Re: [Chrysler300] temperature gauge actual temperatures

[Michael Moore <mmoore8425@xxxxxxx>]

I didn’t see my  problem identified and I bet it has happened to others. 
My 300H temp gauge  would get alarmingly hot. At the same time, the oil pressure gauge would drop. After a custom radiator, biggest fans bade i could find, new clutch, heavy duty water pump and every other thing that was suggested I discovered the solution. On a summer day, in my garage, with the engine idling, I was charging the A/C. I had to get inside the car to check the temp coming out of the  ducts a few times. I noticed my heat gauge was nearly pegged one way, and the oil pressure was zilch. Back to the engine, and I realized-that engine was N OT showing any signs of being overheated. After all that, it turned out there is an instrument voltage regulator which controls both the oil and temp gauge. Mine was bad. I replaced and my engine never overheated again. 
Mike Moore 300H

  
On May 5, 2014, at 9:06 AM, retromobilia <retromobilia@xxxxxxxxxxx> wrote:

> 
> 'Cooling System 101'
> 
> John, You are mistaken about the thermostat. It is made to get the temperature above 180 degrees or whatever it's rating is (190 or 180) only (it does not perform any cooling function) [In fact if one were to remove the thermostat, the engine could run a very low temperature and harm the engine components.) 
> 
> Once the thermostat opens (when the water in the block reaches 180) it stays open, (unless the temperature dropped lower than 180 (like in sub freezing areas) and it will close to get it back up.) The purpose of the thermostat is to heat up the engine so that you do no damage stressing the cold components on initial driving. 
> 
> The system (cooling system complete with radiator) is designed to keep the engine at close to operating temperature of between 200 and 220 degrees (where the oil can perform its purpose lubricating and boiling off contaminants [venting them out or ingesting with pcv valve].) Oil can do its job up to about 250 degrees. The car with 200 degrees, which the requester asked about, is on the low side of operating temperature.
> 
> Please be careful giving information which may cause a novice more problems in the long run>
> Sincerely,
> John
> 
> PS: there are three major things which can cause a car radiator to 'boil over' in increasing order: Clogged radiator and/or sludge in the cooling system; faulty water pump; Incorrect timing. And then of course, a broken, stuck closed thermostat! 
> PPS: Forgot the radiator cap; it is sealed to hold a specific pressure in the system which is calibrated to keep pressure at the engineering design level to avoid letting the water reaching a boil.
> 
> 
> From: "John Grady" <jkg@xxxxxxxxxxxxxxxxx>
> To: "Tony Bevacqua" <tonysru2@xxxxxxxxxxx>, "Charlie V" <cv300g@xxxxxxxxx>, "rinandal" <rinandvan@xxxxxxx>, chrysler300@xxxxxxxxxxxxxxx
> Sent: Monday, May 5, 2014 7:39:27 AM
> Subject: RE: [Chrysler300] temperature gauge actual temperatures
> 
>  
> These are like gas gauges, very inaccurate and even if gauge is attempted to be calibrated ,unlike computer equipped cars, the analog sender end is not ; That said, these are often messed with, and may be way out , why JC can correct outliers ( any adjustment will be turned (John’s law, aka “golden screwdriver” ) and the gauges have two..do not touch them ,unless you know for sure what you are doing, and have correct test signal) ---only a real reading with infra red remote(probably best) or thermometer will tell you numerically about what the gauge is really telling you, no matter where on dial that is ; getting a conceptual data point just over 200 is good, as water thermostat will open and close to keep engine at its setting, 180 or 190; once it cannot do that (it is open all the time, cannot keep up with heat ) temp will go over 200-205, ---or more, on hot day, A/C on; that is what you need to know . Also a low pressure relief cap and overflow bottle (latter, if added) will become active , in the 220’s, telling you it is stressed ; with 180 or 190 (or 160!) thermostats, and all working, on a cool day , the pointer inside will point to that “in regulation” desired temp, once warmed up all the way.,.. a good quick way to tell when things are about right; a more upscale reading indicates it is over thermostat setting, which is somewhat normal when stressed, but if that happens on a cool day, or unexplained, problems coming .
> 
> I had some problems with correctly fitting relief caps on these cars, as a true relief cap needs to seal to outer/upper radiator lip as well as to inner radiator neck where spring pushes it down. Some of the originals have a sort of springy brass plate for upper /outer seal, as it is only to keep water from getting out at cap edge faster than drain tube open to ground can get rid of it ; with no or poor seal there , overflow bottle water will not get sucked back in by vacuum when cool. New caps with upper seal seem not to fit upper ring of OEM radiators quite right---doubt it was designed for those. Although they clip on OK. 
> 
> You can also see the following action on some cars; as it warms up it usually overshoots the stable point by 5% or so, and then comes back as thermostat opens and slug of cool water goes around ,the first time, then it goes back to stable point . A lot of info for you, in that action…..Or when climbing long hills. 
> 
> You can sort of get used to where it sits, that is your normal, why normal bar is long. If it starts going more, something is behind that, unless very hot day and/or A/C on. 
> 
> My .03…………..
> 
> john
> 
> From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Tony Bevacqua
> Sent: Monday, May 05, 2014 10:05 AM
> To: 'Charlie V'; 'rinandal'; chrysler300@xxxxxxxxxxxxxxx
> Subject: [Chrysler300] temperature gauge actual temperatures
> 
> FYI, I found my G having a VERY high read with no boiling nor overflow, etc., so Jeff Carter suggested that he send me a recently calibrated one to put in, which I did. I sent him mine and kept his because it brought the temps down to normal readings. You might consider this way, especially if you want the correct gauge for your year.
> 
> Tony
> 
> From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Charlie V
> Sent: Monday, May 05, 2014 2:53 AM
> To: rinandal; chrysler300@xxxxxxxxxxxxxxx
> Subject: Re: [Chrysler300] temperature gauge actual temperatures
> 
> Hi Van,
> 
> I would say that in the middle is just right and over there on the side of " H " is too HOT.
> 
> But not necessarily so. On my 62 300 Sport Convertible the gauge is always on the " H " side. I installed another temp gauge and that show the engine running around 185 degrees.
> 
> Charlie Valentine
> 
> From: rinandal <rinandvan@xxxxxxx>
> To: chrysler300@xxxxxxxxxxxxxxx 
> Sent: Friday, May 2, 2014 6:03 PM
> Subject: [Chrysler300] temperature gauge actual temperatures
> 
> Hi all,
> Heat just came on in southern CA. Which brings me to my question . On my 1964 K there are no numbers on the temperature gauge. So if all is stock and in good working order for the sake of this question: What temperature does the little "overheat" section on the right hand(hot) side of the gauge represent? 
> 
> Thanks,
> Van
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 



------------------------------------

To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx

To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or
go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button

For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm

For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/Chrysler300/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/Chrysler300/join
    (Yahoo! ID required)

<*> To change settings via email:
    Chrysler300-digest@xxxxxxxxxxxxxxx 
    Chrysler300-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo Groups is subject to:
    https://info.yahoo.com/legal/us/yahoo/utos/terms/