Help!! Advice!! Crankshaft key failure
#1
Help!! Advice!! Crankshaft key failure
Kind of a long story, but I need to figure out the cause of this.
I was about to leave work, backed out, then I lost power steering/engine lights came on so I park it. I was first thinking it was a snapped belt, but the belt was fine and I noticed very dark watery oil on the alternator.
Uploaded with ImageShack.us
I had the car towed home, removed the belt thinking the alternator had seized, but the pulley still moves freely
I then started checking all pulleys (supercharged) all pulleys move freely, but I knew this was bad news because I had to get to the crank to check it. It wouldn't move clockwise(I didn't force it though), but when I turned counter-clockwise the bolt came loose.
Uploaded with ImageShack.us
Uploaded with ImageShack.us
Uploaded with ImageShack.us
I had noticed oil leaking under my car the day before, I figured it was either the plug gasket, oil pressure sensor, or sandwich plate, but it was the seal.
Oh, btw don't replace your harmonic balancer with a lightweight crank pulley.
Uploaded with ImageShack.us
Now, to find the cause/solution. Could the alternator seizing cause this, and still move freely? Anyone know what the long coil metal and half circle is from in the 4th pic? I did some searching, and found this happening to people and a possible fix was getting a new key for the shaft, but I'm worried about these other pieces.
Sorry for the long rant, hopefully somebody reads this all.
I was about to leave work, backed out, then I lost power steering/engine lights came on so I park it. I was first thinking it was a snapped belt, but the belt was fine and I noticed very dark watery oil on the alternator.
Uploaded with ImageShack.us
I had the car towed home, removed the belt thinking the alternator had seized, but the pulley still moves freely
I then started checking all pulleys (supercharged) all pulleys move freely, but I knew this was bad news because I had to get to the crank to check it. It wouldn't move clockwise(I didn't force it though), but when I turned counter-clockwise the bolt came loose.
Uploaded with ImageShack.us
Uploaded with ImageShack.us
Uploaded with ImageShack.us
I had noticed oil leaking under my car the day before, I figured it was either the plug gasket, oil pressure sensor, or sandwich plate, but it was the seal.
Oh, btw don't replace your harmonic balancer with a lightweight crank pulley.
Uploaded with ImageShack.us
Now, to find the cause/solution. Could the alternator seizing cause this, and still move freely? Anyone know what the long coil metal and half circle is from in the 4th pic? I did some searching, and found this happening to people and a possible fix was getting a new key for the shaft, but I'm worried about these other pieces.
Sorry for the long rant, hopefully somebody reads this all.
#3
After more research, I figure the circle cutoff is the key stock, and the spring was in the seal(both pic 4). I am also thinking the dark oil on the alternator could be motor oil leaking out of the seal and being carried on the belt to the alternator(being a different color than what's in the motor confused me).
Last edited by syberspyder; 12-24-2010 at 07:51 PM. Reason: new info
#4
The woodruff key is not pressed in to the crank for some reason... I found that out when my cranks were missing the front key. Had to use the back key from my spare and put it into the new one. They sell them at Ace hardware for like 13 cents.
#5
So, the key just rests in the crank keyway? I'm guessing the rounded side fits in the shaft? Back key from your spare?(timing chain gear maybe). LOL at the 13 cent key stock, I had to get a seal from the dealer so I just got the key from them too.
#6
Does anyone know if the front main seal sits flush with the front of the timing chain cover? I looked at the tech diy pulley install pics, and it looks like it's flush, but I figured I'd ask.
#8
I meant flush as opposed to further in. The gap between the inside of the seal and the crankshaft doesn't seem like much of a seal. I know the pulley fills the gap, but that couldn't be water tight. This will probably be perfectly clear when I put the seal in, I just want to make sure I didn't lose anything when towing the car home.
#11
looks like an agency crank pulley.
Iv had something similar happen to me on a stock crank pulley on a ka24de. stock pulley cracked and destroyed the seal, sending oil flying from the pulley in every direction. It damaged the woodruf key as well as the key way. I ended up getting an unorthadox underdrive pulley to replace the stock one, was about 50bux cheaper than stock replacement if i remember right. Car ended up a few months later flooded out from hurricane ike so i really couldnt find out if the underdrive pulley would hold up. It lasted for atleast 3k miles though.
im just gonna guess but it looks like either thats just a crap crank pulley or belt may have been too tight.
Iv had something similar happen to me on a stock crank pulley on a ka24de. stock pulley cracked and destroyed the seal, sending oil flying from the pulley in every direction. It damaged the woodruf key as well as the key way. I ended up getting an unorthadox underdrive pulley to replace the stock one, was about 50bux cheaper than stock replacement if i remember right. Car ended up a few months later flooded out from hurricane ike so i really couldnt find out if the underdrive pulley would hold up. It lasted for atleast 3k miles though.
im just gonna guess but it looks like either thats just a crap crank pulley or belt may have been too tight.
#13
I realized this and mentioned it in post #3, I had never seen the inside of a case seal, had to find out the hard way.
Thread
Thread Starter
Forum
Replies
Last Post
Sgtfluffy16
Regional - Northeast
3
07-28-2021 10:32 PM
steeze69
Scion tC 1G Drivetrain & Power
1
05-24-2021 02:57 AM
SJMiller
Scion xB 2nd-Gen Owners Lounge
0
09-12-2015 06:33 PM