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Old 10-13-2008, 09:57 AM
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Default Running cold

My engine has been having a hard time getting up to operating temperature since before Cruise Moab and I can't figure it out. I just put a new t-stat, o-ring and gasket in and it's a little better but not much

Before I search endless threads on MUD for other solutions, does anybody have any thoughts? I need HEAT for the Spooky Night Run!
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Old 10-13-2008, 10:14 AM
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Determine what the operating temperature of your engine is first. If the engine is operating at 170+ then your heater should work. Use a lazer temp gauge or something other than your gauge. I cleaned out my heater core and found a solid inch of dog hair on top. The lines can be flushed with a garden hose.
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Old 10-13-2008, 10:18 AM
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http://forum.ih8mud.com/40-55-series...ater-core.html
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He who goes unarmed in paradise had better be sure that that is where he is.James Thurber
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pride is ego, the word I had lost was dignity. The quality or state of being worthy of esteem or respect.
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Old 10-13-2008, 11:01 AM
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Quote:
Originally Posted by treerootCO View Post
Determine what the operating temperature of your engine is first. If the engine is operating at 170+ then your heater should work. Use a lazer temp gauge or something other than your gauge. I cleaned out my heater core and found a solid inch of dog hair on top. The lines can be flushed with a garden hose.
Sure, blame it on dogs you cat person!!
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Old 10-13-2008, 11:15 AM
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Yeah, and you have to change your sig line cause the Ptarmigan don't look like that no mo'!

I can check my heater core for hair, but I've had it apart the last two summers/falls/winters so it should be pretty clean unless something got into it over the past couple of months. I've done the muriatic acid treatment several times on the tubes, so they should be clean as well.

I'm not understanding how my engine is overcooling since I have the t-stat in correctly with the o-ring etc. I should probably take the t-stat out and check to make sure it opens and closes. Oy

If I can't figure it out I'm just going to put cardboard in front of the radiator just for the Spooky Night Run so we have some heat!
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1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD

Last edited by subzali; 10-13-2008 at 11:43 AM.
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Old 10-13-2008, 11:51 AM
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Maybe I need to lean out the fuel a little bit? It might be running a little on the rich side...
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TLCA# 13684
Rising Sun Bio
1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD
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Old 10-13-2008, 01:03 PM
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Or maybe my cooling system needs to be burped?
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TLCA# 13684
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1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD
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Old 10-13-2008, 11:56 PM
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i dunno, but maybe the t-stat is sticking open?? even though it's new....

does the rad hose stay cool till the truck warms up, or does it slowly warm up with the truck?
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Old 10-13-2008, 11:59 PM
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Quote:
Originally Posted by treerootCO View Post
Determine what the operating temperature of your engine is first. If the engine is operating at 170+ then your heater should work. Use a lazer temp gauge or something other than your gauge. I cleaned out my heater core and found a solid inch of dog hair on top. The lines can be flushed with a garden hose.
Don't forget pine needles and cat hair!

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Old 10-14-2008, 09:22 AM
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I'll pull the inlet duct to the heater core and check for obstructions and I'm going to replace the thermostat tonight (I happen to have a new spare a just bought as well that I just remembered). Has anyone ever had to double o-ring the top of the thermostat?
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TLCA# 13684
Rising Sun Bio
1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD
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