Hey guys! What's wrong with my truck?

"Bandit" (2bandit) 01/08/2015 at 17:36 • Filed to: Blue turd

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So the engine will get up to temperature and run normally, but the gauge won't move above the point shown and I don't have any heat. The truck also over heated twice this week because I didn't have enough antifreeze in the system. Help? 2000 2WD Chevy Blazer with the 4300

HammerheadFistpunch > Bandit 01/08/2015 at 17:38

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stuck thermostat?

Arch Duke Maxyenko, Shit Talk Extraordinaire > Bandit 01/08/2015 at 17:38

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Thermostat is stuck open. Because it failed.

Twism > Bandit 01/08/2015 at 17:39

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Thermostat.

broken or simply popped out.

Zipppy, Mazdurp builder, Probeski owner and former ricerboy > Bandit 01/08/2015 at 17:42

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Low antifreeze can also cause low temps iirc, did you already refill?

And as others mentioned, check the thermostat.

Bandit > Arch Duke Maxyenko, Shit Talk Extraordinaire 01/08/2015 at 17:43

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You're likely correct. Any idea if a GM 3800 thermostat would fit a 4300?

Bandit > Zipppy, Mazdurp builder, Probeski owner and former ricerboy 01/08/2015 at 17:43

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I have indeed.

BJ > Bandit 01/08/2015 at 17:44

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The duke is correct - thermostat.

If only EssExTee could be so grossly incandescent > Bandit 01/08/2015 at 17:46

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So it's not getting hot enough yet it's overheating? ...whaaaaa?

Bandit > If only EssExTee could be so grossly incandescent 01/08/2015 at 17:52

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It did overheat because the engine was frozen due to lack of antifreeze. I've fixed that. Now the engine get's hot but the gauge and my heater dont.

If only EssExTee could be so grossly incandescent > Bandit 01/08/2015 at 17:54

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Perhaps the low antifreeze is related to the thermostat breaking. Were you able to find any leaks?

ly2v8-Brian > Bandit 01/08/2015 at 17:56

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wouldn't bet on it.

Bandit > If only EssExTee could be so grossly incandescent 01/08/2015 at 17:57

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Hahahahahahahaha!!!!1!11 The plastic sides of the radiator have leaked since I bought the truck over a year ago! I really need to buy a new one but don't really want to spend the money or time on it.

crowmolly > Bandit 01/08/2015 at 17:58

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Few things IMO:

1.) You have poor heat because there's a good chance your engine is not getting up to temp

2.) As ADM said, check the thermostat first, especially since it's cheap to replace

3.) You said the engine froze. Do you mean the coolant mixture froze solid? If so, take a flashlight and inspect everything you can see with the cooling system.

Bandit > crowmolly 01/08/2015 at 18:00

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Coolant froze solid somewhere in the engine. My car wasn't prepared to fight the sub zero temps we are experiencing. The radiator has had a small leak in the plastic sides since I got the truck, no other leaks that I can see though so all the freeze plugs are good.

If only EssExTee could be so grossly incandescent > Bandit 01/08/2015 at 18:03

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Well there's your problem. Overheating it prolly killed the thermostat.

crowmolly > Bandit 01/08/2015 at 18:06

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"Freeze plug" is kind of a BS term. The plugs are not there for frost protection. They are pressed in core plugs. You can freeze up and crack a block with the plugs in just doin' their thing.

I lost a water pump last year to poor coolant performance. If everything looks good, great. It doesn't hurt to be sure.

desertdog5051 > Bandit 01/08/2015 at 18:56

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Winter driving privileges:

BrianNutter > Bandit 01/08/2015 at 20:13

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You're on the verge of cracking the block without antifreeze if you haven't done it already. One is a lot cheaper than the other. Hopefully the rad is fucked, because otherwise the block isn't holding pressure and its behaving like a blown head gasket....which shows on the temp gauge as overheating.

AMGtech - now with more recalls! > Bandit 01/08/2015 at 22:22

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Hopefully freezing and overheating didn't crack the block or a head. You really should replace that radiator and thermostat. You may also have leaking intake gaskets.