Crankshaft won't turn after replacing timing belt

[dennis-1009]

I have a 6 bolt turbo Eagle Talon. I was replacing the timing belt and had turned the crankshaft numerous times and the engine turned normally. After I tried to start the vehicle and it would not turn over. I thought it was not timed properly and therefore I tried to turn the crankshaft and I was barely able to get it to turn. I tried to get it back to TDC and I could not get the crankshaft to turn enough. I am trying to see if anyone knows what could be causing this. I am assuming that the valves are bent, although I am not sure. Any help would be greatly appreciated.

 

[miguelmcv]

Yeap.
You might miss a couple of teeth at the timing.

Try to rotate the Crank on both directions.

If it doesn't turn to one side, It should turn to the other.

 

[92AWDHX40]

If you cant turn the crank i would redo the timing, you need to rotate it at least 6 times.

 

[Orange Car]

Take the car out of gear and put back into neutral =)

 

[whtgst]

Rotate it 6 times? Seems too much. 2 full revolutions of the crank will put the enging through the 4 strokes on all cylinders and if the marks line back up your fine. rotating it 6 times makes no difference. Or you can just mark the cams in the middle of both gears and rotate it until the marks line up again. Thats the same thing. Its easier to watch the cams than it is watching the crank. I also pull spark plugs so its easier to rotate the engine. If for any reason it stops. rotate it the other way until the marks line up again and redo it. If it stops it hit a valve. dont force it. valves bend pretty easily. even the slightest bend will cause a misfire.

 

[Boostinsideways]

Rotate it 6 times? Seems too much.

Seriously wish these newbs would quit posting about shit they don't know about.

Look at ANY how-to on the 4g63 timing belt and it will tell you six revolutions of the crank sprocket to get everything lined back up as it was. I do believe you have to do 6 to ensure that all of the timing marks line up. Cams, Crank, Oil Pump. Some people don't have to time the oil pump if they don't have balance shafts. But The replacement procedure was written assuming you do have balance shafts.

 

[DSMReviver]

Follow the instructions carefully...


Part 1.
6-Bolt Mitsubishi Timing Belt Replacement - YouTube

Part 2.
6-Bolt Mitsubishi Timing Belt Replacement Part 2 - YouTube

 

[whtgst]

Seriously wish these newbs would quit posting about shit they don't know about.

Look at ANY how-to on the 4g63 timing belt and it will tell you six revolutions of the crank sprocket to get everything lined back up as it was. I do believe you have to do 6 to ensure that all of the timing marks line up. Cams, Crank, Oil Pump. Some people don't have to time the oil pump if they don't have balance shafts. But The replacement procedure was written assuming you do have balance shafts.

actually, I'm not a newb. I have been an auto mechanic for 10 years and have replaced more timing belts than you can shake a stick at. I'm talking about making sure the engine was in time. You only need 2 revolutions of the crakshaft for a full cycle of all cylinders. I was not talkin about the balance shafts. Nowhere in my post was there any mention of balance shafts. And a balance shaft out of time won't stop a crankshaft from rotating.

 

[Calan]

You guys do realize that the last relevant post was over a month and a half ago... right? I hope the OP has figured out his problem by now.

 

[miguelmcv]

actually, I'm not a newb. I have been an auto mechanic for 10 years and have replaced more timing belts than you can shake a stick at. I'm talking about making sure the engine was in time. You only need 2 revolutions of the crakshaft for a full cycle of all cylinders. I was not talkin about the balance shafts. Nowhere in my post was there any mention of balance shafts. And a balance shaft out of time won't stop a crankshaft from rotating.

I won't discus this.

Some people does 4 or 6 turns to make it safe, some just do 2 turns..

I would say doing 6 is safe for the fact that, the Tensioner gets adjusted by turning 6 times,,,,,, my opinion, 2 turns is enough for the valves to hit the piston.

This is more like, Who does the job, and not how the job supposed to be.

Personally, I always have turn it only 2 times.

You guys do realize that the last relevant post was over a month and a half ago... right? I hope the OP has figured out his problem by now.

Yea, I knew that.

That's why I didn't give any advice to the OP.

But, I wanted to give my opinion on this guys discussion.

 

[Calan]

You guys are over-complicating the number of turns thing. On a stock 4G63 with balance shafts, it takes 6 full revolutions of the crankshaft to get all the timing marks lined up due to the different rates of rotation between the components. That's it... nothing more to it.

If you don't have balance shafts, then it doesn't matter where the oil pump sprocket is aligned; although it is good practice to align it as if the balance shafts were still there to avoid confusion in the future. In this case, it doesn't take any full revolutions at all to get things aligned...if cylinder #1 is at TDC and the cam gears are properly oriented, it's aligned.

The tensioner adjustment doesn't really have anything to do with how many times you turn the motor. It just needs to be "worked" a couple of times and then allowed to rest for 15 minutes or so until it stabilizes.

BTW - You should never rotate the motor CCW unless absolutely necessary, mainly due to the risk of backing out the crank bolt. It can also potentially have minor effects on the tensioner, accessory belts, clutch, and anything else that has settled into a CW rotation pattern...at least in theory.