Last week my tensioner pulley locked up while driving and crumbled, as I lost power steering I knew something was wrong. I tried to baby it a few blocks to a better 'breakdown place' causing it to overheat . Although I didn't go but maybe a quarter mile and park it damage was done. Instantly she poured out the water pump. After getting it towed home I replaced pulley, water pump , and thermostat. Test drove couple miles, it seemed alright. Got to temp , heat worked, no leaks from water pump. Next morning I drove it too work, on way home my temp started rising almost getting near red and dropped back down. 15 miles later I pulled in drive and engine was smoking from above water pump. After a quick look, it was grimy and wet around temperature sensor. While there I replaced temperature sensor, o ring on the hard heater core line and the triangle elbow pipe o-ring. All three of these are going into the same area so figured it was best. After changing these my truck got up too temp and the de icer hose next too the temperature sensor blew out... I have took overflow tank off and raised it above engine while cool and opened bleeder and made sure I have no air or minimal air in coolant system. Making sure coolant levels are where they need to be. Before I play with this hose and throttle body gasket ??!! Am I missing something, is this snowball effect normal ? What's next I guess is what I'm asking ??

 

@gsites89

It could be the head gasket if it blew out to the water passages you will get over pressure and weak points can fail. Or worst case a crack in the block, rare but not uncommon
Also rad cap, overheats often kill rad caps, if you are dumping water from the overflow and hoses are failing it could be your rad cap maybe shot

How do you check your temps, the dash gauge is useless it does not move to about 230F that is 14F before the overheat light comes on.

 

I thought about a head gasket , but I don't have symptoms for that as far as overheating, or my oil looking milky. I currently have nothing to read exact temps, just the gauge unfortunately. I will be buying something soon for that. I also will be getting a cap just in case when I pick up the heater plate and gasket.. I no it's driver side and it pools on top the block there and under the ac condenser where it sits on the bracket. So definitely somewhere up high. I'm going to look into the head gasket more.

 

The few times I have made trips to check the status. It doesn't overheat, seems as if the thermostat kicks in late. Say this bc before the problem as my truck would reach temp I would have instant heat. Now when it reaches temp it's cold and takes a extra minute for heat to kick in. And only when I kill the truck the leaking begins. Which makes sense being the coolant is in rotation while driving. But wouldn't I overheat if my head gasket was bad ?

 

@gsites89 As to overheat with a head gasket to water jacket leak not necessarily, when mine went I went up 7 degs at idle, from 188 to 195 but I was overpressured. But water pooling under the A/C is a could the throttle body cooler lines, I bypassed mine and ran from the upper intake to the coolant directly. It has never been an issue.

For monitoring get a bluetooth OBD dongle off amazon and Torque for your cellphone, it reads codes, and lets you monitor lots of stuff. Spend about 50.00 there are cheaper ones but they are not a good.

 

Thanks for the help Gallant ! I've read about the bypass, I believe that's my next move, connect those lines together and see where my leak takes me. Iam definitely going to invest in a temp reader, I see some online that fit the budget. Much appreciated !

 

Cheapest temp reader is a Elm327 with an android phone with the torque app. About $10 on Amazon. They also sell an OBD2 temp readers cheap on Amazon but they are not reliable. It sounds to me like you have an overpressure condition after your overheat, likely a blown HG. You need to read this: https://extinctmotorsports.com/the-e...s-10-min-read/ and this: https://landroverforums.com/forum/di...thread-105010/

You can rent a coolant pressure tester from Advance Auto, pressurize the system, and find the leaks. If it does not hold pressure and there are no external leaks you have a blown HG. Be careful, if the HG leaks you could fill the cylinder with coolant and bend a connecting rod cranking it over. Remove the spark plugs and spin it over to get the coolant out of the cylinder.

Good luck!

 

Nice Nice!! Interesting, Helpful, And Very Informative On The Blogs. Simple And Well Put. I Will Definitely Be Scanning And Re Reading Those Again ! The Pressure Tester Will Be Available Tomorrow, So We Will Go That Route And See What Happens .. Thanks For All The Info!

 

After changing heater plate and both hoses connected to it. Truck was fine after that, glad I didn't have to play with the head gaskets 👍