2004 Tahoe operating temp issue.

[93M6Formula]

This is with that line basically clamped shut. This was showing about 203-207 on my scanner.

 

[Charlie207]

@Charlie207 posted a few pics in this thread. The restrictor is a small orifice built into the radiator fitting for the small return hose going to the surge tank.

Cold Case radiator

Somewhere in these threads a 45 cal Brass without primer installed was cited as a "perfect"fit restrictor. Is there a quick DIU for this? My aftermarket radiator ( Champion) also cools too well on cool mornings, and causes the same dash error. I have a zillion .45 brass laying around, and...

www.tahoeyukonforum.com

If anyone wants spent .45ACP brass for this mod, let me know. I'm happy to throw one or two in an envelope and mail them to you.

OD post-fireforming looks to be 0.478" which fit snuggly, but easily, in my GMT900 overflow hose.

I'll let you drill it out to your preference.

 

[93M6Formula]

I think I will probably just get a new thermostat again and test it this time before install. Kind of want to get a new GM pump too just to be sure nothing is wrong with it. All I know is it shouldn't take a 5.3 gasser longer to warm up than my diesels, that's why I bought a gasser again for winter lol.

 

[Doubeleive]

if you are going to do the thermostat then get a new oem radiator as well and be done with it. both are easy to do

 

[rockola1971]

If anyone wants spent .45ACP brass for this mod, let me know. I'm happy to throw one or two in an envelope and mail them to you.

OD post-fireforming looks to be 0.478" which fit snuggly, but easily, in my GMT900 overflow hose.

I'll let you drill it out to your preference.

View attachment 386692

Id rather you throw the magazine in a mailer and send it! I have all the .45 acp brass that I need.

 

[rockola1971]

I think I will probably just get a new thermostat again and test it this time before install. Kind of want to get a new GM pump too just to be sure nothing is wrong with it. All I know is it shouldn't take a 5.3 gasser longer to warm up than my diesels, that's why I bought a gasser again for winter lol.

Not alot to go wrong with a water pump. It can leak past its mechanical seal, impeller could come off its shaft (overheating would happen then) or the impeller could corrode away (overheating would be the symptom for that too).

 

[Charlie207]

Id rather you throw the magazine in a mailer and send it! I have all the .45 acp brass that I need.

Primary Arms had them for like $22 for a while.

 

[93M6Formula]

Not alot to go wrong with a water pump. It can leak past its mechanical seal, impeller could come off its shaft (overheating would happen then) or the impeller could corrode away (overheating would be the symptom for that too).

My worry I guess is that it's some super cheap aftermarket replacement that has some flaws, it's definetely not original. Wondering if it's an issue with the thermostat surface. Just spitballing at this point.

 

[rockola1971]

My worry I guess is that it's some super cheap aftermarket replacement that has some flaws, it's definetely not original. Wondering if it's an issue with the thermostat surface. Just spitballing at this point.

Another quick and dirty check is to squeeze upper radiator hose between your thumb and index finger on a cold enngine and see if you feel a surge of coolant trying to push your fingers apart. This should not be happening on a cold engine. If it is then it means the thermostat is stuck open (Before the engine is even warm).

 

[nonickatall]

How long did it take, at 32° Fahrenheit to get the temperatur in the middle of the gauge, when driving normal?

I would like to know to compare. My Escalate 6Liter needs minimum 3-4 Miles or more. What is normal on this engines?