Updates: Upper End Rebuild
Been a while since I updated my thread, here's whats been going on:
Upper End Semi-Rebuild
Symptoms Summary:
- The computer will routinely generate codes P0300 - Random Misfire and P0340 - Camshaft Position Sensor Failure.
-The truck feels sluggish, like its towing a heavy trailer (i looked... its not) or the breaks are dragging (they're not), or its not running on all cylinders.
-The truck smells like its running very rich. When I back up, It smells like latex paint or turpentine. I've been filling up at several different gas stations, all high volume and no difference in smell. The truck has been averaging about 10 miles per gallon in mixed driving, it used to get around 13.
- There is often a surging or bucking. Sometimes it is minor, other times VERY pronounced. This is usually when the CEL is set off.
-The last two times I filled up with fuel from the same high volume Sunoco station, about 15min/3miles later the CEL will be thrown and the truck will run like crap. It feels like its running on half its cylinders, won't idle, shakes, very slow, etc. There was a very strong smell of gas in the cab as well. I'm thinking canister purge system? Both days it was around 75 degrees out, and I was in stop/go traffic.
Fix
After doing a leakdown test and simply looking at the condition of the spark plugs, it was determined that the #2 cylinder was not firing/firing intermittantly. The intake valve was observed as leaking, as well as a breach in the cooling system indicating a blown head gasket. The solution? A complete valve job and new head gaskets along with other related parts.
The valve job was performed by Whitaker Automotive, in Needham MA. The machinsity Rusty did a very impressive job on the heads, and they are highly recommended.
Work Preformed:
-Clean heads
-Disasemble
-Measure springs, measure valve stems, measure valve guides.
-Check for warping/straightness
-Magnaflux for cracks
-Grind valve seats
-Grind valves
-Knurl valve guides
-Replace valve guide seals
-Grind 0.010 off heads due to slight warping
-Paint heads
Parts ordered from
www.FordPartsNetwork.com ,
www.SummitRacing.com , and
www.50resto.com also my local Autozone. Expensive expensive.

I'm doing it with quality Ford, Ford MotorSport, Fel-Pro, and upgraded aftermarket. Don't want to take any chances here.
Parts ordered include:
-FMS Graphite Head gaskets (Ended up not using, read on...)
-Felpro Head Gaskets
-Bonded metal/ruber valve cover gaskets
-Ford Exhaust manifold gaskets
-Ford gaskets for TB, EGR, IAC, Intake elbow, etc.
-Fel-Pro GT40 Lower/Upper Intake and thermostat set
-Fuel injector o-rings
-New head bolts
-New exhaust manifold bolts
-New Valve Cover bolts
-New Motorcraft thermostat
-Acell High Power EDIS coil packs
-Taylor Spira pro ignition wires
-Ignition wire/spark plug heat sheild material
-Bosch O2 sensors (for before the cats)
-Lots o' RTV, oil, antifreeze, brake cleaner, gloves, yada yada.
and so much more... $$$$$$$$$$$
As you can see, I also redid the ignition system completely and the O2 sensors.
Photos and dissasembly
Lower Intake removed:
Wrapped in foil for the night:
Re-tapping alternator mounting bracket:
Had a lot of trouble getting this one bolt out, turns out it grabbed some metal in the threads and dragged the shavings all the way though. I was lucky and didn't need to increase the size of the hole, merely cleaned out the threads. Used a die on the bolt to clean it out - all set!
Steering shaft disconnected:
Two-minutes, one bolt. Disconnecting the steering shaft and collapsing it allowed for MUCH easier access to the exhaust manifold bolts and the head bolts. Would also make easier access for routine spark plug changes.
Rockers, pushrods, and driver's side exhaust manifold removed:
Decided to remove the manifold since the two collector bolts were not that rusty. With all of the brake lines, it will make for much easier access to the head bolts. Man... this would be the time to upgrade to some headers.
A can of PB blaster, a pack of ziplock bags, a few runs to Sears for tools, 4ft and 2ft sections of galvanized pipe "breaker bars" and a broken fingernail later: Removed both heads!
Ended up having to rig up a support for the driver's side accessory bracket. Supporting the A/C compressor and P/S pump, the aluminum bracket's 3 bolts
only attach to the head. I told myself from the begining I wasn't touching my redone A/C system - and it looks like I'll be a-ok. Funny... the passenger side bracket, which only holds the alternator and tensioner/idler, and could have been removed no sweat, mounts to the block.
Exhaust manifold bolts weren't that bad, neither were the head bolts themselves.
Here are some photos:
A/C & P/S support:
1" Box tube and nylon line, there is also wood underneith
Both heads removed, and their head gaskets:
GT-40P Head (Top):
Passenger side head, (CYL #1-#4):
#2 is oily
Passenger Side Pistons (#1-#4):
Driver Side Pistons (#5-#8):
There were some key steps that I didn't get shots of, or they came out really blurry.
Cleaned Block and Piston tops:
Driver's Side
Passenger's Side
I used Permatex' spray on gasket removed and single edge razor blades to clean the block surface. Some overspray got on the piston tops, and lifted the carbon right off!
Painting
In the downtime while the heads were being machined, I broke out the wire wheel and rattle can.
Primed Valve Covers
Upper Intake..... shiny!
Refurb Heads
I took the heads to Whitaker Automotive, in Needham, MA. Recommended to me by a local Ford dealer, I was impressed by the machinist when I talked to him and saw his work/shop. This was a very blind item for me, as I had no basis or other recomendation for a shop.
$385 later:
Head Installation
These cast iron heads were quite heavy, and hard to maneuver. I rigged up some handles on them to allow lowering into place. I put in an exhaust manifold bolt, attached some line, and looped through a pushrod hole. The handles not only allowed for easy grasping of the head, setting the angle for lowering onto the dowel pins was quite simple. (I didn't think of this method untill after my Dad and I tried to lower a head in place, but only busted the head gasket in the process. Luckily Autozone has good felpro gaskets for $13.99ea. Order Extras.)
I also rigged up a 1"x1" steel tube across the rear of the engine compartment, allowing true lowering of the head into position. Made things infinitley easier.
Lots of n/c brake cleaner was used to make sure everything was squeeky clean. Don't tell WallMart execs, but I think I'm still high from it. :smoke:
Reassembly
Ok.. so I don't have photos of head bolt torquing, valve train re-assembly, or lower intake gaskets. :fire:
But, I did grab this photo of the new Motorcraft t-stat ready for installation.
Lower intake, fuel injectors, valve covers, alternator, belt, upper radiator hose:
Note: Tin foil should yeild +45hp
Upper Intake, EGR Eblow, Throttle Body, Ingition Coil Bracket:
The Original thread, over 5 pages long can be found here:
http://www.explorerforum.com/forums/showthread.php?t=108712&page=1&pp=20