Will the cylinder heads from a 2002 VF750C fit the motor of a 1997 VF750C ? My '97 needs a valve job because exhaust valves are roached, and I have a motor from a wrecked 2002.

You don't say how many miles on the motor, if any, since rebuild... With the lack of pertinent information, I'd have to guess that Its either a bad head gasket or the rings are gone.

There is no "exhaust valves" for the push rods. If you are asking where the exhaust valves are, they are in the cylinder heads. You would have to disassemble the engine to the point of having the cylinder heads off the engine to replace the exhaust valves,but usually you would do a complete valve job on the heads if there were a problem of that nature.

Yes

3.7L EKG Powertec, engine. SOHC with roller followers,
did you check compression, or just P030x codes???????
and what if its just a stuck valve or collapsed lifter
why not ask for help in diagnosis?
compression bad? on one or more? cylinders, post #
pull the Valve covers, see if there are broken valve springs
or bad cam lobes, or lifter bad? (motion)
if it didnt burn oil , try rebuilt heads.?

ran for 12 years, so what is the mileage>? 300k?
Oil changes, at 5000 ?

the 3.7 may fit...says wiki.

• 2002-2012 Dodge Ram 1500
• 2004-2011 Dodge Dakota
• 2004-2009 Dodge Durango
• 2007-2011 Dodge Nitro
• 2002-2013 Jeep Liberty/Cherokee
• 2005-2010 Jeep Grand Cherokee
• 2006-2010 Jeep Commander
• 2006-2010 Mitsubishi Raider
• 2002 Dodge M80

warning, some engine blocks may NOT be same. (filter mounts, engine mounts) check first.
but you can find this at any engine builders web site. (google them)
ive swapped many and engine, even wrong engines.?grin
there are always choices, i always have and had spare cars.
so down time is never an issue for me.
but others yes. (rent a car is one option while fixing another)
1: if the block is bad get a short block.
2: if the heads are bad get yours rebuilt , or exchanged.
3: if you blew the engine to total destruction, pistons hit valves? (rare)
then get a used engine, or buy a rebuilt.
or pull yours and take it to any top machine shop and drop it off.
bingo, fixed and cheap too. no middle man, to rip you.

history.
The 3.7 liter PowerTech V-6 engine is, essentially, the 4.7 V-8 with two fewer cylinders.
then later, morphed to the Pentastar V6. (today's motor)
cast iron block, (lasts long time, easy to bore and rebuild)
no rubberband cam belts, real chain, drive.
2 valves per cyl. making head rebuilds fast and cheaper.
forged pistons, not cheap cast.
MOPAR is not POS.
ask engineer Brian Crothers

I run the 3.8L in my 08 JK.
its a real low tech, push rod motor. (ended in 2011)

id fix mine, if it failed
my guess is it is head failure, , so get the newer
rebuilds with pinned, valve guides and run it.

I suspect you have some bad valves, probably exhaust valves. Do a compression test on each cylinder and make the sure the compression of each cylinders is a similar value. You will need to
look up what the compression value should be in a Chiltons or other manual for your car.

This happened to me on my 1992 Tercel. When going up a hill I would punch the gas to the floor
and not speed up until I geared down. I took the cylinder head off and 2 exhaust valves looked really bad. I went to a cylinder head shop and the guy that works there immediately told me I need a valve job and pointed out the beat up looking valves I saw. They machined the valve seats and replaced the bad valves. Rockers need to be adjusted with the engine warm, so youll need to adjust the rocker clearance after you re-install the head and run the engine.

If the compression is much lower in one or more cylinder those are the ones with a problem.

You can get a loaner compression tester from autozone. If you have never checked compression, I will tell you how if you need.

2.0 is a non clearance motor. When the timing belt slips the piston comes up and hits the valves and bends them. Unfortunately due to the belt teeth stripped out and the crankshaft continuing to turn when the cam did not turn left the valves open and the piston bent the valves. You will have to remove the cylinder head and check the cylinder head if it needs surfaced and do a valve job on the head and replace any valves that are bent. Make sure the piston is not damaged (hole punched in it from the valve)

it definitely could be a head gasket. A cylinder leak down test will help confirm where the problem might be. If it leaks into the intake manifold or out of the exhaust pipe you may need to have a valve job done on the head. If it leaks into one cylinder 2 then look towards the head gasket. If it leaks into the oil pan you might have piston or ring damage. Other then that you won't know until the cylinder head is removed to do a visual inspection of all the parts.

The mechanic is most likely correct the vehicles have double intake as well as double exhaust valves which allows the motor to retain most of its power even if one of the valves burns out. However if an intake valve burns or fails there usually is a popping sound or misfire upon acceleration in this case you most likely have a burnt or worn exhaust valve, you have about six months to a year before the truck starts really misbehaving. Just address the side of the engine or head that has the burnt valve don't let them talk you into doing both cylinder heads you may go 250,000 to 300,00 miles before having to do a full valve job on the truck. These motors are fairly tough so just do the one head not both when the time comes.

I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.

96 escort 1.9L




Engine Components
Item Part Number Description 1 6766 Oil Filler Cap 2 6A548 (8 Req'd) Valve Cover Bolt 3 6582 Valve Cover 4 — Exhaust Manifold Shield-to-Exhaust Manifold Nut (4 Req'd) 5 9A462 Exhaust Manifold Shield 6 — Exhaust Manifold Shield Stud (4 Req'd) 7 9430 Exhaust Manifold 8 9454 Exhaust Manifold Nut 9 9448 Exhaust Manifold Gasket 10 — Exhaust Manifold Stud (Fine Thread), Short (4 Req'd) 11 — Exhaust Manifold Stud, Long (1 Req'd) 12 — Exhaust Manifold Stud (Medium Thread), Short (1 Req'd) 13 6518 Valve Spring Retainer Key 14 6514 Valve Spring Retainer 15 6513 Valve Spring and Damper, Intake 16 6C515 Valve Tappet Guide Plate Retainer 17 6571 Valve Stem Seal 18 6513 Valve Spring, Exhaust 19 12405 Spark Plug 20 6269 Camshaft Thrust Plate 21 — Camshaft Thrust Plate Bolt (2 Req'd) 22 — Cup Plug 23 6B273 Camshaft Oil Flow Control Rod 24 6K292 Camshaft Front Seal 25 6256 Camshaft Sprocket 26 6278 Camshaft Sprocket Washer 27 6K252 Camshaft Sprocket Retaining Bolt 28 6L269 Camshaft Sprocket Key (5 x 18) 29 6250 Camshaft 30 6051 Head Gasket 31 6A008 Cylinder Head to Block Dowel 32 6010 Cylinder Block 33 6507 Intake Valve 34 6505 Exhaust Valve 35 6049 Cylinder Head 36 — Intake Manifold Stud (7 Req'd) 37 17A084 Engine Lifting Eye 38 — Engine Lifting Eye Bolt (2 Req'd) 39 9439 Intake Manifold Gasket 40 — Bolt 41 9723 Accelerator Cable Bracket 42 9424 Intake Manifold 43 — Intake Manifold Nut (7 Req'd) 44 9D476 EGR Valve Gasket 45 — Exhaust Gas Recirculation (EGR) Valve Bolt (2 Req'd) 46 9D475 EGR Valve 47 — Fuel Injection Supply Manifold Bolt
(2 Req'd) 48 9F593 Fuel Injector 49 9D930 Fuel Charging Wiring 50 6786 Oil Level Indicator Tube Bracket 51 — Oil Level Indicator Tube Bracket Bolt 52 6754 Oil Level Indicator Tube 53 6750 Oil Level Dipstick 54 9D280 Fuel Injection Supply Manifold 55 — Vacuum Fitting 56 9E498 Main Emission Vacuum Control Connector 57 — Vacuum Tap 58 — Vacuum Hose 59 9B989 Throttle Position Sensor 60 — Screw and Washer 61 9F782 Throttle Position Sensor Gasket 62 — Throttle Body Bolt (4 Req'd) 63 — Idle Air Control (IAC) Valve Bolt
(2 Req'd) 64 9F715 Idle Air Control Valve 65 9F670 Idle Air Control Gasket 66 9E926 Throttle Body 67 9E936 Throttle Body Gasket 68 — Vacuum Fitting 69 — Camshaft Position Sensor Screw 70 6B288 Camshaft Position Sensor 71 8255 Water Hose Connection Gasket 72 — Water Hose Connection Bolt (3 Req'd) 73 8592 Water Hose Connection 74 8575 Water Thermostat 75 6065 Cylinder Head Bolts 76 6500 Valve Tappet 77 6K512 Valve Tappet Guide Plate 78 6564 Rocker Arm 79 6A528 Rocker Arm Seat 80 6A527 Rocker Arm Bolt (8 Req'd) 81 — Ignition Coil Mounting Bracket Bolt
(3 Req'd) 82 18827 Noise Filter Condenser 83 — Ignition Coil Mounting Bolt (4 Req'd) 84 12259 Spark Plug Wire Set 85 12029 Ignition Coil 86 12043 Ignition Coil Mounting Bracket A — Tighten to 5-12 Nm (4-9 Lb-Ft) B — Tighten to 5-7 Nm (3-5 Lb-Ft) C — Tighten to 21-26 Nm (16-19 Lb-Ft) D — Tighten to 2-10 Nm (1.5-7 Lb-Ft) E — Tighten to 8-13 Nm (6-9 Lb-Ft) F — Tighten to 40-55 Nm (30-41 Lb-Ft) G — Tighten to 16-20 Nm (12-15 Lb-Ft) H — Tighten to 20-30 Nm (15-22 Lb-Ft) I — Tighten to 8-10 Nm (6-8 Lb-Ft) J — Tighten to 8-11 Nm (6-9 Lb-Ft) K — Tighten to 23-30 Nm (17-22 Lb-Ft) L — Tighten to 20-40 Nm (15-30 Lb-Ft) M — Tighten to 4.5-7 Nm (3-5 Lb-Ft) N — Tighten to 18-26 Nm (13-19 Lb-Ft)