Could one of the radiator hoses be collapsed internally? Sam
On Mon, Apr 11, 2011 at 8:24 PM, Ross Kuhns <[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]> > 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]] 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]>> 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]>] On Behalf > >>>>> Of Bruce Labitt > >>>>> Sent: Sunday, April 10, 2011 7:59 PM > >>>>> To: [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]>] On Behalf > >>>>> Of Bruce Labitt > >>>>> > Sent: Sunday, April 10, 2011 7:22 PM > >>>>> > To: [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.cincimiata.com<http://www.cincimiata.com/> > >>>>> >>> > >>>>> 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]>>> 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]>> > >>>>> >>> > >>>>> 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 > >>>>> > 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]> > >>>>> > > >>>>> 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 > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> -- > >>>>> "It is rightly acknowledged that people of faith have no > >>>>> monopoly of virtue..." > >>>>> -Queen Elizabeth II > >>>>> > >>>>> > >>>>> _______________________________________________ > >>>>> 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 > >>>> > >>>> > >>>> > >>> _______________________________________________ > >>> 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 > > > > _______________________________________________ > 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
