the-outdoorsman

Only my second post here. I stumbled upon this place when I was searching out android car stereos. Any way a few days later I found a problem and here I am. My check engine light came on today and I checked my codes and it showed a misfire on cylinder 7. So I pulled out the coil pack and there was antifreeze on it. I looked down in the hole and just the top of the plug was still showing as it was full of antifreeze. I took a rag and screwed driver and soaked up the antifreeze and that fixed my misfire. So my question is, how is the antifreeze getting in there. My guess is a blown head gasket. It is a 2005 F150 4x4 with a 4.6

Any help would be much appreciated.
Thanks Kevin

the best engines

Check other post on this problem - others that had it found hose was cracked & leaking into plug well ( not a cracked head)

cts2433

You'll most probably need new intake gaskets. The front runner of the intake (between cyl 1 & 5) is the coolant crossover. If Cylinder 7 plug well had coolant in it then your intake gasket is leaking below the thermostat on underside of the intake. Coolant will then run along the cylinder head (between the valve cover & intake) and will fill the spark plug wells with coolant. It's not uncommon when you remove the intake to find that the heads are pitted of the around the front and/or rear coolant passages from electrolysis. I always use a little JB Weld and a razor blade to fill the pits and then replace the intake gaskets.

the-outdoorsman

I have a pressure test scheduled for this mornong. I hope that will tell me for sure where the problem is. I searched out the hoses around there and could not see any leaks. I did notice what looked like a leak under the thermostat though. I took a picture but it is hard to see in the photo. I hope it is the intake or hose and not the head. They quoted me around 2500 to replace the head gasket at the ford dealer. 18 hours of labor. I remember back in the day when I was in high school. I pulled the motor out and tore it down and put it back together in that kinda time frame. Things were a lot simpler back then.

techrep

iTrader: (1)

You could almost buy a reman engine for that much..

the-outdoorsman

That's what I said to the guy when he told me how much.

cts2433

Have your intake gaskets replaced. That'll fix your problem. Alldata shows 4.4 hours labor to replace gaskets. Intake gaskets, thermostat and oring and VC7 gold coolant is the only parts you'll need. But would be a good time to replace your spark plugs while the intake is off.

the-outdoorsman

Just had pressure test done and it is the intake manifold gasket. They said 5 hours in labor. 750 bucks to fix it. I all ready did my plugs this last summer. I may tackle this myself. Not sure yet.

Martian

Never taken off the intake manifold myself but it doesn't look like something I'd be willing to spend $750 on to have someone else do it.

cts2433

It's not that big of a job. Just allow yourself the better part of a day with hand tools. You'll need right and left intake gaskets and thermostat and oring. Make sure you drain cooling system so as not to get coolant into cylinders. You'll need 7, 8, 10, 13mm sockets and a swivel, 1/2 rachet for belt, 1 1/16" wrench for EGR tube, 5/8" fuel line disconnect tool, torque wrench (not absolutely necessary),

couple cans of brake cleaner, couple of razor blades (makes the job easier to clean head surface), and at least 1 gallon of Motorcraft PM7 gold coolant. Torque is 18 ft lbs for intake.