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1995-2002 Range Rover P38A
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Discussion Starter #1
MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

What should normal operating temperatures be for a 2000 4.6L during summer months about 80-90 degrees Fahrenheit? I could not find any good info in RAVE on this.8~

At highway speed 60-70mph?
Idling in drive at a signal with AC running?
Towing 3500?

Or, spots on the motor ti hit with a infrared gun and their ideal temps?
 

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1970-1995 Range Rover Classic
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478 Posts
Re: MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

Should be about 90°C.
 

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Re: MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

At best (minimum) 96 deg. C (205 F) this is the temp the thermostat is fully open (RAVE, Des Hammill), though any trip monitoring obdII info will say the same (i've found anyway).
 

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1995-2002 Range Rover P38A
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115 Posts
Discussion Starter #4
Re: MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

Thanks guys.. The 4.6 is running at 90c 194f on the highway at about 70mph and 94c 200f sitting at a light. I cleaned and straightened the fins on the rad coolers and have some work to do on the condenser coils. I had to pull the bumper to do a real good job. So, far she seems to be responding well. I have a new thermostat on the way and will install that later this week. Any suggestions on oil weight for a clean burning 125k mile motor?
 

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Re: MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

If you look at the data over over time you'll see a trend, you'll see it dip above and below 96C as the thermostat opens and closes, coupled with the rpm, mph and load on the engine, i bet that 94C will start to creep up if you sit there for a bit.

High ambient temps are not that big a deal, if your system up to par and just being topical last week in 30C temps (high for UK, 33 - 34C Intake temp) i took the viscous off and went for a drive (being sure i wouldn't be sitting anywhere) and it was fine, stopped still the heat does start to build quick, but the mph i was expecting to have to maintain was way lower, this was on level roads so no excessive load on the engine.
 

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1995-2002 Range Rover P38A
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115 Posts
Discussion Starter #6
Re: MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

Thanks Larry.... After reading about blown head gasket and etc. I'm ultra paranoid about coolant temp. Especially if I'm going to pull and old tub around with this truck..
 

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1995-2002 Range Rover P38A
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115 Posts
Discussion Starter #7
Re: MOTOR HEADS please help - What's Normal Running Temperatures 2000 4.6?

New motorad thermostat and she is running 188f at 70mph on a cool day. Idling at a light 190-194f.. Time to move on to other issues.... Such as secondary air and ABS accumulator bulb..
 
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