Skip the auto shop - Our mechanics make house calls

Q: Crankshaft not spinning freely 1997 Ford Ranger

asked by on

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!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Get a quote

What others are asking

Q: New clutch but vehicle just revs when put into gear

Hey there. The clutch is self-adjusting and after service the pedal should be pressed five times to set the pedal free travel. If the clutch still does not engage then you may have a defective clutch pressure plate if the...

Q: crankshaft pulley harmonic dampener fell off after serpentine belt replacement

It could be that the condition of the pulley caused your belt failure in the first place. Deciding that depends on where the balancer separated.The balancer itself consists of a center hub with a pulley ring around it and a...

Q: Isn't the timing belt suppose to be changed at 90,000?

I would definitely recommend changing the timing belt at the 90,000 mile recommended interval. As you may know, the timing belt keeps your engine's critical components in sync. Fortunately, this model does NOT have what is called an "interference" engine...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.