2004 V8 overheated... Any help would be great!

[ThePMFG]

So I recently purchased a 2004 Limited V8 4WD, it has 180k miles on it. I drove it for just a couple days and it ran and drove awesome! Then suddenly as I was cruising down the interstate, suddenly the temperature gauge spiked to the red, and as I was pulling over to the shoulder the truck completely shut off. I let it sit for about 30 minutes to see if I could at least limp it to the next exit, but it wouldn't start. It was starter was engaging and trying to start but just wouldn't turn over. Called insurance and they got a wrecker out to me (which took about an hour) and when the wrecker showed up I tried to start it again and it fired right up! No weird noises, no rough idle, everything sounded and seemed to function as it should. So we loaded it onto the trailer and carried it home. Now my question is where should I start to resolve this issue? New Water pump/thermostat? I'm hoping that's my only issue. Has anyone else encountered this before?

 

[bamma]

Did you get any lights on in your dash? If so, run the fault codes. Could be low on coolant, could have a leak, bad waterpump. Lots of stuff.

If it is the water pump, you may want to change the timing belt if it hasn't been done recently. Good luck.

 

[07V8]

Failed thermostat if it was never done.

 

[ThePMFG]

I'm not sure if the thermostat or water pump were ever changed, I didn't see either one on the car fax report as maintenance that was done. It's a California vehicle with zero rust, inside, outside, even the engine bay were completely spotless!! This thing looked like a brand new vehicle in every possible way. I've already ordered a new water pump, thermostat and timing belt kit.... So I'm hoping that doing that and flushing the radiator will solve my problems.

 

[ThePMFG]

Did you get any lights on in your dash? If so, run the fault codes. Could be low on coolant, could have a leak, bad waterpump. Lots of stuff.

If it is the water pump, you may want to change the timing belt if it hasn't been done recently. Good luck.

CEL did pop on but I haven't had a chance to read the code yet. That is gonna be the first thing I look at before doing anything.

 

[BlackWorksInc]

The core issue here is going to be how the headgaskets and the heads took to being overheated. It sounds like the engine seized on you, which means it got pretty damn hot, possibly hot enough to cause some issues. It's a cast iron block with aluminum heads, so there is a possibility the heads might have become warped, it's unlikely, but something to be aware of.

I'd see if you can get/borrow a leak down tester when you do your timing belt and just the compression before you tear the motor down. Most likely you'll find everything is within specification and you just need to get the maintenance done. I'd also order a oil testing kit like BlackStone Labs and test the oil you have in the engine and keep an eye on it for the next oil change or two.

These are fairly tough motors and even the one or two I have seen overheated ended up surviving it with little to no issue, but it wouldn't hurt to be a bit cautious and double check some stuff since you'll have it half apart for the timing belt anyways.

 

[ThePMFG]

The core issue here is going to be how the headgaskets and the heads took to being overheated. It sounds like the engine seized on you, which means it got pretty damn hot, possibly hot enough to cause some issues. It's a cast iron block with aluminum heads, so there is a possibility the heads might have become warped, it's unlikely, but something to be aware of.

I'd see if you can get/borrow a leak down tester when you do your timing belt and just the compression before you tear the motor down. Most likely you'll find everything is within specification and you just need to get the maintenance done. I'd also order a oil testing kit like BlackStone Labs and test the oil you have in the engine and keep an eye on it for the next oil change or two.

These are fairly tough motors and even the one or two I have seen overheated ended up surviving it with little to no issue, but it wouldn't hurt to be a bit cautious and double check some stuff since you'll have it half apart for the timing belt anyways.

Yea, those are good points. I know there was no smoke or anything, no weird noises or sounds. It just had the temp spike to red and ran hot and then shut off. And an hour and a half later started right up just fine and idled normal for the minute that I ran it to get it on the trailer.

 

[dusty619]

check the radiator cap and change it out
a friends radiator cap disintegrated on a trail couple weeks back quick and easy fix.

 

[ThePMFG]

So I finally went out to start it today and now it idles rough as hell, like its missing. Still no smoke coming out of the tail pipe, the oil on the dip stick looks good, (gonna drain it though to see if it's milky) and there's some kinda white gel stuff on the bottom of the radiator cap?? Gonna drain that too to see if there is any oil in the anti freeze. Any other ideas or suggestions about this that might help me? I'm really hoping that this motor isn't toasted.

 

[Rodtheviking]

Coming from Land Rovers.. sounds like a blown head gasket, especially with the white goo in the radiator.