>> while driving, so I never saw any water on the >> ground. I >> >>>>> replaced it with one from Mazda (2 from NAPA >> wouldn't fit >> >>>>> for some reason) and problem solved. >> >>>>> >> >>>> Nahh, did not even think about freeze plugs. Did you >> >>>> replace them with the engine in the car? >> >>>> >> >>>>> On Sun, Apr 10, 2011 at 9:58 PM, bill zimmerman >> >>>>> <[email protected] >> <mailto:[email protected]><mailto:[email protected] >> <mailto:[email protected]>>> wrote: >> >>>>> >> >>>>> Now we're at the root of the problem, why did it >> >>>>> overheat, not because of >> >>>>> the heater core. It may have had a bad radiator, >> >>>>> leaking and you didn't >> >>>>> notice it, or it might be a bad water pump, also >> >>>>> leaking and you didn't >> >>>>> notice it, either way, low on coolant and >> overheating. >> >>>>> Very good chance you >> >>>>> have a warped head and leaking head gasket >> at this >> >>>>> point, check for water in >> >>>>> the oil, oil residue in the radiator, and do a >> >>>>> compression check. Go forward >> >>>>> from there, from the way you describe it I'm >> pretty >> >>>>> sure you are going to >> >>>>> find a head gasket problem. BZ >> >>>>> >> >>>>> -----Original Message----- >> >>>>> From: [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> [mailto:[email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>>] On Behalf >> >>>>> Of Bruce Labitt >> >>>>> Sent: Sunday, April 10, 2011 7:59 PM >> >>>>> To: [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> Subject: Re: Diagnosing Bad Water Pump, or >> Heater Core or? >> >>>>> >> >>>>> On 4/10/2011 7:42 PM, bill zimmerman wrote: >> >>>>> > Late coming in on this and have not read >> other posts >> >>>>> but if your problem >> >>>>> > came after any cooling system work, hose >> >>>>> replacement, etc, make sure you >> >>>>> > don't have an air lock in the system, which >> >>>>> frequently will result in no >> >>>>> > heat from the heater while everything else >> functions >> >>>>> normally. Would not >> >>>>> > suspect a water pump problem if the motor is not >> >>>>> overheating or signs of >> >>>>> > leakage around the pump. BZ >> >>>>> > >> >>>>> >> >>>>> Original problem - overheat - radiator cap >> let go - >> >>>>> coolant >> >>>>> everywhere. Replaced cap, added water - >> trouble ever >> >>>>> since. Engine overheats. >> >>>>> >> >>>>> Could be air lock. How do you get rid of >> it? I used a >> >>>>> coolant funnel attached to radiator cap. >> Attempted to >> >>>>> squeeze hoses... Car is not level right >> now. Front >> >>>>> end is >> >>>>> on jackstands. Problem? >> >>>>> >> >>>>> > -----Original Message----- >> >>>>> > From: [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> > [mailto:[email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>>] On Behalf >> >>>>> Of Bruce Labitt >> >>>>> > Sent: Sunday, April 10, 2011 7:22 PM >> >>>>> > To: [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> > Subject: Re: Diagnosing Bad Water Pump, or >> Heater >> >>>>> Core or? >> >>>>> > >> >>>>> > On 4/10/2011 5:25 PM, Ross Kuhns wrote: >> >>>>> >> If the hoses are only a year old, they >> should come off; >> >>>>> >> take a pair of slotted type pliers/grips >> and you can >> >>>>> >> usually work them back and forth a touch as >> you pull - >> >>>>> >> tool is set perpendicular to the pipe/hose. >> Of course >> >>>>> >> don't squeeze too hard, those pipes are >> soft. If >> >>>>> you try >> >>>>> >> to confirm flow thru the core, make sure >> not to use too >> >>>>> >> much psi, system doesn't run under too much >> >>>>> pressure (what >> >>>>> >> 13psi?). >> >>>>> >> >> >>>>> >> Ross >> >>>>> >> >> >>>>> >> >> >>>>> >> >> >>>>> >> On Apr 10, 2011, at 4:34 PM, Ken Bogart wrote: >> >>>>> >> >> >>>>> >>> I would flush the heater core to verify >> flow. If its >> >>>>> >>> blocked and needs replacement, a temporary >> bypass will >> >>>>> >>> certainly work to keep you on the road. >> >>>>> >>> >> >>>>> >>> >> >>>>> >>> Ken Bogart >> >>>>> >>> ----------------------------------------------------- >> >>>>> >>> 96 Montego Blue FFS Coldside (His) >> >>>>> >>> 97 Black& Tan (Hers) >> >>>>> >>> 90 Crystal White (sons) >> >>>>> >>> ------------------------------------------------------ >> >>>>> >>> http://www.miatacare.com >> <http://www.miatacare.com/><http://www.miatacare.com/> >> >>>>> >>> http://www.cincimiata.com >> <http://www.cincimiata.com/><http://www.cincimiata.com/> >> >>>>> >>> >> >>>>> http://www.bcchallenger.org >> <http://www.bcchallenger.org/><http://www.bcchallenger.org/> >> >>>>> >>> MiataMail.com<http://MiataMail.com >> <http://miatamail.com/>> list owner >> >>>>> >>> >> >>>>> >>> >> >>>>> >>> On Sun, Apr 10, 2011 at 2:32 PM, Bruce Labitt >> >>>>> >>> <[email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> >>> <mailto:[email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>>>> wrote: >> >>>>> >>> >> >>>>> >>> I'm trying to diagnose if I have >> either a bad >> >>>>> water >> >>>>> >>> pump, or just a clogged heater core. The >> >>>>> hose at the >> >>>>> >>> output of the heater core has been >> spliced to >> >>>>> insert >> >>>>> >>> a GM temperature sensor in the line. >> [Other >> >>>>> than the >> >>>>> >>> temp sensor splice, the cooling >> system is stock.] >> >>>>> >>> The GM sensor is reading correctly - it >> >>>>> reads cold >> >>>>> >>> and the heater line *is* cold. >> However, at >> >>>>> the back >> >>>>> >>> of the head, the sensor which goes to the >> >>>>> dash reads >> >>>>> >>> very hot (after the engine has warmed >> up, of >> >>>>> course). >> >>>>> >>> It is as if there is no flow out the >> back of >> >>>>> the head. >> >>>>> >>> >> >>>>> >>> Things I've tried: >> >>>>> >>> 0. Removed thermostat, put housing >> back. Still >> >>>>> >>> overheats. Have new tstat, but have not >> >>>>> installed. >> >>>>> >>> 1. Remove GM sensor splice, and >> inspect the >> >>>>> inline >> >>>>> >>> housing. Can see daylight through >> the hose >> >>>>> >>> connections. Conclusion: temp sensor >> housing >> >>>>> is not >> >>>>> >>> clogged and not impeding coolant flow. >> >>>>> >>> 2. Added classic coolant flush tee >> in place >> >>>>> of the >> >>>>> >>> inline temp sensor. Flushed 12 >> gallons thru >> >>>>> system. >> >>>>> >>> Pretty ugly looking coolant, if I >> must say >> >>>>> so. It >> >>>>> >>> still does not quite look like clean >> water, >> >>>>> but it is >> >>>>> >>> far more water like than before. >> >>>>> >>> 3. Put back GM temp sensor. >> >>>>> >>> 4. Refilled with water. Installed a >> burp >> >>>>> bucket on >> >>>>> >>> radiator, ran engine. Filled bucket >> 1/3 way. >> >>>>> Bottom >> >>>>> >>> rad hose does not seem like it is full of >> >>>>> coolant. >> >>>>> >>> Feels like it is not uniformly hot. >> Tried >> >>>>> squeezing >> >>>>> >>> hoses, etc to burp. Not much >> happened with >> >>>>> respect >> >>>>> >>> to coolant level. Engine heated up - >> back of head >> >>>>> >>> sensor showed quite warm - heater >> core loop quite >> >>>>> >>> cool to the touch. >> >>>>> >>> >> >>>>> >>> What I'm going to do next: >> >>>>> >>> 1. Bypass heater core. Is there an >> 'easy' >> >>>>> way to >> >>>>> >>> get these hoses off? I cut them when I >> >>>>> replaced them >> >>>>> >>> last summer. Are they 'welded' on by now? >> >>>>> >>> 2. Maybe, flush core, if above works. >> >>>>> >>> >> >>>>> >>> Anything else? >> >>>>> >>> >> >>>>> >>> _______________________________________________ >> >>>>> >>> Miatapower mailing list >> >>>>> >>> [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> >>> <mailto:[email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>>> >> >>>>> >>> >> >>>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>>> >>> >> >>>>> >>> >> >>>>> >>> _______________________________________________ >> >>>>> >>> Miatapower mailing list >> >>>>> >>> [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>><mailto:[email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>>> >> >>>>> >>> >> >>>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>>> > Well, I didn't quite do things in order. I >> flushed the >> >>>>> > heater core. (Pulled heater hoses, attached >> garden hose >> >>>>> > with anti-backflow to one side, attached 6 >> foot hose to >> >>>>> > bucket on the other side.) Nasty, but >> eventually >> >>>>> ran sort >> >>>>> > of clear. So it is NOT the heater core. >> Loads of >> >>>>> water ran >> >>>>> > through it - it does not appear to be a >> restriction. No >> >>>>> > water in the cabin, either - thank goodness. >> >>>>> > >> >>>>> > Then I back flushed the head. In the water >> neck in >> >>>>> the back >> >>>>> > of the head - out the other pipe to the >> heater core. >> >>>>> > >> >>>>> > Hooked everything up again. Filled through >> burping >> >>>>> funnel. >> >>>>> > No apparent flow through the core. However, the >> >>>>> thermostat >> >>>>> > is NOT installed. >> >>>>> > >> >>>>> > Is the thermostat required for the heater >> core to >> >>>>> get water >> >>>>> > flow? >> >>>>> > >> >>>>> > I have a standard new Stant thermostat. Do >> I need >> >>>>> to drill >> >>>>> > out the 'jiggler'? Hole size? Hole is up, >> correct? >> >>>>> > >> >>>>> > Is there a good test for a water pump? >> Looks like I'm >> >>>>> > running out of ideas. Carried off 50 gallons of >> >>>>> 'water'. >> >>>>> > What a fruitless day. >> >>>>> > >> >>>>> > Got insight? >> >>>>> > >> >>>>> > Thanks >> >>>>> > _______________________________________________ >> >>>>> > Miatapower mailing list >> >>>>> > [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> > >> >>>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>>> > >> >>>>> > >> >>>>> >> >>>>> _______________________________________________ >> >>>>> Miatapower mailing list >> >>>>> [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>>> >> >>>>> _______________________________________________ >> >>>>> Miatapower mailing list >> >>>>> [email protected] >> <mailto:[email protected]> >> >>>>> <mailto:[email protected] >> <mailto:[email protected]>> >> >>>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>>> >> >>>>> >> >>>>> >> >>>>> >> >>>>> -- >> >>>>> "It is rightly acknowledged that people of faith >> have no >> >>>>> monopoly of virtue..." >> >>>>> -Queen Elizabeth II >> >>>>> >> >>>>> >> >>>>> _______________________________________________ >> >>>>> Miatapower mailing list >> >>>>> [email protected] >> <mailto:[email protected]> >> >>>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>> _______________________________________________ >> >>>> Miatapower mailing list >> >>>> [email protected] >> <mailto:[email protected]> >> >>>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >>>> >> >>>> >> >>>> >> >>> _______________________________________________ >> >>> Miatapower mailing list >> >>> [email protected] >> <mailto:[email protected]> >> >>> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >> >> > >> > _______________________________________________ >> > Miatapower mailing list >> > [email protected] >> <mailto:[email protected]> >> > >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> > >> >> _______________________________________________ >> Miatapower mailing list >> [email protected] >> <mailto:[email protected]> >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >> > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
