Cadillac Owners Forum banner

1 - 9 of 9 Posts

·
Registered
01 deville
Joined
·
330 Posts
Discussion Starter #1
i have owned many N* but never a 4.9L what is the normal Coolant Temp on a 92 ELDO? I know N* are 192-224 but dont know about 4.9L thanks.
 

·
Registered
2003 STS w/BoseNav, 1993 Deville, 1985 Deville
Joined
·
1,089 Posts
According to the 1993 Deville (4.9L) FSM, the thermostat opens between 192*F and 199*F (89*C - 93*C). The thermostat fully opens at 219*F (104*C).

The fans are commanded to go to low speed when the coolant reaches 98*C (208*F). High speed is commanded when the coolant reaches 106*C (226*F) or when the A/C refrigerant temp reaches 100*C (212*F).

The "Coolant Temp" light comes on when the temp reaches 125*C (257*F).

So, in summary, you should see temps similar to a Northstar.
 

·
Registered
1993 Eldorado, 4.9L, 200k miles
Joined
·
273 Posts
My '93 Eldorado w/ 4.9L typically stabilizes around 199-201F, per the digital/electronic readout on the dash. The thermostat has been replaced w/ the OEM temp rated replacement.
 

·
Registered
Cadillac
Joined
·
6 Posts
Hello,

I have been looking around the net for the answer to this exact question. We just purchased a 1992 STS, and I wanted to make sure at what temp we should get concerned. The person who sold it to us was a service advisor at a local repair shop, and he told my wife if it reached 220 degrees pull over and let it cool down.

While I respect his knowledge, it seemed to me that 220 wouldn't warrant having to pull over. It has reached this temp a few times, with no smells, noises, that one might expect from overheating.

I would truly appreciate if someone might be able to tell me what I might want to look for as far as temps under normal conditions in SoCal.

Thanks in advance!

Allan
 

·
Registered
2005 White Diamond STS N* 1SF RWD ACC/HUD
Joined
·
2,052 Posts
My 91 STS seems to be perfectly happy and stable around 209*-214* according to the driver information center.
 

·
Registered
2003 STS w/BoseNav, 1993 Deville, 1985 Deville
Joined
·
1,089 Posts
My Deville hit 226*F (106*C) all the time. It did that for 300,000 miles.
 

·
Registered
76 Eldo (54k), 76 Eldo (52k), 78 Eldo (9k), 85 Deville (43k)
Joined
·
668 Posts
220 is not a problem for these cars. Most new cars run hotter than that in stop and go traffic. The low speed fans on the 92 Seville won't even kick on until about 225 degrees F.

My 92 STS runs at about 198 on the freeway, or when I'm driving it at a speed that's actually cooling off the radiator. In very bad stop an go traffic it'll hit 225 all the time, then go down to about 215 where the fan kicks off, but it never gets above 235 (I think the high speed kicks on at about 230 or so).

I'd say if you hit 240-245 you should pull over and shut it off. That's too hot.
 
1 - 9 of 9 Posts
Top