- Joined
- Sep 21, 2007
- Messages
- 1,443
- Reaction score
- 671
- Points
- 113
- Location
- Wa, Bremerton 98310
- Vehicle Year
- 1987
- Make / Model
- Ford
- Engine Size
- 87Ranger Endrigo 2.9l, 87BII Endrigo 4.0l
- 2WD / 4WD
- 4WD
- Total Lift
- Ranger 5" (1½" suspension), BII 4" suspension
- Total Drop
- Ranger 5sp, BII A4LD
- Tire Size
- Ranger 33"/4:10LS, BII 33"/3:73LS
- My credo
- Deengineer until it is how Blue Oval should have sold it!!
UPDATE:
In regards to my donor "turnkey" 94 Ranger non EGR 4.0L, that had been gone over once before, ran but burned a little oil.
1) block was bored 0.5mm over, cylinder walls still look very good
2) heads disassembled; not 1 valve guide seal was seated or properly installed and all the valve guides were severly worn. This engine must have drank oil
3) the valves; stems looked new, heads were horribly caked with carbon and burnt oil, exhaust valve seats badly pitted
4) upper intake manifold gaskets both cracked
5) lower intake manifold gasket deformed and unable to properly seal
6) all pushrod ball ends worn, unusable
Currently the only choice in new 01+ Ford 4.0L SOHC replacement piston sets is from Mahle. They have an Al cast set, no skirt treatment and a CH of 1.444"; so far this is the closest to the 94 Ford OHV 4.0L's piston CH of 1.45".
It turns out that almost all aftermarket piston sets have decreased pin height to maintain the stock compression of the engine due to head milling and block decking durring rebuilding.
The Mahle set is not the cheapest but does cost as much as the Keith Black SilvOlite hypereutectic's on sale. That makes it a bit of a pill to swallow for me, though I will always take my performance goal over bragging rights so the Mahle set takes it without a second thought.
In preparation to inspect the bottom end I expect the worst and hope for the best. I will probably need to replace all the bearings and that's if I'm lucky.
On a more optimistic note, the new pistons/rod combo will liberate the crank of 35g per cylinder.
In regards to my donor "turnkey" 94 Ranger non EGR 4.0L, that had been gone over once before, ran but burned a little oil.
1) block was bored 0.5mm over, cylinder walls still look very good
2) heads disassembled; not 1 valve guide seal was seated or properly installed and all the valve guides were severly worn. This engine must have drank oil
3) the valves; stems looked new, heads were horribly caked with carbon and burnt oil, exhaust valve seats badly pitted
4) upper intake manifold gaskets both cracked
5) lower intake manifold gasket deformed and unable to properly seal
6) all pushrod ball ends worn, unusable
Currently the only choice in new 01+ Ford 4.0L SOHC replacement piston sets is from Mahle. They have an Al cast set, no skirt treatment and a CH of 1.444"; so far this is the closest to the 94 Ford OHV 4.0L's piston CH of 1.45".
It turns out that almost all aftermarket piston sets have decreased pin height to maintain the stock compression of the engine due to head milling and block decking durring rebuilding.
The Mahle set is not the cheapest but does cost as much as the Keith Black SilvOlite hypereutectic's on sale. That makes it a bit of a pill to swallow for me, though I will always take my performance goal over bragging rights so the Mahle set takes it without a second thought.
In preparation to inspect the bottom end I expect the worst and hope for the best. I will probably need to replace all the bearings and that's if I'm lucky.
On a more optimistic note, the new pistons/rod combo will liberate the crank of 35g per cylinder.
Last edited: