mosher41
New Member
- Joined
- Nov 9, 2009
- Messages
- 56
- Reaction score
- 0
- Points
- 0
- Location
- Macedon, NY
- Vehicle Year
- 1999, 1996, 201
- Transmission
- Automatic
MY complete re-build is complete and back running. and running great. Some observations while inside the motor. As far as you guys asking how to " Soup Up" your 4.0 DONT BOTHER....the heads will flow decent numbers, but the intake is a joke 25% of the port is casting, so you really cant match port the intake to the heads, if someone made an aftermarket intake this motor would make great numbers BUT its only a single timing chain, which wouldnt last very long making big HP numbers. The cylinders were in very good condition as to only need a slight de-glaze, the crank pins were almost dead on...to .0005. NICE ! Rods & crank checked for straight and mag'ed.
I have a K&N Air induction ( Free from prior sponsor package) Dont waste your money buying one, coated headers, a little performance gain and it sounds cooler and looks nice under hood. Jet Chip (also free) cant notice much differance here either.
ALL DAMAGE INSIDE MOTOR WAS HEAT RELATED....IF YOUR ENGINE OVER HEATS YOU MAY BE IN A WORLD OF CRAP. I believe the plugged cats caused most of the damage, but I don't know what damage was done before i bought it.
I replaced the following:
Piston & Rings
Main, Cam & Rod bearings
Timing Chain & gears
Oil Pump
Water Pump
Cam & Lifters
All Seals and Gaskets
Gasket Matched Exhaust ports
Polished Intake ports on heads and lower intake
IAC
Water temp sensor
Pretty happy with it right now, it's the best it has ever idled, will run a couple tanks thru to give a MPG report.
I have a K&N Air induction ( Free from prior sponsor package) Dont waste your money buying one, coated headers, a little performance gain and it sounds cooler and looks nice under hood. Jet Chip (also free) cant notice much differance here either.
ALL DAMAGE INSIDE MOTOR WAS HEAT RELATED....IF YOUR ENGINE OVER HEATS YOU MAY BE IN A WORLD OF CRAP. I believe the plugged cats caused most of the damage, but I don't know what damage was done before i bought it.
I replaced the following:
Piston & Rings
Main, Cam & Rod bearings
Timing Chain & gears
Oil Pump
Water Pump
Cam & Lifters
All Seals and Gaskets
Gasket Matched Exhaust ports
Polished Intake ports on heads and lower intake
IAC
Water temp sensor
Pretty happy with it right now, it's the best it has ever idled, will run a couple tanks thru to give a MPG report.