After replacing my motor last month all of a sudden my Disco start missing, ran the code reader and it showed a misfire on #6. I cleared it out and drove fine, a few hours later missing again, code reader missing on 1 & 6 and it indicated the mass air flow meter might be going out?.... So I pop the hood and see this orange slime....

The orange slime in pic one is coming from the bottom of the intake plentium and dripping onto the driver side valve cover.

On the passenger side the orange slime is coming out of the heater core hose. If you look at the pic you can see a HUGE dripping of orange slime about to drip off the pipe...

What the heck is the orange slime?? is there a connection to the truck running with a misfire all of a sudden?....I hope this isn't a head gasket issue...jesus..

HELP!

 

Your truck came from the factory with Dex-Cool which is supposed to be changed every 36months or 45,000 miles, whichever is sooner.

Dexcool Pictures

On the driverside it is the throttle body heater gasket, easy and cheap DIY, I think its about $5 for the gasket, the most common leak on a DII.
the other leak, bad hose clamps.
That is what happens to Dex-Cool when it mixes with air, it turns into slime, now imagine what the inside of your cooling system looks like and what that is doing for your engine cooling.

 

I agree, Dexa-cool

but they JUST changed my motor, this is all new coolant in the motor...

 

They changed the engine not the hoses and other gaskets correct?
This is what happens when Dex-Cool mixes with air, you have leaks, they need to be fixed.

 

Doesn't mean they flushed out the entire system.
The misfires are on both left and right banks. That probably isnt headgaskets, but stranger things have happened. Pull the spark plugs and verify they arent wet.
Leaning towards maf is on its way out.

 

First, neither of those leaks will cause a couple of mis-fires much less a bad MAF.
I see you are still running factory plug wires, they are most likely the cause of the mis-fires, replace them with some 8 mm silicone wires like STI or Magnacors.
Are you mechanical enough to fix your coolant leaks, replace the t/stat if not cone and do a complete flush switching over to a good Green coolant?

 

who replaced the motor last month ? you or your mechanic?

 

My mechanic replaced the motor, he also had the radiator out of the truck. he said removing the radiator made it easier to pull the motor?....I assumed most of the coolant was out of the truck w/o original motor and radiator drained and out of the truck. He did however put Dexa-Cool in the truck after everything was installed, I remember seeing the orange coolant now.

I'm going to take it over to the oil change place today or tomorrow and have them flush it and put the green stuff back in it...

I don't have the patience for mechanical work let alone to change the plug wires. I tried to pull the #6 wire off the plug yesterday morning and it gave me enough hassle where I just said forget it, I'll take it to someone...lol

 

You might want to rethink taking the truck to a shop for the wires. With good wires, and labor, you could be looking at an easy $400.
As for the radiator, how many miles on it and was the t/stat replaced?

 

"My mechanic replaced the motor"

You might want to look into finding a new one, if he seen it out the door with a leaking heater hose and throttle body heater he might not be the right guy.
If he put a engine in it and removed the radiator he should have preasure tested it before he sent it on its way, especially with a engine that is know to be trashed by overheating.
By the way it time to invest in some new hose clamps.