Question about 1998 Ford Taurus

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Pistons are locked up how to free motor

We need to know how to unlock motor or how to find out if motor is locked up or if something else might be a problem

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So, whats going on...your description is too vague

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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Un seized the piston and engine turned easily turning the flywheel by hand removed flywheel piston down put it back and removed again later dont know if the piston was down engine now tight to turn


Pistons only seize when they set for a long time when moisture or water in the engine( will eat the rings up, rust, smokes oil). Bearings lock. You can break them free, but will usually lock again with a 360 degree turn on the crank shaft. Either way I would rebuild or replace the engine. Depends on the engine.

Oct 31, 2016 | Cars & Trucks

2 Answers

How would i disconnect the transmission from the motor when the motor is locked up


Try using an impact socket on the balancer bolt, with a 3/4" Johnson bar and a long steel pipe for leverage. If that doesn't work your only other option may be to remove the heads, spray WD40 all around the edge of the pistons, then place a piece of wood like a 4 x 4 on top of each piston and give it a few really good hits with a heavy hammer, that may free the pistons enough so you can turn the crankshaft.

Mar 01, 2015 | 2006 Chevrolet Cobalt

3 Answers

I have a 2005 LR3, last night the front passenger wheel locked up on me. When I applied small pressure to the brake, it just locks up. I stop na dput the car in reverse and it unlocks. It may run 20 f


There is definitely something out of the ordinary going on. The brake calipers have two pistons on one side which means that the whole caliper has to be able to move axially as the brakes are applied to evenly clamp the two friction pads against the rotor. There are no springs to release the brake pads from the caliper.
Probably one of the pistons is stuck causing the assembly to bind until you reverse the rotor's motion which releases the binding force. It is probably the lower piston of the two that is binding because that is where any crud in the brake fluid tends to accumulate.
If you take off the caliper off, you may be able to loosen the stuck piston with a brake piston removal tool and bleed fresh fluid through the system.

Jan 31, 2015 | 2005 Land Rover LR3

1 Answer

Door locks not working


could be a wiring short, but if you hear the lock motor moving i believe the lock actuator has broken free. the rivets break free at times and i've used screws and washers the reattach the actuator in place without having to pull apart the door. try to see if you hear 1 doorlock at a time. if when you press the button, the motor sounds and theres movement thats your problem. if you press and theres no motor then you either have no power to the motor or its bad. current tester to the switch will tell you either way.

Oct 18, 2013 | 2002 Ford Expedition

1 Answer

My cadillac sedan deville motor is locked how do i unlock it


It would depend on what failed.
Timing chain, crank bearing, piston, etc.
Unless one of the accessories locked up and the belt is the only thing holding it, you would probably have to take the engine apart to fix it.
Once in a while the alternator or water pump will seize up and the belt will keep the crank from turning.

Feb 26, 2013 | 1989 Cadillac Sedan DeVille

1 Answer

Passenger side camshaft locked up, any advice?


I don't know what you got going there but the cams cannot turn with them bolted to the engine, the valves will hit the pistons, most cars do anyway, very few are free running now days. If your Kia is a free running engine then it should spin free, but if it doesn't, it has jumped a tooth or something is hitting. So, what are you doing? Timing belt? You should not have to touch the cams, usually just lock them in place to stop them from back lashing, or seating themselves, They don't go far, but it scares the **** out of you when they jump. Will need more info to figure out what you have going on there. Hope this helps.

Jun 28, 2011 | 1998 Kia Sportage

1 Answer

A few days a go my locks on my 2002 saturn started fluttering and making clicking sounds. I can only unlock my car with the key now and all the locks have to be unlocked and locked manually. Then a few...


Do you or your husban know how to trouble shoot automotive electrical systems , using a wiring diagram and a DVOM - digital volt ohm meter ? Do you know how to trouble shoot electronic control modules an circuitry ? The BCM - body control module controls the power locks , anti-theft system . The first step in diagnosing problems like this involve hooking of a scan tool that can pull BCM codes . No auto parts store can check these codes .
DOOR LOCKING/UNLOCKING
Door locking/unlocking, by remote keyless entry (RKE) or driver/all door lock switches, is controlled through the BCM.
When a driver door unlock has been requested, the BCM switches circuit 694 to battery voltage. This energizes the driver door unlock relay which supplies power to the driver door lock motor. Grounding is achieved through the closed contacts of the all-door lock relay. Grounding is also achieved through the windings of the all-door lock motors and the all-door unlock relay.
When an all-door unlock has been requested, the BCM switches circuit 194 to battery voltage. This energizes the door unlock relay which supplies power to the all-door lock motors. Grounding is achieved through the closed contacts of the door lock relay. Grounding is also achieved through the winding of the driver door lock motor and the driver door unlock relay.
When an all-door lock has been requested, the BCM switches circuit 195 to battery voltage. This energizes the door lock relay which supplies power to all-door lock motors. Grounding is achieved through the closed contacts of the door unlock relay and the BCM.
Lock/Unlock power application is limited by the BCM to 7 seconds to protect lock motors.

SECURITY SYSTEM
The passlock sensor is powered by circuit 1459. The passlock sensor is grounded by circuit 1835. Passlock sensor data is supplied to the BCM by circuit 1836.
The passlock sensor data supplied to the BCM is in the form of V-codes or voltage codes. When the proper ignition key is turned in the ignition switch, the correct V-code is supplied to the BCM. The BCM responds by sending a serial data password to the engine controller allowing the engine to run.
Under a tamper condition, a specific V-code is supplied to the BCM. The BCM will send a class II message to the PCM disabling the fuel injectors.


Electric Testing Techniques You Need to Know

ECM Inputs and Outputs Diagnosis

http://www.bbbind.com/free_tsb.html free wiring diagrams ! Enter vehicle info. year , make , model an engine size . Under system click on Body & Accessories , then under subsystem click on Body controls .Then click on the search button , then the blue link . You will see all inputs and outputs from the BCM . Check B+ voltage at the door lock switches . Check door lock fuse 20amp . Check door lock an unlock relays .


https://en.wikipedia.org/wiki/Body_control_module

Also test the starting circuit !
How to voltage drop test starter motor circuit


May 10, 2017 | 2002 Saturn S-Series

2 Answers

I have a 1991 Eagle 2000 gtx, sold in the States as a Mitsu. Galant. It has the DOHC 2000c.c. motor. The brakes come on all by themselves. It happens about once every 2 weeks. It takes about 15 min....


What I would do is flush brake system could have water in brake fluid. I would also replace both front brake hoses, flush brake system 1st then replace hoses.

Nov 23, 2009 | 1991 Mitsubishi Eclipse

1 Answer

Locked motor


you need to check to make sure there is enough oil in it and then you take a socket with a large breaker bar disconnect the negative side of the battery and take the socket and breaker bar and put it on the crank and rock it back and forth to see if you can free it up

Apr 11, 2009 | 1991 Ford Explorer

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