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Old 02-26-2010, 06:33 PM   #1
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Default 4.9L/300ci Thermostat question.

If this has been discussed here already I apologize. I did a few searches and came up with nothing...

I need to know what temperature I need to get for the thermostat. Everywhere I have looked they have a list between 160 degrees up to 205 degrees. What is the factory, or best one to go with for the truck?

Just doing some routine maint on the old gal. This is on a 1992 F-150 2wd 4.9/300 with a little over 298,000 miles.
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Old 02-26-2010, 06:47 PM   #2
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If this has been discussed here already I apologize. I did a few searches and came up with nothing...

I need to know what temperature I need to get for the thermostat. Everywhere I have looked they have a list between 160 degrees up to 205 degrees. What is the factory, or best one to go with for the truck?

Just doing some routine maint on the old gal. This is on a 1992 F-150 2wd 4.9/300 with a little over 298,000 miles.
"Peacekeeper" is a very ironic name for someone authoring this particular question! I think I'll just watch for now. It that really code for "*hit disturber"?<-Joke-< (kinda) It depends on who's hanging out in the belfry's, as to how heated it will get.
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Old 02-26-2010, 06:59 PM   #3
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run what you need...the warmer teh climate the cooler I go...the colder teh climate the warmer it should be...

personally I run a 160 stat in ALL my vehicles and have even the newest 2007 van I had

I run a 160 in my 300-6 currently even in winter and heat isnt an issue even in Indiana winters...

people will tell you it wont go into loop mode less than 185 degrees but thats BS...it will still go in loop mode at 140 degrees...

mine does just fine and I havent tweaked the ECM in one bit....
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Not a spankable offense...unless "raider" does it.

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Old 02-26-2010, 06:59 PM   #4
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ymeski, I take it that this is a subject of some controversy? I'm just looking for the factory specs on the thermostat. I could really care less about anyone's opinion on what should be used.

peacekeeper is just a handle I've had online for some years. Not code for anything, but I am a Marine so I don't mind a bit of action every now and then.
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Old 02-26-2010, 07:01 PM   #5
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Originally Posted by dr_bowtie View Post
run what you need...the warmer teh climate the cooler I go...the colder teh climate the warmer it should be...

personally I run a 160 stat in ALL my vehicles and have even the newest 2007 van I had

I run a 1600 in my 300-6 currently even in winter and heat isnt an issue even in Indiana winters...

people will tell you it wont go into loop mode less than 185 degrees but thats BS...it will still go in loop mode at 140 degrees...

mine does just fine and I havent tweaked the ECM in one bit....
Cool deal, thanks for the input.
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Old 02-26-2010, 07:01 PM   #6
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factory is 195 degrees
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Old 02-26-2010, 07:17 PM   #7
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Quote:
Originally Posted by peacekeeper View Post
ymeski, I take it that this is a subject of some controversy? I'm just looking for the factory specs on the thermostat. I could really care less about anyone's opinion on what should be used.

peacekeeper is just a handle I've had online for some years. Not code for anything, but I am a Marine so I don't mind a bit of action every now and then.
Well, Semper Fi to you sir! Sometimes, you have to stir up a little, to keep the peace! 192F is also factory spec. (for thermostat). It must be a very big factory. Haynes says 195F. Alldata say's 192F (good luck finding a 192F thermostat) I live in a 50F-85F climate & run a moderate timing of 16BTDC. so I go w/ a 180F, which works better than a warmer one for me. I get 17/23 mpg so I know I'm in closed loop.
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Old 02-26-2010, 09:22 PM   #8
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I appreciate the quick response folks. I have to say that this seems to be the first vehicle forum I have been on where anyone seems to know anything about their vehicle. Everywhere I go people seem more worried about the way their hooptie looks than how it functions.

Once I get all of this regular maint. done on her, I need to start checking out the heater. I don't think it has ever really worked that great since 92, but it has been surprisingly cold this winter for Texas.
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Old 02-26-2010, 09:53 PM   #9
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I appreciate the quick response folks. I have to say that this seems to be the first vehicle forum I have been on where anyone seems to know anything about their vehicle. Everywhere I go people seem more worried about the way their hooptie looks than how it functions.

Once I get all of this regular maint. done on her, I need to start checking out the heater. I don't think it has ever really worked that great since 92, but it has been surprisingly cold this winter for Texas.
While there are some that let their "Hooptie" get the best of em, most seem to know where performance begins to dwindle & Hooptie takes over. On your heater core, the flow isn't as forceful as you might think during normal operation. Sediment tends to accumulate. Disconnect the hoses in & out, farthest from the coil & force city water pressure (garden hose) through them, alternating flow directions. Any sediment should be dislodged. Works for me. Here's an inexpensive performance mod requiring minimal $ ($150.+-), time or elbow grease. Your best bang for your buck! http://fullsizebronco.com/forum/show...ht=timing+bump
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Old 02-27-2010, 02:44 PM   #10
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Cool deal. Thanks for the info. I've been planning to do just that with the ignition system, just didn't really know if it would be worth it on this engine.

But Christ almighty is there some magical way to burp the damn system? I've been having it out with the air in the system, and I be damned if I'm not getting my butt kicked. I know there is some witch doctor crap you can do to Jeeps to get them good to go. Is there some secret with the 4.9?
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Old 02-27-2010, 02:44 PM
 
 
 
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