Q: Crankshaft not spinning freely 1997 Ford Ranger

asked by on February 04, 2017

I have a 97 ford ranger 2.3 L engine w/ an automatic transmission. Recently I removed the head block to get it cleaned up, resurfaced and what not. I also removed the transmission to change out the rear main seal. after putting the transmission back on the crank shaft would still spin freely. but, after i put the heads on the crank shaft would stop spinning freely. I can't put the timing belt on because i can't get the proper alinement between all three pulleys. what could be stopping the crankshaft from spinning? i already removed the starter and rediff.

My car has 150000 miles.
My car has an automatic transmission.

Hi there - this engine is allegedly NOT an interference engine. Translation - if the timing belt breaks, or isn’t present, it should not be possible for the valves to contact the pistons, and cause a lack of rotation as you describe. However - first rule of engine assembly is that as soon as you do anything that cause rotation or smooth motion to cease - something is wrong, and you back up two steps. Remove the cylinder head if necessary to make sure crankshaft rotation is free, and the timing marks on the harmonic balancer truly represent Top Dead Center (TDC) for starters. Then line up the cams in the TDC position, block them with the timing alignment tools, and re-assemble the cylinder head to the engine. Good luck with this!

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Rear main seal leaking
Hi. Being a car that is over 20 years old you are probably going to need a new transmission. A technician from YourMechanic can come out and replace the Speed sensor (https://www.yourmechanic.com/services/transmission-speed-sensor-replacement) and see if that fixes the issue. If...
No start
Hello. A no start condition can be caused by a wide variety of issues, and from what you describe it would appear that the vehicle may have more than one issue. If spraying brake cleaner into the intake helped it...
Car will not start intermittently while in PARK but always starts on NEUTRAL.
Hi there, thank you for writing in and providing a detailed description. I'd be happy to give my insight on what to do next. I would make the same conclusion about the neutral safety switch (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-neutral-safety-switch). I think Pep Boys...
The smart key can turn the ignition but can't start the car
Hi there. It appears that the issues you're experiencing may be caused by the ignition lock cylinder (https://www.yourmechanic.com/article/how-to-replace-an-ignition-lock-cylinder-by-timothy-charlet). In some newer vehicles (made after 2000) this part has multiple springs inside the cylinder that allows you to press the key...
Transmission "popping" out of gear
This may suggest failing transmission synchros. As you may know, when a clutch drags, it is not letting go of the disk fully which overloads the synchros and burns up the friction surfaces quickly. Synchros work by speeding up or...
Heater works randomly in my lexus es350...any ideas??
Hi there. If the thermostat is damaged or faulty, it would typically create an overheating problem associated with the heater's failure to blow hot air. Sometimes this issue can be caused by an obstruction inside the heater core. Sometimes flushing...
My BMW 335i n54 coolant line hose o ring needed to replaced. I think coolant is leaking from there.
The best thing to do is get a coolant pressure test and hook it up to your radiator or reservoir and pressurize the system to 15 psi. If there is a leak, it will appear under a pressure. If you...
My car has rough idle. When I give it gas the car won't accelerate.
At your car's age and mileage, it really could be just about anything. And since the self diagnostics on the car are not very sophisticated, it's going too take some old-school diagnostic work. If you are behind on any of...
I have a 2007 GMC sierra classic. What can be the problem if I have no pressure on the brakes
Hi Jessica. Thanks for contacting us today. One of the most overlooked components that can cause a brake pedal issues like you've described is the proportioning valve. This component is located under the hood and is responsible for adjusting the...

Related articles

Common Signs Your Drive Belt Needs Replacement
A car drive or serpentine belt keeps your engine running smoothly. Unusual noises from the engine and visible belt wear means it needs replacement.
2012 Ford Edge vs. 2012 Honda Accord: Which One Should I Buy?
Comparing a small SUV or a crossover to a sedan or coupe doesn’t quite seem fair: while the crossover is likely to cost more, it will also have a different skill set than the car as well as a completely...
The Best Used Cars to Buy If You’re a Plumber
Plumbers Plumbers need to carry around all manner of tools and supplies. If you’re plumbing a large building, or even a decent sized home, you’re going to need a vehicle that has quite a bit of cargo capacity. A car...