ON Topic: 88 Supra overheating...
in [Toyota]
|
Prev: Groups want FCC to police hate speech
Next: Where's the monthly number of who posted the mostest?
From: Hachiroku ハチロク on 3 Jun 2010 22:00 On Fri, 04 Jun 2010 01:23:24 +0000, Tegger wrote: > =?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?= <Trueno(a)e86.GTS> wrote > in news:dZFNn.21379$7d5.12341(a)newsfe17.iad: > >> On Wed, 02 Jun 2010 23:04:28 -0500, Ray O wrote: >> >> > >>>> >>> Replace the cap while you're at it. >> >> I think it comes with one. >> >> I was thinking about that, but the cap is openeing up and letting the >> coolant flow into the bottle. > > > > Yeah, but is it opening at a too-low pressure? If it is, the coolant will > boil and spew all over the place. Bad juju, bwana... > > > >> The coolant I saw in the shroud was the stuff that was being purged out >> of the bottle... > > > Either a bad rad-cap, or you've got a blown head gasket. How's the stuff > in the bottle smell? Rubbery? Or like paint-thinner? > > > > >> I think I might actually get a real Toyota cap, if it fits. They're only >> $11... >> >> > > You use /aftermarket/ rad caps? Eww, gross. OEM-only, for me. AARRGGHH... How do I know if I've blown a gasket? The most usual means of detecting a BHG is by noticing your temperature gauge skyrocketing. A BHG does not directly cause the engine to run hotter - the break in the gasket allows combustion gasses to leak into the cooling system, forcing radiator water out into the overflow bottle.
From: jim beam on 3 Jun 2010 23:28 On 06/03/2010 07:00 PM, Hachiroku $B%O%A%m%/(B wrote: > On Fri, 04 Jun 2010 01:23:24 +0000, Tegger wrote: > >> =?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?=<Trueno(a)e86.GTS> wrote >> in news:dZFNn.21379$7d5.12341(a)newsfe17.iad: >> >>> On Wed, 02 Jun 2010 23:04:28 -0500, Ray O wrote: >>> >>> >> >>>>> >>>> Replace the cap while you're at it. >>> >>> I think it comes with one. >>> >>> I was thinking about that, but the cap is openeing up and letting the >>> coolant flow into the bottle. >> >> >> >> Yeah, but is it opening at a too-low pressure? If it is, the coolant will >> boil and spew all over the place. Bad juju, bwana... >> >> >> >>> The coolant I saw in the shroud was the stuff that was being purged out >>> of the bottle... >> >> >> Either a bad rad-cap, or you've got a blown head gasket. How's the stuff >> in the bottle smell? Rubbery? Or like paint-thinner? >> >> >> >> >>> I think I might actually get a real Toyota cap, if it fits. They're only >>> $11... >>> >>> >> >> You use /aftermarket/ rad caps? Eww, gross. OEM-only, for me. > > AARRGGHH... > > How do I know if I've blown a gasket? > > The most usual means of detecting a BHG is by noticing your temperature > gauge skyrocketing. A BHG does not directly cause the engine to run hotter > - the break in the gasket allows combustion gasses to leak into the > cooling system, forcing radiator water out into the overflow bottle. > > and when it does that, the bubbles in the system mean less liquid volume in the cooling passages, thus you get overheating... get one of those chemical leak test kits. the pH of the coolant changes if the gasket is leaking - provided you haven't masked it by changing the coolant too recently. -- nomina rutrum rutrum
From: Hachiroku ハチロク on 3 Jun 2010 23:47 On Thu, 03 Jun 2010 20:28:54 -0700, jim beam wrote: > On 06/03/2010 07:00 PM, Hachiroku $B%O%A%m%/(B wrote: >> On Fri, 04 Jun 2010 01:23:24 +0000, Tegger wrote: >> >>> =?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?=<Trueno(a)e86.GTS> >>> wrote in news:dZFNn.21379$7d5.12341(a)newsfe17.iad: >>> >>>> On Wed, 02 Jun 2010 23:04:28 -0500, Ray O wrote: >>>> >>>> >>>> >>> >>>>> Replace the cap while you're at it. >>>> >>>> I think it comes with one. >>>> >>>> I was thinking about that, but the cap is openeing up and letting the >>>> coolant flow into the bottle. >>> >>> >>> >>> Yeah, but is it opening at a too-low pressure? If it is, the coolant >>> will boil and spew all over the place. Bad juju, bwana... >>> >>> >>> >>>> The coolant I saw in the shroud was the stuff that was being purged >>>> out of the bottle... >>> >>> >>> Either a bad rad-cap, or you've got a blown head gasket. How's the >>> stuff in the bottle smell? Rubbery? Or like paint-thinner? >>> >>> >>> >>> >>>> I think I might actually get a real Toyota cap, if it fits. They're >>>> only $11... >>>> >>>> >>>> >>> You use /aftermarket/ rad caps? Eww, gross. OEM-only, for me. >> >> AARRGGHH... >> >> How do I know if I've blown a gasket? >> >> The most usual means of detecting a BHG is by noticing your temperature >> gauge skyrocketing. A BHG does not directly cause the engine to run >> hotter - the break in the gasket allows combustion gasses to leak into >> the cooling system, forcing radiator water out into the overflow bottle. >> >> >> > and when it does that, the bubbles in the system mean less liquid volume > in the cooling passages, thus you get overheating... > > get one of those chemical leak test kits. the pH of the coolant changes > if the gasket is leaking - provided you haven't masked it by changing the > coolant too recently. I haven't changed it, but I added some the day before. We found the BHG in my Soob by removing the rad cap and sticking the hydrocarbon probe at the Emission Inspection station in the radiator. I don't know if they have them any more since it's all OBD-II now...
From: Ray O on 3 Jun 2010 23:52 "Hachiroku ????" <Trueno(a)e86.GTS> wrote in message news:dZFNn.21379$7d5.12341(a)newsfe17.iad... > On Wed, 02 Jun 2010 23:04:28 -0500, Ray O wrote: > >> >> "Hachiroku ????" <Trueno(a)e86.GTS> wrote in message >> news:JAFNn.35974$h57.25681(a)newsfe22.iad... >>>I know there are techs in all three groups, hence the cross posting.... >>> >>> The other day, the day it got clobbered by the storm, it was 96 degrees >>> in Keene NH. That's ~35 miles from home. Since it was nice I decided to >>> take the roof off the Supra and use it for my daily rounds. >>> >>> Everything was fine until about mile 27, and then I noticed the temp >>> climbing. By the time I got to my first stop it was almost to the red. >>> >>> It behaved the rest of the time in Keene, and then, about 27 miles later >>> it was heating up again. >>> >>> I opened the radiator and it was down about a quart, but the bottle was >>> on "low". I filled the radiator and let it sit for a couple rainy days. >>> >>> Today was bright and sunny and about 86 degrees, so, since the roof >>> doesn't *quite* fit as well after making like a kite it sits in the >>> trunk, and again the ~35 mile trip to Keene. 27 miles up the >>> road...almost in the red again. When I got to where I pick up my parts I >>> let it cool and then opened the hood, and in front of the radiator the >>> shroud attached to the bottom of the car was wet, and the overflow >>> bottle was FULL. Spring a leak? I patched one split in the plastic top >>> a couple years ago, and it had sprung again. When I filled it I did not >>> add any to the bottle. >>> >>> It ran OK for the few stops I had, then back home...27 miles... >>> >>> When I got home I left the heat on and would start it, ramp the non >>> eletric fan up and shut it down. After about 1/2 an hour letting it sit, >>> I went out and gingerly removed the radiator cap. The cap was COOL! >>> Again... down about a quart in the readiator, but this time the bottle >>> was full. >>> >>> I am guessing the radiator is plugged up. It is the original 22 year old >>> radiator, so I ordered a new one. From Toyota? HAH! Even though they >>> last +20 years, they are also FOUR HUNDRED AND EIGHTY SEVEN DOLLARS!!! >>> >>> SPI, $130. It may only last seven years, but then, how much longer will >>> the car last? (Although it is in pretty good shape...) >>> >>> BTW, I had the SAME THING happen to my '89 Subaru GL coupe, and after >>> replacing the radiator I don't even need the fan, the thing runs so >>> cool. >>> >>> >> Replace the cap while you're at it. > > I think it comes with one. > > I was thinking about that, but the cap is openeing up and letting the > coolant flow into the bottle. > > The coolant I saw in the shroud was the stuff that was being purged out of > the bottle... > > I think I might actually get a real Toyota cap, if it fits. They're only > $11... > A bad cap will open too soon so the cooling system doesn't maintain pressure, and if the cooling system doesn't maintain pressure, the boiling temp goes down, more coolant gets pushed out, air gets in, and temps rise. A blown head gasket can allow combustion gases into the coolant, which pushes coolant out, and temps rise. Look for oil in the coolant, either in the radiator or a milkshake appearance in the oil. Either symptom can indicate a BHG. If the coolant and oil are pristine, then you have a leak somewhere in the cooling system - radiator, hoses, cap, or heater core. While you're poking around make sure coolant isn't weeping or leaking from the timing cover, a sign of a leaking water pump. -- Ray O (correct punctuation to reply)
From: Ray O on 4 Jun 2010 00:13
"Hachiroku ????" <Trueno(a)e86.GTS> wrote in message news:PH_Nn.132057$0M5.83993(a)newsfe07.iad... > On Thu, 03 Jun 2010 20:28:54 -0700, jim beam wrote: > >> On 06/03/2010 07:00 PM, Hachiroku $B%O%A%m%/(B wrote: >>> On Fri, 04 Jun 2010 01:23:24 +0000, Tegger wrote: >>> >>>> =?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?=<Trueno(a)e86.GTS> >>>> wrote in news:dZFNn.21379$7d5.12341(a)newsfe17.iad: >>>> >>>>> On Wed, 02 Jun 2010 23:04:28 -0500, Ray O wrote: >>>>> >>>>> >>>>> >>>> >>>>>> Replace the cap while you're at it. >>>>> >>>>> I think it comes with one. >>>>> >>>>> I was thinking about that, but the cap is openeing up and letting the >>>>> coolant flow into the bottle. >>>> >>>> >>>> >>>> Yeah, but is it opening at a too-low pressure? If it is, the coolant >>>> will boil and spew all over the place. Bad juju, bwana... >>>> >>>> >>>> >>>>> The coolant I saw in the shroud was the stuff that was being purged >>>>> out of the bottle... >>>> >>>> >>>> Either a bad rad-cap, or you've got a blown head gasket. How's the >>>> stuff in the bottle smell? Rubbery? Or like paint-thinner? >>>> >>>> >>>> >>>> >>>>> I think I might actually get a real Toyota cap, if it fits. They're >>>>> only $11... >>>>> >>>>> >>>>> >>>> You use /aftermarket/ rad caps? Eww, gross. OEM-only, for me. >>> >>> AARRGGHH... >>> >>> How do I know if I've blown a gasket? >>> >>> The most usual means of detecting a BHG is by noticing your temperature >>> gauge skyrocketing. A BHG does not directly cause the engine to run >>> hotter - the break in the gasket allows combustion gasses to leak into >>> the cooling system, forcing radiator water out into the overflow bottle. >>> >>> >>> >> and when it does that, the bubbles in the system mean less liquid volume >> in the cooling passages, thus you get overheating... >> >> get one of those chemical leak test kits. the pH of the coolant changes >> if the gasket is leaking - provided you haven't masked it by changing the >> coolant too recently. > > > I haven't changed it, but I added some the day before. > > We found the BHG in my Soob by removing the rad cap and sticking the > hydrocarbon probe at the Emission Inspection station in the radiator. I > don't know if they have them any more since it's all OBD-II now... > A gas leak detector will work. -- Ray O (correct punctuation to reply) |