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#1
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C4 cooling
I need some help. 1990 c4, temp is good when driving but when idling
the temp begins to rise and almost overheats. No leaks, replaced all seals and gaskets, changed thermostat. Water pump appears to be working but not well, no leaks from weep holes. Is the pump starting to fail but no symptoms? What do you think? I plan to change the pump out this week end, I am wondering if I am overlooking something. Thanks Joe |
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#2
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Did you bleed the air out of the system?
-- Charlie !993 Corvette Convertible > wrote in message ... I need some help. 1990 c4, temp is good when driving but when idling the temp begins to rise and almost overheats. No leaks, replaced all seals and gaskets, changed thermostat. Water pump appears to be working but not well, no leaks from weep holes. Is the pump starting to fail but no symptoms? What do you think? I plan to change the pump out this week end, I am wondering if I am overlooking something. Thanks Joe --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.737 / Virus Database: 491 - Release Date: 8/13/2004 |
#3
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Before you spend any more time and money, what makes you think it is
overheating? A C4 can easily go to 230 when sitting at idle on a hot day. This is normal. Dale Still Corvetteless after 3 months. ARGH!!! On or about Wed, 18 Aug 2004 02:50:58 GMT, wrote or did cause to be written: >I need some help. 1990 c4, temp is good when driving but when idling >the temp begins to rise and almost overheats. No leaks, replaced all >seals and gaskets, changed thermostat. Water pump appears to be >working but not well, no leaks from weep holes. Is the pump starting >to fail but no symptoms? What do you think? I plan to change the pump >out this week end, I am wondering if I am overlooking something. > >Thanks > Joe |
#4
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Dale,
Thanks for your reply. I wasn't aware 230 was normal. I thought that was hot. Why the huge fluctuation in temp when idling? Thanks Joe On Wed, 18 Aug 2004 12:27:40 GMT, Dale > wrote: >Before you spend any more time and money, what makes you think it is >overheating? A C4 can easily go to 230 when sitting at idle on a hot >day. This is normal. > >Dale >Still Corvetteless after 3 months. ARGH!!! > >On or about Wed, 18 Aug 2004 02:50:58 GMT, wrote or >did cause to be written: > >>I need some help. 1990 c4, temp is good when driving but when idling >>the temp begins to rise and almost overheats. No leaks, replaced all >>seals and gaskets, changed thermostat. Water pump appears to be >>working but not well, no leaks from weep holes. Is the pump starting >>to fail but no symptoms? What do you think? I plan to change the pump >>out this week end, I am wondering if I am overlooking something. >> >>Thanks >> Joe |
#5
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How do you do that?
'94 Cpe "Charlie" > wrote in message ... Did you bleed the air out of the system? -- Charlie !993 Corvette Convertible > wrote in message ... I need some help. 1990 c4, temp is good when driving but when idling the temp begins to rise and almost overheats. No leaks, replaced all seals and gaskets, changed thermostat. Water pump appears to be working but not well, no leaks from weep holes. Is the pump starting to fail but no symptoms? What do you think? I plan to change the pump out this week end, I am wondering if I am overlooking something. Thanks Joe --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.737 / Virus Database: 491 - Release Date: 8/13/2004 |
#7
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Of course you know to check the area in front to the radiator. C4s are like
vacuums and you'd be surprise what you will find - leaves, plastic, misc trash. > wrote in message news > Dale, > > Thanks for your reply. I wasn't aware 230 was normal. I thought that > was hot. Why the huge fluctuation in temp when idling? > > Thanks > > Joe > > > On Wed, 18 Aug 2004 12:27:40 GMT, Dale > wrote: > > >Before you spend any more time and money, what makes you think it is > >overheating? A C4 can easily go to 230 when sitting at idle on a hot > >day. This is normal. > > > >Dale > >Still Corvetteless after 3 months. ARGH!!! > > > >On or about Wed, 18 Aug 2004 02:50:58 GMT, wrote or > >did cause to be written: > > > >>I need some help. 1990 c4, temp is good when driving but when idling > >>the temp begins to rise and almost overheats. No leaks, replaced all > >>seals and gaskets, changed thermostat. Water pump appears to be > >>working but not well, no leaks from weep holes. Is the pump starting > >>to fail but no symptoms? What do you think? I plan to change the pump > >>out this week end, I am wondering if I am overlooking something. > >> > >>Thanks > >> Joe > |
#8
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> wrote in message news > Dale, > > Thanks for your reply. I wasn't aware 230 was normal. I thought that > was hot. Why the huge fluctuation in temp when idling? > > Thanks > > Joe Joe, At highway speeds the ram air flows much more air thru the radiator than the fan could ever hope to, it also lowers the ambient temp of the engine compartment. In reality most vehicles wouldn't need a fan if they only ran on the highway. Excepting of course the mountain grades with the A/C on ;-P Marty |
#9
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I cannot stand the car running at such high temperatures. But, 242 is
the top of the chart so you are well within the overheat condition. The factory radiator is too small and has plastic tanks. I installed a new all aluminum one with twice the capacity. The car runs at 193 consistantly. I ahve replaced the waterpump three times in twelve years so they are bound to fail. Also, you really need to check the radiator cap to make sure that it is holding pressure. If it is not you will run hot too. Go to the dealer as the aftermarket caps are not worth the money. wrote: > I need some help. 1990 c4, temp is good when driving but when idling > the temp begins to rise and almost overheats. No leaks, replaced all > seals and gaskets, changed thermostat. Water pump appears to be > working but not well, no leaks from weep holes. Is the pump starting > to fail but no symptoms? What do you think? I plan to change the pump > out this week end, I am wondering if I am overlooking something. > > Thanks > Joe > |
#10
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Better yet, turn on the heater. :P (it works)
Yahoo! > wrote: > When you come to an idle for a long time, turn on the A/C to lower the > engine temp. That starts the A/C fan which also cools the coolant in > the C4. > > Bob |
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