RVing message boards > Tech Talk
454 getting too hot
seilerbird:
I got a set of gauges installed on my motorhome and I have an engine temperature problem with my 85 Allegro 454. The temperature runs about 210. First thing I replaced was the radiator cap and that didn't help. There is no fluid leaks and the fluid is at the proper level. I believe my engine has a clutch fan and I never hear it run even when it climbs to 220. So I am guessing that I will need to replace the thermostat and the clutch fan. Any one have any other ideas?
PancakeBill:
Before you installed gauges, all was fine. Obviously the gauges.
Or what you said.
seilerbird:
No, all was not fine. I could tell the engine was getting hotter than it should. Occasionally it would run on after I shut off the engine. The dog house was getting a bit warm to the touch.
ceemike:
You may want to verify that your engine has a 195 degree t-stat which I believe is the OE temp stat. According to the Stant website an alternative temp t-stat of 205 degrees is available.
DonTom:
--- Quote from: seilerbird on December 23, 2010, 07:02:24 AM ---I got a set of gauges installed on my motorhome and I have an engine temperature problem with my 85 Allegro 454. The temperature runs about 210. First thing I replaced was the radiator cap and that didn't help. There is no fluid leaks and the fluid is at the proper level. I believe my engine has a clutch fan and I never hear it run even when it climbs to 220. So I am guessing that I will need to replace the thermostat and the clutch fan. Any one have any other ideas?
--- End quote ---
I would not consider a steady 210 as being too hot if it doesn't increase. If it makes you feel better to run at a lower temp, but in a lower temp thermostat. The thermostat is what sets your minimum temperature on a warmed up engine.
-Don- Reno. NV
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